USER MANUAL
Contents
1. 4 4 CONNECTION TO THE TERMINAL DEVICE The Model 2703RC rear cards are wired as Data Circuit Terminating Equipment DCE and are designed to connect directly to Data Terminal Equipment DTE Notice Any terminal cable connected to the Model 2703RC must be shielded cable and the outer shield must be 360 degree bonded at both ends to a metal or metalized backshell 4 4 1 EIA 530 RS422 V 36 and V 35 TERMINAL CONNECTION The DB25 connector of the Model 1000RCM703120 rear card is configured as DCE see the wiring diagram in Appendix C To con nect to a V 35 or RS 422 V 36 DTE device use a_ straight through DB 25 cable NOTE The 120 ohm rear card must be set for non synchro nized clocking See Section 3 2 1 in order to support the EIA 530 or V 35 interfaces 4 4 2 X 21 TERMINAL CONNECTION The DB15 connector of the Model 2703RC is equipped with a female DB 15 connector and is wired according to the ITU CCITT X 21 standard see the wiring diagram in Appendix C To connect to to an X 21 terminal DTE use a straight through DB 15 cable Note The 120 ohm rear card can also be used with X 21 terminal devices To do this the card must be set for synchronized clocking See Section 3 2 1 a DB 25 to DB 15 adapter cable must be used See Appendix B for the adapter cable part numbers Or you may construct your own cable using the diagrams in Appendix C 15 5 0 OPERATION Once you have configured each Model 2703RC and c2. ohm resistor This connection is recommended in the ElA 530 specifi cation as a current limiter for ground fault events LK5 Setting Strap On SGND to FGND Connection Made Strap Off SGND to FGND Connection Broken 3 2 2 CONFIGURING THE MODEL 1000RCM70375 REAR CARD The Model 1000RCM70375 DB15 Coax Ohm rear card has two configuration jumpers LK1 amp LK2 Figure 5 below shows the loca tions of the jumpers on the 75 Ohm rear card LK1 LK2 Figure 5 Jumper Locations for the Model 1000RCM70375 Rear Card 10 The table below shows the factory default jumper settings for the 75 ohm rear card Following the table is a description of each jumper s function and possible settings When configuring the jumpers take care not to lose the individual straps 75 OHM REAR CARD JUMPERS Function RX Shield to GND LK2 DTE SGND to FGND Factory Default Strap Off Strap On Jumper LK1 Receive Shield to Ground Connection This setting determines whether or not the RX shield is connected to earth ground This connection may help EMC performance in some cases LK1 Setting Strap On RX Shield to GND Connection Made Strap Off RX Shield to GND Connection Broken LK2 DTE Signal Ground to Frame Ground with Resistor This setting determines whether or not the DTE signal ground DB 15 pin 8 is connected to frame ground pin 1 by way of a 100 ohm resistor This connection is recommended as a cu
3. equipment indicates that it is in compliance with the Electromagnetic Compatibility EMC directive and the Low Voltage Directive LVD of the Union European EU A Certificate of Compliance is available by contacting Technical Support 1 3 SERVICE All warranty and nonwarranty repairs must be returned freight pre paid and insured to Patton Electronics All returns must have a Return Materials Authorization number on the outside of the shipping contain er This number may be obtained from Patton Electronics Technical Support 301 975 1007 htip www patton com or support pat ton com NOTE Packages received without an RMA number will not be accepted Patton Electronics technical staff is also available to answer any questions that might arise concerning the installation or use of your Model 2703RC Technical Service hours 8AM to 5PM EST Monday through Friday 2 0 GENERAL INFORMATION Thank you for your purchase of this Patton Electronics product This product has been thoroughly inspected by Patton s qualified tech nicians If any questions or problems arise during installation or use of this product please do not hesitate to contact Patton Electronics Technical Support at 301 975 1007 2 1 FEATURES e Synchronous network data rate of 2 048 Mbps e Four Selectable DTE Rates 256 512 1024 and 2048 Mbps EIA 530 V 36 EIA 422 Electrical V 35 or X 21 terminal interfaces 120 ohm twisted pair or 75 ohm coax
