Home

Price: $25 US

1. 1 the transmission of data signals 2 the receipt of data signals 2 1 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL FIGURE 6 Point to Point Configuration 4 Channel Operation 4 Channel Configuration The Model 5941 and Model 5942 can support up to 4 RS232 devices each connected to one of the 4 available channels see Figure 6 Any two IED s connected via a single channel on the Model 5941 or Model 5942 must be set to transmit at the same baud rate and be running the same protocol This is not a requirement for all devices connected on different channels in the same Link Each individual channel can support different protocols and baud rates As an example 2 IED s connected via channel 1 on a pair of 5941 s could be transmitting at 64K baud communicating using the DNP3 protocol while 2 IED s connected via channel 2 on the same pair of 5941 s could be transmitting at 1200 baud communicating using a bit oriented protocol and the channel 3 IED s could be transmitting at 2400 baud communicating using the ModBus protocol None of these IED s would interfere or communicate with the others IED s connected to a different channel For the standard family of the Model 5941 and Model 5942 D1 suffix devices only the IED s connected to channel 1 can have a data rate higher than 4K baud channel 1 only will support device data rates up to a maximum of 64K baud For the extended family of the Model 5941 and Model 5942 D4
2. 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 85 C 40 to 85 C 5 4 Watts 300 mA 24 48 Vdc 60 mA 90 250 Vdc Vac 11 Ozs 18 4 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5942SD1 Single mode 19 dB 14 5 dBm peak 33 5 dBm peak 91 125 Single mode 1310nm ST Single Mode 9 13um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 1 Channel DC to 4K bps 3 Channel Asynchronous simplex Half or Full Duplex 30K meters 91 125 Cable 0 5dB km 10 E9 Max 25yS Channel 1 100uS Channels 2 3 4 1uS Channel 1 12 5 Channels 2 3 4 ElA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 70 C 40 to 85 C 5 4 Watts 300 mA 24 48 Vdc 60 mA 90 250 Vdc Vac 11 Ozs 18 4 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5942D4 RS232 4 Channel Optical Parameters Optical Budget Typical Output power Typical Receiver Sensitivity Typical Wavelength Connector Type Compatible Fiber Type Configuration Switches Data Rate Data Transmission Transmission Distance Bit Error Rate Point to Point Latency Typical Jitter Typical Electrical Parameters Inputs Data Format Data Connector Input Voltage Outputs Output Impedance Driver
3. Duplex FOC has two optical conductors and is a convenient form when connecting two units Point to Point Breakout cable is a duplex FOC that has extra strength members added and is suitable for burial 3 3 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL The following are the specifications of multi mode FOC offered by DYMEC and is the recommended minimum standard for optimum performance Breakout Fiber Count Fiber Material Attenuation Diameter Weight Tensile load Short Term dB km mm kg km N Minimum Bend Radius With Load Minimum Bend Radius No Load cm cm Crush Resistance Impact Resistance Flex Resistance Operating Temperature Storage Temperature Millimeters Centimeters Meters Kilometers Kilometers Feet Feet Miles Inches Inches METRIC TO ENGLISH UNIT CONVERSIONS MULTIPLY BY 0 03937 0 3937 3 2808 3280 8 0 62137 N cm Cycles Cycles Pc 1000 7500 40 to 485 55 to 485 Kilograms Kg Km Newtons N Cm 3 4 750 1000 7500 40 to 85 55 to 85 Pounds Pounds 1 000 Ft Pounds Pounds inch 55 to 85 MULTIPLY BY 2 2046 0 67197 0 22481 0 57101 4 1 4 2 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL TESTING AND TROUBLESHOOTING TESTING Models 5941 and 5942 lend themselves to easy installation and testing Testing the units only requires that the units are powered and conn
4. Industrial Fiber Optic Links Models 5941 and 5942 Models 5941S and 5942S User Manual UM5941 REVAD 5 00 USD Q 25 Commerce Way 1 North Andover MA 01845 978 688 8807 FAX 978 688 8771 www garrettcom com GarrettGom Industrial Networking at Its Best 3 44 0006 00 Printed in USA Warnings Cautions and Notes as Used in this Publication WARNING Warning notices are used in this publication to emphasize that hazardous voltages cur rents or other conditions that could cause personal injury exist in this equipment or may be associated with its use In situations where inattention could cause either injury or damage to equipment a Warning notice is used CAUTION Caution notices are used where equipment malfunction is possible if care is not taken NOTE APPLICATION NOTE Notes and Application Notes call attention to information that is especially significant to understanding and operating the equipment This document is based on information available at the time of its publication While efforts have been made to be accurate the information contained herein does not purport to cover all details or variations nor to provide for every possible contingency in connection with installation opera tion or maintenance DYMEC assumes no obligation of notice to holders of this document with respect to changes subsequently made DYMEC makes no representation or warranty expressed implied or statut
5. Signal Common Channel 1 Transmit Data Out Channel 2 Transmit Data Out Channel 3 Transmit Data Out IRIG B Channel 4 Transmit Data Out Sync Indicator Figure 2 Device Pin out 1 5 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL 1 2 2 1 2 3 1 2 4 1 2 5 1 2 6 DTE DCE Switch The DTE DCE Switch is not implemented on the Model 5941 or Model 5942 Mode Switch The Mode switch is not implemented on the Model 5941 or Model 5942 Channel 4 Output Option Select Switch 1 Models 5941 and 5942 Links are provided with this switch to allow users who do not require 4 data channels to use pin 9 as a sync indicator If the connection between the 2 Links is good the output on this pin will be high if the connection between the 2 devices is lost due to cut fiber or device failure the output of this pin will be low on both devices Channel 3 Output Option Select Switch 2 Models 5941 and 5942 Links are provided with this switch to allow users who require more drive current on a single data channel to use data channel 3 pin 8 to accomplish this If the switch is set to IRIG B higher drive current is available up to 20ma also selectable Channel 3 Current Output Option Switch 3 Models 5941 and 5942 Links are provided with this switch to allow users who have selected the IRIG B option for channel 3 to further select one of 2 output current values Selections are 10ma or 20