4. the network Switches S7 and S8 Reserved for Future Use Switches S7 and S8 are reserved for future use and must remain in the Off position 3 1 1 Interface Driver Board The Model 2703RC Series features changeable Interface Driver Boards that allow a wide range of DTE interface connections Supported interfaces are V 35 EIA 530 and X 21 The Interface Driver Board plugs onto a 40 pin header 2 rows of 20 pins on the top side of the 2703RC PC board See Figure 3 below I L I lt FRONT THIS SIDE UP FOR V 35 Figure 3 Closeup of Model 2703RC Interface Drive Board Your 2703RC comes with an Interface Driver Board already mount ed on the board If you wish to change the electrical interface of the 2703RC you must change the Interface Driver Board See Appendix B for Model Numbers Follow the instructions below to change the Interface Driver Board 1 With the 2703RC pulled out of the rack or clusterbox chassis locate the driver board on the top of the 2703RC front card 2 Lift the interface board gently off of the PC board 3 Locate the correct interface on the bottom of the driver board For example V 35 interface board is marked THIS SIDE UP FOR V 35 on one side of the board other side 4 Plug the interface board into the 20 pin header socket with the appropriate interface pointed UP and with the arrow pointing toward the front panel of the Model 2703RC PC board 5 Push the Interface Drive
5. Burton A Patton Vice President P S Please tell us where you purchased this product TS Ld An ISO 9001 Certified Company USER MANUAL MODEL 2703RC MegaLink 1 G 703 E1 Digital Modem Rack Mount Card Part 07M2703RC C Doc 031121UC Revised 10 12 98 E PATTON TE Blecironics To SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com 1 0 WARRANTY INFORMATION Patton Electronics warrants all Model 2703RC components to be free from defects and will at our option repair or replace the product should it fail within one year from the first date of shipment This warranty is limited to defects in workmanship or materials and does not cover customer damage abuse or unauthorized modifica tion If this product fails or does not perform as warranted your sole recourse shall be repair or replacement as described above Under no condition shall Patton Electronics be liable for any damages incurred by the use of this product These damages include but are not limited to the following lost profits lost savings and incidental or consequen tial damages arising from the use of or inability to use this product Patton Electronics specifically disclaims all other warranties expressed or implied and the installation or use of this product shall be deemed an acceptance of these terms by the user 1 1 RADIO AND TV INTERFERENCE The Model 2703RC generates and uses r
6. Dear Valued Customer Thank you for purchasing Patton Electronics products We do appreciate your business I trust that you find this user manual helpful We manufacture one of the widest selections of data communica tions products in the world including CSU DSU s network termination units powered and self powered short range modems fiber optic modems interface converters baluns electronic data switches data line surge protectors multi plexers transceivers hubs print servers and much more We produce these products at our Gaithersburg MD USA facility and can custom manufacture products for your unique needs We would like to hear from you Please contact us in any of the fol lowing ways to tell us how you like this product and how we can meet your product needs today and in the future Web http www patton com Sales E mail sales patton com Support E mail support patton com Phone Sales 301 975 1000 Phone Support 301 975 1007 Fax 301 869 9293 Mail Patton Electronics Company 7622 Rickenbacker Drive Gaithersburg MD 20879 USA We are committed to a quality product at a quality price Patton Electronics is BABT and ISO 9001 certified We meet and exceed the highest standards in the industry CE UL etc It is our business to serve you If you are not satisfied with any aspect of this product or the service provided from Patton Electronics or its distributors please let us know Thank you
7. ECTION TO THE G 703 NETWORK The Model 2703RC supports 2 048 Mbps communication over an unstructured G 703 network Both 120 ohm and 75 ohm interface cards are available see Figure 7 below RJ 45 120 Ohm Fs TX Dual BNC 75 Ohm b RX Fa ea DB 25 Female i 2a P P Bt P DB 15 Female JA a E a bd a za i Model Model 1000RCM703120 1000RCM70375 Figure 7 Rear interface card options for the Model 2703RC 4 3 1 TWISTED PAIR 120 OHM CONNECTION The Model 2703RC DB25 R45 rear card Model 1000RCM703120 is equipped with a single RJ 45 jack for connection to a 120 ohm twist ed pair G 703 network interface The pinout of this jack is as follows RJ 45 Pins SIGNAL E EEEE Receive pair from network Beake a i Shield reference point Oe re Transmit pair to network Or ynan aen tapes Shield reference point Toata Oe a ET Sa Not used Notice Any modular twisted pair cable connected to the rear card must be shielded cable and the outer shield must be properly terminated to a shielded modular plug on both ends of the cable 14 4 3 2 DUAL COAX BNC 75 OHM CONNECTION The Model 2703RC DB15 Coax rear card is equipped with dual female BNCs TX and RX for connection to a 75 ohm dual coax G 703 network interface The outer conductor of the coax cables is isolated from system earth ground Notice Any coaxial cable connected to the dual coax rear card must incorporate an outer shield that has no less than 90 coverage