6. Consideration should be given that the current value selected is appropriate for the input of the device being connected to this data channel Simplex Communication Transmit only or receive only communications Half Duplex Communication Sequential transmit and receive communications Full Duplex Communication Simultaneous transmit and receive communications Transmit optical port Also the diagnostic LED that illuminates when the Link is receiving an electrical transmit from its IED Receive optical port Also the diagnostic LED that illuminates when the Link is receiving an optical signal Optical Budget The optical budget is expressed in dB and is the amount of light loss tolerated for communication The total distance between two devices that a signal can be transmitted is determined by subtracting all the losses of the circuit from the optical budget Various factors in the optical circuit attenuate the light transmission and must be accounted for to assure a reliable optical circuit Key factors include cable attenuation expressed as dB per unit length cable aging and cable fittings terminations splitters etc Non Return to Zero NRZ This type of encoding scheme does not require the voltage potential of each data bit to return to the zero potential No clock or timing recovery is provided with this type of communication except in the start and stop bits usually found on each data word Return to Zero RZ This type
7. Output IRIG B Mode Ch 3 Ambient Temperature Operating Temperatures Storage Temperature Power Required Weight Power Dissipation BTU H Dimensions Inches Indicators Multimode 19 5 dB 10 5 dBm peak 30 dBm peak 62 5u 125 Multimode 850nm ST Multi Mode 50 200um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 4 Channels Asynchronous simplex Half or Full Duplex up to 5000 meters 62 5u 125 Cable 3dB km 10 E9 Max 25yS All Channels 1 5 All Channels EIA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 85 C 40 to 85 C 5 4 Watts 300 mA 24 48 Vdc 60 mA 90 250 Vdc Vac 11 Ozs 18 4 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5 4 5942504 Single mode 19 dB 14 5 dBm peak 33 5 dBm peak 91 125 Single mode 1310nm ST Single Mode 9 13um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 4 Channels Asynchronous simplex Half or Full Duplex 30K meters 99 125 Cable 0 5dB km 10 E9 Max 25uS All Channels 1uS All Channels EIA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 70 C 40 to 85 C 5 4 Watts 300 mA 24 48 Vdc 60 mA
8. of encoding scheme requires the voltage potential of each data bit to return to the zero potential This allows timing recovery with each bit instead of just the start and stop bits of the data word 1 3 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL Number of Repeats The Number of Repeats is the number of Links that may be connected in a loop configuration The sum of Slaves in a Master Slave loop is the number of repeats for that type of loop The number of Peers minus one is the number of repeats in a Peer to Peer loop Asynchronous Communication This type of communication does not transmit a separate clock signal with the data signal Links support asynchronous communication A communication scheme where the clock needs to be transmitted Synchronous Communication is not supported unless the data and clock are transmitted together on the same pin Synchronous Communication This type of communication does transmit a separate clock signal with the data signal Under special circumstances the Model 5941 and 5942 Links support up to 2 Synchronous communication devices in the same cabinet over 1 pair of fiber Hardware Handshaking Hardware handshaking is a method for 2 RS232 devices with different data buffering capabilities to communicate reliably with each other via an RS232 electrical port Extra signals are defined to control the flow of information between devices IRIG B IRIG B is a serial time synchronization stan
9. supported with 5941 or 5942 s Slave A Slave is an IED that is passive in a Master Slave loop A Slave s communication is under the control of the Master and should be controlled to prevent data collision in the loop All communication generated by the Master will be repeated through each Slave and back to the Master A Slave s mode switch is always in the REP position Not supported with 5941 or 5942 s FOC Fiber Optic Cable Single mode Single mode fibers generally have diameters of 5um to 13um Because of this small core only one axial path for light propagation is available through the fiber The optics required to drive single mode fiber have to be highly focused so that minimum dispersion occurs Though requiring more expensive optic emitters the benefit is that longer transmission distances 30 km 18 miles or 98K feet can be achieved Multi mode Multi mode fibers have core diameters of 50 and larger This larger core allows the light rays to be propagated along several different paths down the fiber The different paths include an axial component as well as reflected components Multi mode units are economical and effective for transmission over distances up to 5 km 3 miles or 16K feet Data Coupling Switch Some Link models are provided with this jumper to easily adapt the device for either DC or AC electrical Input data coupling With AC data coupling the minimum input data rate is 1200 baud with DC data coupling t
10. you can get the optical budget loss information from their manufacturer s Aging As FOC ages tiny cracks will form in the glass core of the fiber These will cause the attenuation of the cable to increase The optical emitters age over time causing a reduction in their optical launch power DYMEC suggests that a buffer be applied to the optical budget to assure proper operation of the unit over a 20 year life A 2 5 dB to 3 dB loss factor is suggested to compensate for system aging over 20 years EXAMPLE FOC is 62 5 125 um multi mode DYMEC supplied 100 kpsi rated 3 dB km and 3 dB for aging No other attenuating items in the circuit initial 19 5 dB Optical Budget less 3 dB aging less 0 dB for other circuit attenuation fittings equals 16 5 dB divided by 3 dB km equals 5 5 km maximum distance of FOC between transmitter and receiver NOTE FOC extends communication beyond normal RS 232 Standards limits allowable between Links must be calculated using the factors listed above POWERING THE LINK 3 3 1 Model 5941 only Model 5941 can only be powered by means of the power connector located on the back of the unit The unit has an input voltage range of 9 to 15 Vdc and requires a maximum of 200 mA over the entire operating temperature range DYMEC s Model 4310 ac to dc power adapter is designed specifically for this purpose It connects directly into a normal 110 volt power receptacle and has an operating temperature