8. Patton Electronics Company 7622 Rickenbacker Drive Gaithersburg MD 20879 USA We are committed to a quality product at a quality price Patton Electronics is BABT and ISO 9001 certified We meet and exceed the highest standards in the industry CE UL etc It is our business to serve you If you are not satisfied with any aspect of this product or the service provided from Patton Electronics or its distributors please let us know Thank you Burton A Patton Vice President P S Please tell us where you purchased this product
9. adio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio and television reception The Model 2703RC has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection from such interference in a commercial installation However there is no guarantee that interfer ence will not occur in a particular installation If the Model 2703RC does cause interference to radio or television reception which can be determined by turning the power off or removing the card the user is encouraged to try to correct the interference by one or more of the fol lowing measures moving the computing equipment away from the receiver re orienting the receiving antenna and or plugging the receiv ing equipment into a different AC outlet such that the computing equip ment and receiver are on different branches In the event the user detects intermittent or continuous product malfunction due to nearby high power transmitting radio frequency equipment the user is strongly advised to take the following steps use only data cables with an exter nal outer shield bonded to a metal or metalized connector and Configure the rear card as shown in section 3 2 of this manual 1 2 CE NOTICE The CE symbol on your Patton Electronics
10. ansmit Clock A RD Receive Data RC Receiver Clock LLB Local Line Loop RTS Request to Send DTR Data Terminal Ready RDL Remote Digital Loop DSR Data Set Ready DTR Data Terminal Ready XTC External Transmit Clock TM Test Mode Copyright 1998 Patton Electronics Company All Rights Reserved 22 Source DTE DCE DTE DCE DCE DCE DCE DCE DTE DCE DCE DTE DCE DCE DCE DTE DTE DTE DTE DCE DTE DTE DTE Dear Valued Customer Thank you for purchasing Patton Electronics products We do appreciate your business I trust that you find this user manual helpful We manufacture one of the widest selections of data communications products in the world including CSU DSU s network termination units pow ered and self powered short range modems fiber optic modems interface con verters baluns electronic data switches data line surge protectors multiplex ers transceivers hubs print servers and much more We produce these prod ucts at our Gaithersburg MD USA facility and can custom manufacture products for your unique needs We would like to hear from you Please contact us in any of the following ways to tell us how you like this product and how we can meet your product needs today and in the future Web http www patton com Sales E mail sales patton com Support E mail support patton com Phone Sales 301 975 1000 Phone Support 301 975 1007 Fax 301 869 9293 Mail
11. ection to Model 1000R16 rack chassis via 50 pin male card edge 256 512 1024 2048 kbps Loopback Test LEDs for power network master clock and loopback test Master Internal Slave Recovered from the G 703 Network 10 dB 0dB 2 4V Peak 0 60 C 32 140 F 0 15 000 feet 5 to 95 noncondensing 0 95 W x 3 1 H x 5 4 L 0 95 W x 3 1 H x 2 8 L 18 APPENDIX B APPENDIX C MODEL 2703RC FACTORY REPLACEMENT PARTS MODEL 2703RC INTERFACE STANDARDS The Patton Model 2703RC rack system features interchangeable X 21 Interface rear cards power cords fuses for international various operating envi DB 15 Female Connector ronments and other user replaceable parts Model numbers descrip tions and prices for these parts are listed below DB15 Female Patton Model Description 1OOORPEM 0 0000000 120 240V Rear Power Entry Module Pin Signal Source 1OOORPSM ccereeeees 120 240V Front Power Supply Module 1000RPEM DC 0 DC Rear Power Entry Module 1 Shield 1000RPSM 48A eee 48V Front Power Supply Module 2 Transmit a DTE 1000RPEM V 00 120 240V CE Compliant Rear Power 3 Control a DTE Entry Module 4 Receive a DCE 1000RPSM V c0e 120 240V CE Compliant Front Power 5 Indication a DCE Supply Module 6 System Clock a DCE 7 1000RCM703120 EIA 530 RJ45 120 Ohm Rear Card 8 Signal Ground 1000RCM70375 X 21 Dual Coaxial 75 Ohm Rear Card 9 Transmit b DTE 10 Cont