11. 90 250 Vdc Vac 11 Ozs 18 4 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5 2 Mechanical Dimensions of the 5941 GND STUD I T 12 VOLTS DC Only 1 26 36 32 THREAD SST o O O ES H E a 2 1 25 t c c e SWITCH ACCESS 2 06 DYM EC MODEL 5941 LINK RS232 4 CHANNEL MADE IN 5 17 REMOVABLE ACCESS PLATE TYPE ST 9 PIN D CONNECTOR WITH F O CONNECTOR 4 40 STANDOFF HARDWARE NOTE DIMENSIONS ARE IN INCHES Mechanical Dimensions of the 5942 46 32 THREAD SST 46 5 14 DYM EC MODEL 5942 LINK en TT RS232 4 CHANNEL 90 250 Vdc Vac H d 4 12 MADE IN U S A 24 48 Vdc L SWITCH ACCESS O sync PwRO REMOVABLE ACCESS PLATE TYPE ST 9 PIN D CONNECTOR WITH 4 40 STANDOFF HARDWARE F O CONNECTOR 6 0 Ordering Information LINKS Model EIAStd__ FiberType_ _ Input Power Rating 64K Baud Data Rate_ ACCESSORIES Model jDescripion 5753A XXXX Simplex Multi Mode Fiber Optic Cable 62 5 125 um 100 KPSI Suitable for use in cable troughs conduit and outdoor applications Duplex Multi Mode Fiber Optic Cable 62 5 125 um 100 KPSI Suitable for use in cable troughs conduit and outdoor applications 5756A XXXX Breakout Duplex Multi Mode Fiber Optic Cable 62 5 125 um 100 KPSI Suitable for use in cable troughs conduit and outdoor applica
12. 942 are similar except for the method in which they are powered Models 59415 and 59425 have the same features and functionality described for the Models 5941 and 5942 respectively except that they have single mode optics for use with single mode fiber cable NOTE This manual makes reference to the Model 5941 and Model 5942 when describing features and functionality of the Links These descriptions generally apply to the Model 5941S and Model 59425 as well When different a specific reference is made identifying the particular model s and their variation The user should read this manual to fully understand how to use the many features of the Links in an effective communication system DEFINITIONS The following terms are used in this manual IED An IED is any intelligent electrical device capable of RS 232 and or TTL data communications such as a computer RTU PLC smart meter relay etc The IED must have resident software or firmware that manages the data communication logic including protocol formatting and timing addressing capability if required and scheduling Point to Point Configuration Two Links connected directly to each other Only configuration supported with 5941 or 5942 s Master Slave Loop Configuration More than two Links connected together where the FOC connects the T optical port of one device to the R optical port of the next unit in the loop One IED is designated as the Master and controls all the com
13. DC to 4K bps 3 Channel Asynchronous simplex Half or Full Duplex up to 5000 meters 62 5u 125 Cable 3dB km 10 E9 Max 25yS Channel 1 100p S Channels 2 3 4 1uS Channel 1 12uS Channels 2 3 4 ElA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 85 C 40 to 85 C 2 4 Watts 200 mA 9 15 Vdc 8 Ozs 10 2 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5 1 5941SD1 Single mode 19 dB 14 5 dBm peak 33 5 dBm peak 91 125 Single mode 1310nm ST Single Mode 9 13um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 1 Channel DC to 4K bps 3 Channel Asynchronous simplex Half or Full Duplex 30K meters 91 125 Cable 0 5dB km 10 E9 Max 25yS Channel 1 100uS Channels 2 3 4 19S Channel 1 12uS Channels 2 3 4 EIA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max 2300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 70 C 40 to 85 C 3 0 Watts 250 mA 9 15 Vdc 8 Ozs 12 8 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel All Specifications are subject to change without notice 5941D4 RS232 4 Channel Optical Parameters Optical Budget Typical Output power Typical Receiver Sensitivity Typical Wavelength Connect
14. EC Models 5941 59415 5942 and 59425 are multi channel maximum of 4 channels data communication Links that allow the replacement of copper wire with fiber optic cable Links simply convert electrical signals to light for transmission then when received convert the light signals to electrical This is done in RS 232 formats Link Repeaters are passive to software protocol They are not addressable in communication protocols and do not provide any control logic capability supporting communication protocols Link Repeaters are designed with several features that allow easy installation and flexibility in configuring for various communication systems There are two families of the 5941 and 5942 In the standard family designated by a D1 suffix e g 5941D1 channel 1 supports up to a full 64K baud data rate and channels 2 3 and 4 support a maximum of 4K baud date rates each This combination of data rates is more than adequate to support such functions as Full Handshaking IRIG B unmodulated timing synchronization signals or additional slow data rate IED s The extended family designated by a D4 suffix e g 5941D4 supports 64K baud data rates for all four data channels These models can be used for 4 Asynchronous RS232 devices if located in a single cabinet and not separated from the link by more than 3 Meters or 10 feet or 1 or 2 Synchronous RS232 devices If the devices only require 1 transmit and receive clock per device Models 5941 and 5
15. able Cable attenuation is expressed as X dB per kilometer Other factors of attenuation include FOC fittings terminations splitters etc FOC diameter and FOC aging Optical budget is the result of the expression Optical Budget dB 10 xlog1o Receiver sensitivity uw _ Launch Power uw Each Model 5941 or 5942 Link has an available optical budget of 19 5 dB Each Model 59415 59425 Link has an available optical budget of 19 dB 3 2 1 Cable Attenuation Factors The following cable factors must be applied as corrections to the optical budget 3 2 1 1 Diameter Multi mode FOC of different diameters will vary the available optical budget of a system due to different FOC core diameters The 19 5 dB optical budget is applicable to 62 5 um diameter FOC Table 1 shows the correction factors to use on the available optical budget for different diameter cable Table 1 FOC Diameter Factor Single mode 19 dB of optical budget is available and is essentially consistent for fiber diameters 3 1 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL 3 3 3 2 1 2 3 2 1 3 Fittings Adding additional splices feed throughs or patches to the FOC will add losses to the available optical budget When using multi mode Fiber Optic Cable terminated and supplied by DYMEC optical connector losses can be ignored because the cable is tested after the terminations are added If you are using fittings not supplied by DYMEC
16. dard The Dymec links support unmodulated or Manchester encoded IRIG B time streams at RS232 electrical levels Sync The design of the 5941 and 5942 support an internal diagnostic that monitors the fiber link between the two devices and allows the devices to synchronize sync the data streams transferred Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL 1 2 MODEL 5941 AND MODEL 5942 LINKS NOTE The 5941 and 5942 links contain no serviceable parts Opening the unit will void the warranty Each Link consists of the following elements shown in Figure 1 1 2 1 6 32 Thread SST Diagnostic LED s Earth Ground Power Input I SWITCH ACCESS QsvNc PwRO DYM EC MODEL 5941 LINK RS232 4 CHANNEL MADE IN U S A V Removeable Type ST 9 Pin D Sub Access Plate Fiber Connector Connector FIGURE 1 Elements of the Link 9 Pin Data Port D connector The Link connects to an IED s RS 232 communication port The pin out configuration of the Link is shown in Figure 2 An adapter is required to connect individual IED s RS232 ports to one of the Model 5941 or Model 5942 4 data channels Pin 1 is indicated in Figure 4 Receive ports are device input pins and Transmit is a device output pin on the links Primary Pin Definition Optional Pin Definition Channel 1 Receive Data In Channel 2 Receive Data In Channel 3 Receive Data In Channel 4 Receive Data In
17. e side of the case A suitable earth ground minimum 14 gauge wire up to 5 foot in length connected to the grounding stud on the side of the Link is required for safe operation Remove the power plug from the power jack of the Link Connect the power lines to the power plug being careful not to leave any wire strands exposed This power input to the Model 5942 or Model 5942S is Surge Withstand Protected to IEC EN61000 4 4 and EN61000 4 5 Standard ANSI IEEE C37 90 1 1989 NOTE Model 5942 and Model 5942S can be ordered to accommodate 24 Vdc to 48 Vdc power WARNING When installing a Model 5942 Link an Earth Ground must be attached to the Ground Stud minimum 14 gauge wire up to 5 foot in length on the side of the case before connecting to power Failure to follow this procedure may result in electrical shock to personnel 1 2 11 Peripheral Equipment 1 2 11 1 IED An IED is any intelligent electrical device such as a computer RTU PLC smart meter relay etc that has the ability to communicate data via RS 232 format The IED should have a communication port for the connection of the Link An adapter must be made to accommodate the connection Care should be taken to assure that the correct signals are connected to each other See Figure 2 for the Link s pin signal assignments Check your IED s equipment manual for its signal assignments The IED must also have intelligent software to execute the data communication This intell
18. ected via fiber due to the design of the 5941 5942 both fibers are required to be connected for this test Once the fiber is connected and the units powered if the fiber connection is good the SYNC LED will illuminate and remain on Testing the data channels requires transmitting and receiving data while observing that the diagnostic LEDs are illuminating in the proper sequence To test whether a standalone unit is transmitting and receiving correctly insert a short fiber jumper between its T and R optical ports note if the SYNC LED is illuminated then transmit a signal and note that both diagnostic LEDs on the channel being tested should illuminate during communication refer to Figure 5 TROUBLESHOOTING o Ifthe unit does not work properly use the following check list Is the unit properly powered o Verify the unit is receiving the correct power Check that the diagnostic LEDs are responding to the data activity of the channels connected to IED s Is the unit mated properly to the IED If an adapter is used check that pin assignments are connected correctly and that the data channels connect the intended devices o Are the fiber cables connected properly T to R not R to R nor T to T Determine that the IED s originating signal is within standards NOTE If the Link is not connected directly to an IED determine that the electrical signal received by the Link is not corrupt The Link only repeats the signal it is given it does
19. equires an IRIG B timing signal and has a separate IRIG B input pin can connect the IRIG B signal via a channel 3 on the Model 5941 or Model 5942 The source for the IRIG B signal can be the master IED if it has an IRIG B output pin or an additional device that is dedicated to IRIG B signals The IRIG B source must be connected to pin 3 of the local 5941 or 5942 the IRIG B configuration switches do not need to be set on the local 5941 or 5942 For the 5941 or 5942 connected to the remote IED that requires the IRIG B input the IRIG B configuration Switch must be set if the input pin does not meet the requirements of the RS232 standard high impedance 30 Vdc The Model 5941 or Model 5942 offers 2 options when required to drive a low impedance 56 or 75 Ohm load input When the Channel 3 Output Option Switch is set for IRIG B there is an additional switch setting that allows the choice of 10mA or 20mA drive current to assure proper output voltage levels can be achieved At the 10mA setting a 56 Ohm load will be driven from 0 volts to 2 5 volts the 20mA setting will drive the same 56 Ohm load from 0 to 3 volts Be careful to choose a current level that does not damage the input pin of the device it is connected to For the standard family of the Model 5941 and Model 5942 D1 suffix devices only the IED s connected to channel 1 can have a data rate higher than 4K baud Channel 1 only will support device data rates up to a maximum of 64K baud For t
20. he extended family of the Model 5941 and Model 5942 D4 suffix devices any or all IED s on all 4 channels can have a data rate of up to 64K baud 2 3 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL IRIG B Source 16 27 38 49 16 27 38 49 Figure 7 IRIG B Configuration Point to Point 2 1 2 1 Installation for a Single Channel and IRIG B signal 1 Connect a data channel transmit and receive pins of the Link to the IED s RS 232 communication port including the adapter 2 Connect the IRIG B source to pin 3 of the local 5941 or 5942 3 Connect pin 8 of the remote 5941 or 5942 to the IRIG B input pin of the remote IED 4 Set the CH4 Output Option Switch of the remote 5941 or 5942 to IRIG B if the input on the remote IED does not conform to the RS232 input specification 5 Connect the Fiber Optic Cables T of one device to R of the second device 6 Connect power to the Link as follows a The unit can only be powered through the power connector b Connect power leads to the power connector and then energize the power Source The unit is now powered WARNING When installing a Model 5942 or 59425 Link an Earth Ground minimum 14 gauge wire up to 5 foot in length must be attached to the Ground Stud on the side of the case before connecting to power Failure to follow this procedure may result in electrical shock to personnel 7 The units are now installed and operating 2 4 Models 5941 and 5942 M