12. eturned back to the user device For example char acters typed on the keyboard of a terminal will appear on the terminal screen To perform a LAL test follow these steps A Activate LAL by moving the front panel toggle switch UP and holding it in the Loopback mode The Loop LED should glow Once LAL is activated the Model 2703RC transmit output is connected to its own receiver Note The front panel switch is spring loaded so it will return to Normal operating mode when pressure is released B Verify that the data terminal equipment is operating properly and can be used for a test If a fault is indicated call a technician or replace the unit C Perform a BER bit error rate test on each unit If the BER test equipment indicates no faults but the data terminal indi cates a fault follow the manufacturer s checkout procedures for the data terminal Also check the interface cable between the terminal and the Model 2703RC 17 APPENDIX A MODEL 2703RC SPECIFICATIONS Network Interface Network Rate Network Connectors Terminal Interface Internal Interface Terminal Rate Diagnostics Indicators Clocking Receiver Sensitivity Temperature Range Altitude Humidity Front Card Dimensions Rear Card Dimensions G 703 2 048 Mbps Two BNC 75 Ohm or one modu lar RJ 45 connector 120 Ohm EIA 530 RS 422 V 36 or V 35 on DB 25 female or ITU CCITT X 21 on DB 15 female Conn
13. function card and a rear interface card Each may require config uration depending upon the product application This section describes the location and orientation of the Model 2703RC s configuration switches and jumpers and provides descriptions for all settings 3 1 FRONT CARD CONFIGURATION The Model 2703RC front card has a single bank of eight DIP switches located on the top of the printed circuit board Figure 1 below shows the position of the switches on the board DIP Switch a Figure 1 Model 2703RC board showing jumper locations Changing the DIP Switch Settings Figure 2 shows the orientation of the DIP switches with respect to the ON and OFF positions Front Panel lt lt ex OFF lt Figure 2 Close up of the configuration switches NOTE The OFF position is oriented toward the front of the Model 2703RC 4 3 1 DIP Switches S1 S8 The configuration switches on S1 S8 may be used to set data inversion the DTE bit rate and clocking modes Default settings of S1 through S8 are shown in the table below Descriptions of each switch follow the table SWITCH SUMMARY TABLE Position Function Factory Default S1 Data Inversion Off Non Inverted S2 Rate Adaptation DTE Rate Off 2 048 Mbps 3 Rate Adaptation DTE Rate Off S4 Off s5 Reserved off S6 Clock Mode Off Network oh Reserved ott S8 Off Switch S1 Data Inversion Set Switc
14. h S1 to determine whether or not the data stream from the local DTE is inverted within the Model 2703RC before being passed to the G 703 network You may need to invert the data stream when you use the Model 2703RC with an imbedded G 703 device that inverts the data on the remote end Data inversion is typically not nec essary S1 1 Setting On Data inverted Off Data not inverted NOTE The PCM data stream must be inverted if this Model 2703RC is to be connected to a standalone Model 2703 Firmware Revision B or older unit at 256 512 and 1024 kbps The firmware version of the standalone 2703 is printed on the bottom side of the unit Switches S2 and S3 Rate Adaptation DTE Rate Set Switches S2 and S3 together to allow the Model 2703 to adapt to terminal devices that run at data rates less than 2 048 Mbps The network rate remains 2 048 Mbps regardless of the terminal rate adaptation setting The setting you select must match the data rate of your terminal device S2 S3 Setting Off Off 2 048 Mbps On Off 1 024 Mbps Off On 512 Kbps On On 256 Kbps Switches S4 and S5 Reserved for Future Use Switches S4 and S5 are reserved for future use and must remain in the Off position Switch S6 Internal Network Clock Set Switch S6 to allow the Model 2703RC to provide an internal clock or recover the clock from the received G 703 input signal S6 Setting On Model 2703RC clock is internal Off Model 2703RC clock is recovered from