21. here is no minimum input data rate but a signal stuck on the input will lock up a loop bussed or star network Not supported with 5941 or 5942 s Mode Switch The mode switch enables ON or disables OFF the repeater function of some models of Link Not supported with 5941 or 5942 s 1 2 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL DTE DCE Switch Some Links are provided with this switch to easily adapt the device for either the DTE or DCE configuration of the equipment that it connects Not supported with 5941 or 5942 s Channel 4 Output Option Switch Switch 1 Models 5941 and 5942 Links are provided with this switch to allow users who do not require 4 data channels to use pin 9 as a sync indicator If the connection between the 2 Links is good the output on this pin will be high if the connection between the 2 devices is lost the output of this pin will be low Channel 3 Output Option Switch Switch 2 Models 5941 and 5942 Links are provided with this switch to allow users who require more drive current on a single data channel to use data channel 3 pin 8 to accomplish this If the switch is set to IRIG B higher drive current is available up to 20ma also selectable Current Output Option Switch Switch 3 Models 5941 and 5942 Links are provided with this switch to allow users who have selected the IRIG B option for channel 3 pin 8 to further select one of 2 output current values Selections are 10ma or 20ma
22. ic control Using channel 2 and channel 3 of the 5941 and or 5942 this implementation can be supported 2 6 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL For the standard family of the Model 5941 and Model 5942 D1 suffix devices only the IED s connected to channel 1 can have a data rate higher than 4K baud channel 1 only will support device data rates up to a maximum of 64K baud For the extended family of the Model 5941 and Model 5942 D4 suffix devices any or all IED s on all 4 channels can have a data rate of up to 64K baud 16 27 38 49 16 27 38 49 Figure 9 Typical Hardware Handshaking Setup 2 1 4 1 Installation for Hardware Handshaking using RTS CTS Signals 1 Connect a data channel transmit and receive pins of the Link to the IED s RS 232 communication port including the adapter Connect the Handshaking Signals to be used to channel 2 of the Link using the adapter in step one Connect the Fiber Optic Cables T of one device to R of the second device Connect power to the Link as follows a The unit can only be powered through the power connector b Connect power leads to the power connector and then energize the power Source The unit is now powered WARNING When installing a Model 5942 or 59425 Link an Earth Ground minimum 14 gauge wire up to 5 foot in length must be attached to the Ground Stud on the side of the case before connecting to power Failure to follow this procedure may
23. igence needs to logically manage the data and signal traffic including any addressing token passing data formatting and scheduling 1 2 11 2 Fiber Optic Cable FOC The selection of the fiber optic cable is important High quality cable can assure the maximum performance of your Link Important factors to consider are the manufacturer s specification on attenuation per unit length attenuation due to aging diameter and tensile strength Choosing the best quality FOC for your installation is important 1 9 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL NOTE DYMEC can supply multi mode glass FOC in either Simplex Duplex or Breakout construction cut to length terminated polished and tested The specification for all DYMEC supplied cables are as follows Fiber Diameter 62 5 125um Tensile Strength 100 kpsi Loss 3 dB per kilometer Aging Loss less than 3 dB Model 5941 and Model 5942 Link optical ports are designed for ST type terminations and are compatible with multi mode FOC ranging from 50 um to 200 um Model 5941S and Model 59425 Link optical ports are designed for ST type terminations and are compatible with single mode FOC ranging from 5 um to 13 um 2 2 1 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL CONFIGURATIONS OPERATION AND INSTALLATION Model 5941 and Model 5942 Links can only be connected in a Point to Point configuration These models are designed to accept electrical inpu
24. ing data When a Link channel is transmitting the T LED will illuminate to show the transmit path active When a Link channel is receiving light signals the R LED will illuminate LEDs only illuminate when the path is active powering of the unit does not illuminate the LEDs unless their path is active When data is present on the paths the LEDs may flicker this is normal The diagnostic LEDs may be used for trouble shooting by observing that the illumination of the LEDs corresponds with activity in the unit See Figure 5 for LED patterns and signal paths The Sync LED reflects the status of the fiber connection plus the health of the two links Status information is constantly exchanged between the two links if these status messages show a fault or are not received this Sync LED will not be illuminated if Ch4 Output option is selected pin 9 will reflect the state of this LED Whenever two 5941 or 5942 s are connected via fiber and powered up the Sync LED should be illuminated The final diagnostic LED is the PWR LED this LED will illuminate whenever the appropriate power is connected to the device 1 7 Models 5941 and 5942 Models 5941S and 59428 RS 232 or TTL SYNC R CH1 Or cm TO R CH2 TO CET Normal Transmission Normal Receive FIGURE 5 Diagnostic LED patterns and signal paths NOTE The CH or DATA LEDs only illuminate when there is signal traffic and are not illuminated during signal quiet ti
25. l Channels 1uS All Channels ElA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 70 C 40 to 85 C 3 0 Watts 250 mA 9 15 Vdc 8 Ozs 12 8 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5942D1 RS232 4 Channel Optical Parameters Optical Budget Typical Output power Typical Receiver Sensitivity Typical Wavelength Connector Type Compatible Fiber Type Configuration Switches Data Rate Data Transmission Transmission Distance Bit Error Rate Point to Point Latency Typical Jitter Typical Electrical Parameters Inputs O Data Format Data Connector Input Voltage Outputs Output Impedance Driver Output IRIG B Mode Ch 3 Ambient Temperature Operating Temperatures Storage Temperature Power Required Weight Power Dissipation BTU H Dimensions Inches Indicators Multimode 19 5 dB 10 5 dBm peak 30 dBm peak 62 5u 125 Multimode 850nm ST Multi Mode 50 200um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 1 Channel DC to 4K bps 3 Channel Asynchronous simplex Half or Full Duplex up to 5000 meters 62 5u 125 Cable 3dB km 10 E9 Max 25uS Channel 1 100uS Channels 2 3 4 1uS Channel 1 12 5 Channels 2 3 4 EIA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms
26. ma Consideration should be given that the current value selected is appropriate for the input of the device being connected to this data channel IRIG B 20mA 10mA CH3 RS232 IRIG B CH4 Data Sync FIGURE 3 Option Switches Factory Default Positions 1 6 1 2 7 1 2 8 1 2 9 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL Handshaking Signals With the standard Model 5941D1 and Model 5942D1 handshaking signals can be supported on any combination of channel 2 3 or 4 The standard handshaking signals used on the majority of devices are an RTS CTS pair Request To Send Clear To Send and or a DTR DSR pair Data Terminal Ready Data Set Ready All known combination of handshaking signals can be supported by the low data rate 4K baud channels Optical Ports There are two optical ports T and R The T optical port transmits data signals optically to the next Link The R port receives the optical data signal from another Link s T optical port Each port is fitted with an ST type receptacle for attaching the FOC 9 Pin D Sub Fiber Connector Fiber Connector Connector Pin one FIGURE 4 Optical Ports Diagnostic LEDs Each Model 5941 or Model 5942 Link is equipped with ten diagnostic LEDs Eight of the LED s represent the transmit T and receive R paths for each of the four channels These LEDs when illuminated show that the appropriate path is active pass