15. he Power Supply On and Off The power supply on off switch is located on the front panel When plugged in and switched on a red front panel LED will glow Since the Model 1000R16 is a hot swappable rack it is not neces sary for any cards to be installed before switching on the power supply The power supply may be switched off at any time without harming the installed cards NOTE Please refer to the Model 1000RP Series User Manual AC and DC Rack Mount Power Supplies for fuse and power card replacement information 4 2 INSTALLING THE MODEL 2703RC INTO THE CHASSIS The Model 2703RC is comprised of a front card and a rear card The two cards meet inside the rack chassis and plug into each other by way of mating 50 pin card edge connectors Use the following steps as a guideline for installing each Model 2703RC into the rack chassis 1 Slide the rear card into the back of the chassis along the metal rails provided Secure the rear card using the metal screws provided Slide the card into the front of the chassis It should meet the rear card when it s almost all the way into the chassis 4 Push the front card gently into the card edge receptacle of the rear card It should click into place 5 Secure the front card using the thumb screws NOTE Since the Model 1000R16 chassis allows hot swapping of cards it is not necessary to power down the rack when you install or remove a Model 2703RC 13 4 3 CONN
16. network terminations e Master and Slave network clocking e Built in local loopback test e Front panel LED indicators for power network master clock and test loop e Mounts in Patton s 16 slot rack chassis and 2 4 8 slot Cluster Boxes Made in the U S A 2 2 DESCRIPTION The Patton MegaLink Model 2703RC G 703 E1rack card modem receives unstructured synchronous 2 048 Mbps data from a G 703 net work and sends it to a router bridge multiplexer or other device The Model 2703RC is available with two interface options 120 Ohm twisted pair to the network with EIA 530 V 36 EIA 422 or V 35 utilizing a 25 pin connector to the terminal or 75 Ohm dual coax to the network with X 21 to the terminal An additional feature allows the EIA 530 terminal interface to be adapted to X 21 using a special DTE cable available from Patton The Model 2703RC is designed to mount in Patton s 2U high 16 slot rack chassis or 2 4 8 slot Cluster Boxes These have a switchable 120 240 VAC power supply optional 48 VDC and mount cards in a mid plane architecture front function cards and rear interface cards can be hot swapped independently providing great flexibility The Model 2703RC supports Internal master and Network slave clock ing Loopback test is built in and front panel LEDs monitor power net work master clock and test loop 3 0 CONFIGURATION Two cards make up a single Model 2703RC G 703 Converter a front
17. onnected the cables you are ready to operate the units Section 5 0 describes the power up procedure LED status indicators and the built in loopback test modes 5 1 POWER UP There is no power switch on the Model 2703RC Power is auto matically applied to the Model 2703RC when its card edge connector makes contact with the chassis mid plane socket and when the chas sis power supply is turned on Note The Model 2703RC is a hot swappable card it will not be damaged by plugging it in or removing it while the rack is powered up 5 2 LED STATUS MONITORS The Model 2703RC features four front panel LEDs that monitor and power network connection master clock and loopback Figure 8 below shows the front panel location of each LED Following Figure 7 is a description of each LED s function Figure 8 Model 2703RC front panel showing LED indicators Power Glows red when the Model 2703RC receives oper ational power Network Glows green when the Model 2703RC is receiving correctly encoded data from the line interface equipment Master Clock Glows green when the Model 2703RC is configured as the master clock unit Loopback Glows green when the Model 2703RC is in loopback mode 16 5 3 LOOPBACK TEST LAL The Model 2703RC is equipped with a Local Analog Loopback LAL mode to assist in evaluating the operation of the local Model 2703RC Any data sent to the local Model 2703RC in this test mode will be echoed r
18. r Board gently onto the socket and re install into the rack or cluster system 7 3 2 REAR CARD CONFIGURATION The Model 2703RC has two rear interface card options 1 Model 1000RCM703120 120 Ohm modular network and female DB 25 terminal Supports V 35 and V 36 EIA 422 2 Model 1000RCM70375 75 ohm dual BNC network and female DB 15 terminal Please refer to the instructions below to configure the rear cards 3 2 1 CONFIGURING THE 1000RCM703120 REAR CARD The Model 1000RCM120 DB25 RJ45 Ohm rear card has five con figuration jumpers LK1 LK5 Figure 4 below shows the locations of the jumpers on the 120 Ohm rear card LK3 LK2 k1 LK4 DB 25 Connector LK5 Figure 4 Jumper Locations for the Model 1000RCM703120 Rear Card The table below shows the factory default jumper settings for the Model 1000RCM703120 DB25 RUJ 45 rear card Following the table is a description of each jumper s function and possible settings When configuring the jumpers take care not to lose the individual straps 120 OHM REAR CARD JUMPERS Jumper Function Factory Default iki RXPin2tcGND lt zCOS d SSC StraspHSCd LK2 RX Shield Pin 3 to GND Strap Off LK3 TX Pin 4 to GND Strap Off LK4 Clock Synchronization Strap Off LK5 DTE SGND to FGND Strap On LK1 Receive Pair Pin 2 to Ground Connection This setting determines whether or not pin 2 of the receive pair is sent to earth g