27. mes The LEDs may flicker This is normal operation 1 2 10 Power Connections 1 2 10 1 Powering Model 5941 or_Model 5941S Model 5941 or Model 5941S is powered through an external power connector located on the side opposite the optical ports When powering the 5941 via its external connector DYMEC offers a 110 Vac to 12 Vdc adapter Model 4310S Model 4310S assures reliable power over the temperature range of 0 C to 70 C CAUTION The Model 5941 requires 200 mA within a range of 9 to 15 VDC An inadequate power supply not capable of supplying 150 mA over the entire operating temperature range may cause the Link to malfunction CAUTION The Model 5941S requires 250 mA within a range of 9 to 15 VDC An inadequate power supply not capable of supplying 220 mA over the entire operating temperature range may cause the Link to malfunction 1 8 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL 1 2 10 2 Powering the Model 5942 or Model 59425 Model 5942 or 5942S must be powered through the power connector located on the side of the unit The Model 5942 and Model 59425 has an internal regulated power supply that may be connected directly to ac or dc station power The station power may be 90 to 250 Vac 50 60 Hz or 90 to 250 Vdc The station voltage may be unregulated but the circuit must be capable of providing a minimum of 60 mA continuously Model 5942 has a ground stud 46 32 bolt and a power connector on th
28. munication and the other IED s act as Slaves and respond only when specifically polled by the Master Not supported with 5941 or 5942 s 1 1 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL Peer to Peer Loop Configuration More than two Links connected together where the FOC connects the T optical port of one device to the R optical port of the next unit in the loop Each IED has the capability of becoming loop Master as allowed by the controlling software Not supported with 5941 or 5942 s Echo The return of the Master s transmission back to the Master after traveling around the optical loop Optical Bus Configuration More than two Links connected together in a manner where the Master s transmission is heard by all IED s and there is no returning echo of this transmission Not supported with 5941 or 5942 s Optical Star Configuration More than two Links connected together in a hub and spoke topology where the Master s transmission is heard by all IED s and only the Master hears the polled Slave s response and there is no returning echo of the transmissions Not supported with 5941 or 5942 s Master The Master is the IED which controls the loop in a Master Slave loop This IED is responsible for the control of the loop the polling of the Slaves for information and the prevention of data collisions All loop communication is echoed back to and stops at the Master The Master s mode Switch is always in the OFF position Not
29. nel Configuration du wes Ox ef A 2 2 21 2 IRIG B Configuration lll a 2 3 2 1 3 Contact Closer Configuration 2 5 2 1 4 Handshaking Application 2 6 3 Applications 22 2 ex IE oiu ree S dm T 3 1 3 1 Data Rate x do ann ope e a hc e honos RE 3 1 3 2 Optical Budget bs ars at soe a 3 1 3 2 1 Cable Attenuation Factors 3 1 3 3 Powering the Link tutos aug Pink Glades cdi fus Stata ed 3 2 3 3 1 Model 5941 Sa AE Payee are ee DA 3 2 3 3 2 Model5941S 22e 3 2 3 3 8 Model 5942 or Model 59425 aren See Ter 3 3 3 4 Optional Station Power Voltages nn 3 3 3 5 Type of Communication 3 3 3 6 Selection of Fiber Optic Cable 3 3 4 Testing and Troubleshooting i eT EIE 4 1 4 1 Testing 2 heat Eie Wash gig dy Sh Yate tie 4 1 4 2 Troubleshooting 2422s 4 1 5 Specifications 22 32 ee war a ae Pe Oe Rn an ann a 5 1 5 1 Electrical and Optical Specifications 5 1 5 2 Mechanical Dimensions ofthe5941 5 5 5 3 Mechanical Dimensions of the 5942 5 6 6 Ordering Information 6 1 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL INTRODUCTION DYM
30. not re clock or re generate the signal o Review the IED s software and protocols Does the IED have physical handshaking requirements and have the appropriate settings on the IED been made to compensate for these requirements o Consult factory NOTE The LEDs only illuminate when there is signal traffic and are not illuminated during signal quiet times The LEDs may flicker This is normal operation NOTE Links contain no serviceable parts Opening the unit will void the warranty 4 1 5 SPECIFICATIONS 5 1 Electrical and Optical Specifications All Specifications over entire Operating Temperature Range 5941D1 RS232 4 Channel Optical Parameters Optical Budget Typical Output power Typical Receiver Sensitivity Typical Wavelength Connector Type Compatible Fiber Type Configuration Switches Data Rate Data Transmission Transmission Distance Bit Error Rate Point to Point Latency Typical Jitter Typical Electrical Parameters Inputs I O Data Format Data Connector Input Voltage Outputs Output Impedance Driver Output IRIG B Mode Ch 3 Ambient Temperature Operating Temperatures Storage Temperature Power Required Weight Power Dissipation BTU H Dimensions Inches Indicators Multimode 19 5 dB 10 5 dBm peak 30 dBm peak 62 5u 125 Multimode 850nm ST Multi Mode 50 200um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 1 Channel
31. ntil a path to ground becomes available The lowest impedance to ground is recommended to avoid a ground potential rise WARNING When installing a Model 5942 and Model 59425 Link an earth Ground must be attached to the Ground Stud minimum 14 gauge wire up to 5 foot in length on the face of the case before connecting to power Failure to follow this procedure may result in electrical shock to personnel OPTIONAL STATION POWER VOLTAGES Models 5942 and 59428 can be ordered to be powered by 24 to 48 Vdc This modification is indicated by the suffix L added to the Model number i e 5942D1HRT L When ordered with either of these options the unit has that DC voltage rating only and is Surge Withstand Protected to IEC 61000 4 4 61000 4 5 and Standard ANSI IEEE C37 90 1 1989 TYPE OF COMMUNICATION Model 5941 and Model 5942 Links support the following types of asynchronous communications Simplex Transmission only or receive only Half Duplex Sequential transmit and receive Full Duplex Simultaneous transmit and receive SELECTION OF FIBER OPTIC CABLE FOC Fiber optical cable is available in several formats simplex duplex and breakout FOC is also available in various diameters and tensile strengths Tensile strength is important for longer life expectancy Simplex FOC is desirable for loop operations It has one optical conductor and can be connected from the transmitter of one Link to the receiver of the next Link in the loop