19. rol b DTE 0805US vic een American Power Cord 11 Receive b DCE O805EUR ccccceeeeeeees European Power Cord CEE 7 12 Indication b DCE O805UK a CE United Kingdom Power Cord 13 System Clock b DCE O805AUS E E Australia New Zealand Power Cord 14 S O805DEN 2ccceeeeeeees Denmark Power Cord 15 z z 0805FR aiik agai France Belgium Power Cord OB805IN cccceessssstseeeeeees India Power Cord OB05ISi ti Israel Power Cord OB805UAP eeeeeeeteeeenteerees Japan Power Cord O805SW AEE Switzerland Power Cord O516FPB1 oriri Single Width Blank Front Panel O516FPB4 ninica 4 Wide Blank Front Panel O516RPB1 eee eee Single Width Blank Rear Panel O516RPB4 c cc ceseeeees 4 Wide Blank Rear Panel 05691 eat Sas Set of 16 4 pan head screws washers 10 25M 15F 1 0 eeeeeeeeeee Cable 6ft DB 25 male to DB 15 female 10 25M 35F 1 ceeeeee Cable 6ft DB 25 male to M 34 female 10 25M 35M 1 cceeee Cable 6ft DB 25 male to M 34 male 20 21 5 OONDOOARWD APPENDIX C MODEL 2703RC INTERFACE STANDARDS EIA 530 amp V 35 Interface DB25 Female Connector Signal FG Frame Ground TD Transmit Data RD Receive Data RTS Request to Send CTS Clear to Send DSR Data Set Ready SGND Signal Ground CD Carrier Detect RC Receiver Clock B CD Carrier Detect B XTC External Transmit Clock TC Transmit Clock B CTS Clear to Send TD Transmit Data B TC Tr
20. round This connection should not be made in most cases LK1 Setting Strap On Pin 2 to GND Connection Made Strap Off Pin 2 to GND Connection Broken LK2 Receive Shield Pin 3 to Ground Connection This setting determines whether or not the RX shield pin 3 is connected to earth ground This connection may help EMC perform ance in some cases LK2 Setting Strap On Pin 3 to GND Connection Made Strap Off Pin 3 to GND Connection Broken LK3 Transmit Pair Pin 4 to Ground Connection This setting determines whether or not pin 4 of the transmit pair is sent to earth ground This connection should not be made in most cases LK3 Setting Strap On Pin 4 to GND Connection Made Strap Off Pin 4 to GND Connection Broken LK4 Clock Synchronization EIA 530 V 35 vs X 21 This setting determines whether clocks are common or separate Separate non synchronized clocks are used for the EIA 530 V 35 ter minal interface Common synchronized clocks are used for the X 21 terminal interface If clocks are synchronized a DB 25 to DB 15 adapter cable should be used between the Model 2703RC and the X 21 terminal device see Appendix B and Appendix C for details LK4 Setting Strap On Clocks Synchronized X 21 Strap Off Clocks not Synchronized EIA 530 and V 35 LK5 DTE Signal Ground to Frame Ground with Resistor This setting determines whether or not the DTE signal ground DB 25 pin 7 is connected to frame ground pin 1 by way of a 100
21. rrent limiter for ground fault events LK2 Setting Strap On SGND to FGND Connection Made Strap Off SGND to FGND Connection Broken 11 4 0 INSTALLATION This section describes the functions of the Model 1000R16 rack chassis tells how to install front and rear Model 2703RC cards into the chassis and provides diagrams for wiring the interface connections correctly 4 1 THE MODEL 1000R16 RACK CHASSIS The Model 1000R16 Rack Chassis Figure 6 below has sixteen device card slots plus its own power supply Measuring only 3 5 high the Model 1000R16 is designed to occupy only 2U in a 19 rack Sturdy front handles allow the Model 1000R16 to be extracted and transported conveniently Figure 6 Model 1000R16 Rack Chassis with power supply 4 1 1 THE RACK POWER SUPPLY The power supply included in the Model 1000R16 rack uses the same mid plane architecture as the modem cards The front card of the power supply slides in from the front and the rear card slides in from the rear They plug into one another in the middle of the rack The front card is then secured by thumb screws and the rear card by conventional metal screws WARNING There are no user serviceable parts in the power supply section of the Model 2703RC Voltage set ting changes and fuse replacement should only be per formed by qualified service personnel Contact Patton Electronics Technical support at 301 975 1007 for more information 12 Switching t
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