32. odel 5942 D4 suffix devices any or all IED s on all 4 channels can have a data rate of up to 64K baud 2 1 3 1 Installation for a Single Channel Contact 1 Connect a relay contact to a channel input pin of the local Link including the current limiting resistor 2 Connect the corresponding channel output of the remote Link to the drive circuitry necessary for the relay contact to be actuated 3 Connect the Fiber Optic Cables T of one device to R of the second device 4 Connect power to the Link as follows a The unit can only be powered through the power connector b Connect power leads to the power connector and then energize the power Source The unit is now powered WARNING When installing a Model 5942 or 59425 Link an Earth Ground must be attached to the Ground Stud minimum 14 gauge wire up to 5 foot in length on the side of the case before connecting to power Failure to follow this procedure may result in electrical shock to personnel 5 The units are now installed and operating 6 Verify operation using the diagnostic LEDs See Figure 5 2 5 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL Voltage Source Voltage Source to Wet Contact to Wet Contact Figure 8 Relay Contact Configuration Single Contact Channel NOTE The Data Channel LEDs only illuminate when there is signal traffic and are not illuminated during signal quiet times The LEDs may flicker This is normal opera
33. odels 5941S and 5942S RS 232 or TTL 8 Verify operation using the diagnostic LEDs See Figure 5 9 If the voltage levels are too low on the IRIG B input pin of the remote IED set the Current Option switch to the 20mA setting on that 5941 or 5942 NOTE The Data LEDs only illuminate when there is signal traffic and are not illuminated during signal quiet times The LEDs may flicker This is normal operation 2 1 3 Contact Configuration A pair of Model 5941 and or Model 5942 s can support up to 4 wet contacts at each end of a pair of fiber strands The direct input voltages from the contacts are limited to 30 Volts if the source contact voltage is greater than 30 volts a dividing resistor or a buffer circuit is required in order not to damage the 5941 or 5942 This dividing resistor must also limit the current to a maximum of 6 mA On the outputs of the Link the drive current is restricted to driving a high impendence load thus if a relay actuator is expected to be driven directly an optical coupler or drive buffer circuitry is required between the output of the Link and the relay actuator so as to not damage the 5941 or 5942 output circuitry see figure 8 For the standard family of the Model 5941 and Model 5942 D1 suffix devices only the IED s connected to channel 1 can have a data rate higher than 4K baud channel 1 only will support device data rates up to a maximum of 64K baud For the extended family of the Model 5941 and M
34. or Type Compatible Fiber Type Configuration Switches Data Rate Data Transmission Transmission Distance Bit Error Rate Point to Point Latency Typical Jitter Typical Electrical Parameters Inputs O Data Format Data Connector Input Voltage Outputs Output Impedance Driver Output IRIG B Mode Ch 3 Ambient Temperature Operating Temperatures Storage Temperature Power Required Weight Power Dissipation BTU H Dimensions Inches Indicators Multimode 19 5 dB 10 5 dBm peak 30 dBm peak 62 5u 125 Multimode 850nm ST Multi Mode 50 200um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 4 Channels Asynchronous simplex Half or Full Duplex up to 5000 meters 62 5u 125 Cable 3dB km 10 E9 Max 25uS All Channels 1uS All Channels ElA RS232 CCITT v24 9 pin D Type Female gt 30000hms 30 Volts Max gt 300 Ohms 5 V min into 3000 Ohms 0 to 2 5V 10mA 0 to 3V 20mA 40 to 85 C 40 to 85 C 2 4 Watts 200 mA 9 15 Vdc 8 Ozs 10 2 BTU 2 0W X 5 14L X 1 25H Power Sync Status Transmit each channel Receive each channel 5941SD4 Single mode 19 dB 14 5 dBm peak 33 5 dBm peak 91 125 Single mode 1310nm ST Single Mode 9 13um CH 3 IRIG B Output Standard CH 3 Drive Current Select CH 4 Sync Indicator Data Out DC to 64K bps 4 Channels Asynchronous simplex Half or Full Duplex 30K meters 91 125 Cable 0 5dB km 10 E9 Max 2545 Al
35. ory with respect to and assumes no responsibility for the accuracy completeness sufficiency or usefulness of the information contained herein No warranties of merchantability or fitness for purpose shall apply Permission is granted to make a reasonable number of copies of this document for the use within an organization that has purchased the equipment Link is used exclusively to describe DYMEC s unique family of Fiber Optic Data Links Table of Contents Page 1 Introduction 1 4 1 4 Definitions Rc EC E 1 1 1 2 Model 5941 and 5942 Links 1 5 1 2 1 9PinDataPortD Connector 1 5 1 2 2 DTE DCE Switch 2 222 1 6 1 2 3 Mode Switch De Pr ES 1 6 1 244 Channel 4 Option Switch a 1 6 1 2 5 Channel 3 Option Switch a pe bete eh ob etn Sk 1 6 1 2 6 Channel 3 Option Switch AA EE o SE 1 6 1 2 7 Handshaking 5 4 ara 1 7 1 2 8 Optical POMS a a bw REED Robe do n 1 7 1 29 Diagnostic LEDs 2 3505 90b Ge inde deus 1 7 1 2 10 Power Connections 22r 1 8 1 2 11 Peripheral Equipment 1 9 2 Configurations Operation and Installation 2 1 2 1 Point to Point Configuration 2 1 2 1 1 4 Chan
36. range of 0 C to 70 C 3 3 2 Model 59415 only Model 59415 can only be powered by means of the power connector located on the side of the unit The unit has an input voltage range of 9 to 15 Vdc at the power connector and requires a maximum of 250 mA over the entire operating temperature range DYMEC s Model 43108 ac to dc power adapter is designed specifically for this purpose It connects directly into a normal 110 volt power receptacle and has an operating temperature range of 0 C to 70 C 3 2 The distance 3 4 3 5 3 6 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL 3 3 3 Model 5942 or Model 5942S Model 5942 or Model 59425 is designed with an internal universal regulated power supply for environments where unregulated ac or dc voltages are available It accepts ac voltages in a range of 90 to 250 volts 50 or 60 hertz or dc voltages in a range of 90 to 250 volts These power sources must be capable of supplying 60 mA over the entire operating range NOTE The Model 5942 can be ordered to accommodate 24 to 48 Vdc power Model 5942 or Model 59425 is provided with a ground stud on the side of the case An appropriate earth ground minimum 14 gauge wire up to 5 foot in length must be connected to this stud before power is applied to the unit The internal surge withstand protection inside of the unit uses this ground stud as a sink for power surges If the unit is not properly grounded it may store a charge u
37. result in electrical shock to personnel 2 7 Models 5941 and 5942 Models 59415 and 59425 RS 232 or TTL 5 The units are now installed and operating 6 Verify operation using the diagnostic LEDs See Figure 5 2 8 3 1 3 2 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL APPLICATIONS When planning a system using Model 5941 and Model 5942 Links the following considerations should be reviewed Data Rate Optical Budget and the distance between connected units Powering the Links Type of communication including format Selection of Fiber Optic Cable FOC DATA RATE Model 5941 and Model 5942 Links automatically support all data rates from DC levels to 64 Kilobits per second No internal selection nor setting is required However it is necessary that all connected IED s on a particular channel be set at the same data rate OPTICAL BUDGET The optical budget is a ratio of the receiver sensitivity to launched optical power e amount of light loss available from the transmitter to the receiver It is calculated on a log scale so that a 3 dB loss is equal to half of the original power 10 dB is one tenth of the original power 20 dB is one hundredth etc Many different elements in the optical circuit can induce losses to the power of the signal This attenuation must be taken into account when determining the distance that the signal can be transmitted The major factor is the attenuation of the fiber optic c
38. suffix devices any or all IED s on all 4 channels can have a data rate of up to 64K baud 2 1 1 1 Installation for a Single Channel 1 Connect a channel transmit and receive pins of the Link to the IED s RS 232 communication port including the adapter repeat these connections for each additional channel used Pin 5 signal common is shared for all device channels 2 Connect the Fiber Optic Cables T of one device to of the second device 3 Connect power to the Link as follows a The unit can only be powered through the power connector b Connect power leads to the power connector and then energize the power source The unit is now powered 2 2 Models 5941 and 5942 Models 5941S and 5942S RS 232 or TTL WARNING When installing a Model 5942 or 59425 Link an earth Ground must be attached to the Ground Stud minimum 14 gauge wire up to 5 foot in length on the side of the case before connecting to power Failure to follow this procedure may result in electrical shock to personnel 4 The units are now installed and operating 5 Verify operation using the diagnostic LEDs See Figure 5 NOTE The Data Channel LEDs only illuminate when there is signal traffic and are not illuminated during signal quiet times The LEDs may flicker This is normal operation 2 1 2 IRIG B Configuration The Model 5941 and Model 5942 can support an unmodulated RS232 IRIG B signal on channel 3 see Figure 7 Any remote IED that r
39. tion 2 1 4 Handshaking Configuration A pair of Model 5941 and or Model 5942 s can support hardware handshaking between 2 RS232 IED s Channel 1 of the Links should be reserved for Data transmission as this would require the highest speed channel The Handshaking signals are switching at a much lower data rate thus the 3 additional channels of the D1 family of links will have enough bandwidth to cover these requirements Hardware handshaking covers 3 popular implementation methods the most popular implementation uses RTS Request To Send and CTS Clear to Send signals RTS is connected to CTS on the device on the other end of the fiber RTS is sent by the transmitting device asking if the receiving device is ready to accept data CTS is the receiving devices acknowledgement that it is ready to receive data and these signals are held in the active state until all data is sent Channel 2 3 or 4 can be chosen to be used for the handshaking signals see Figure 9 The second implementation method uses the DTR Data Terminal Ready on the receiving IED and DSR Data Set Ready on the transmitting IED signals These signals perform the same functions as the previous example and can be connected via the other 3 channels as shown in Figure 9 The third implementation is the one that is described in the RS232 standard and uses both sets of signals RTS CTS DTR DSR The DTR DSR signal pair is used to signal device status and RTS CTS is used for Data traff
40. tions and direct burial underground burial lashed and building riser Connector and Complete Assembly Tested XXXX the length of the fiber optic cable in Meters note order only in full meters and not a fraction thereof 1 Meter 3 281 Feet 9 C 25 Commerce Way 1 North Andover MA 01845 978 688 8807 FAX 978 688 8771 6 d C 0 m www garrettcom com Industrial Networking at Its Best 6 1 READER S COMMENTS We invite your comments and welcome suggestions to make this manual more useful Bulletin Rev Today s Date GENERAL COMMENTS Improve Acceptable Good Excellent Contents E Organization E Accuracy E LI Clarity E E LI Completeness E E Example lllustrations Referencing Indexing E LI Readability E O DETAILED COMMENTS Please be specific i e correct expand etc U fo 2 q 3 Comments Other suggestions for improving this document Compared to other manufacturers of a similar product how would you rate this document Superior Comparable Inferior Don t Know Comments Comments concerning your specific application Telephone FAX Please FAX or mail this sheet to the address listed below Attn Document Supervisor 25 Commerce Way 1 North Andover MA 01845 978 688 8807 FAX 978 688 8771 GarrettC om www garrettcom com Industrial Networking at Its Best
41. ts per RS 232 and TTL standards CAUTION Although the Dymec Links can recognize TTL levels on its inputs the RS232 standard output voltages will damage TTL input pins as the RS232 standard calls for negative voltage levels beyond the specifications for TTL inputs RS 232 data communication signals are always paired A transmit and receive pin is assigned to each channel on the 9 pin D connector When the Link has a high TTL potential above 2 0 volts on its receive pin it will transmit optically All signal voltage levels on the 9 pin D connector are referenced to pin 5 Signal Common of the D connector POINT TO POINT CONFIGURATION For Point to Point operation two Links are optically connected to each other This configuration permits full duplex communication simultaneous transmitting and receiving half duplex communication sequential transmitting and receiving and simplex transmitting or receiving only Point to Point configurations are the only applications supported by the design of the Model 5941 and 5942 Links CAUTION Dymec does not recommend copper cable distances exceed 3 meters 10 Feet to any single device connected to the Model 5941 or Model 5942 This restriction is imposed to minimize the potential for noise adversely affecting the signal quality before it is converted to Optical APPLICATION NOTE In Point to Point operation the communication logic control software of the IED s must manage

Price: $25 US

Contents

Download Pdf Manuals

Related Search

Related Contents