2-wire RS-485 Quick Installation
Contents
1. TC1520 is in RS 485 mode When LED is off TC1520 is in RS 422 mode Optic sync indicators Flashing Optic signal lost or below optic receiver s sensitivity On Optic signal is present at pertinent channel A or B Actual logic status on IN terminals When voltage on is higher than the LED is off When voltage on is lower than the LED is on TC1520 User s Manual Rev 6 7 Theory of 2 Wire RS 485 Operation transition control Fiber cable RS 485 DRV RCV Driver Tx Rx Data IN amp RS 485 Tx Rx Data IN Tx Rx Data IN Receiver Driver Tx Rx Data IN amp DRV RCV Receiver transition control 2 wire RS 485 is half duplex operation which means transmit and receive operations take turns they do not operate concurrently From the user s point of view the channel is in receiving mode when no data is transmitted from the remote unit The local RS 485 transceiver will change to transmitting mode Tx mode upon receiving the first bit of data from remote unit The local RS 485 transceiver will stay in Tx mode until a predetermined period set by front panel switch CLK1 CLK2 elapses after the last bit from the remote unit The following table provides the setting of the front panel DIP switches which determine the elapsed period after the last bit of the data stream s received from remote unit The listed baud rates is only for reference The best result2. to user s device lt not used for 2 wire RS 485 wa connect to user s device Hot PWR O Made in U S A TC COMMUNICATIONS C FIBER OPTIC CONNECTIVITY Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM IN TRM pe 0PTIC s Tx Rx TC1520 User s Manual Rev 6 7 Switch Functions CLK1 CLK2 two switches marked as CLK1 CLK2 are for RS 485 s transition time setup If both switches are at up position then IN and OUT terminals are setup to RS 422 s applications If both or any of CLK1 and CLK2 is set to down position the electrical interface is set to RS 485 applications IN TRM OUT TRM The other two switches marked as IN TRM and OUT TRM are used for termination resistors IN TRM is for input termination and OUT TRM is for output termination CLK1 CLK2 RS 422 only Polo NO anas bangan ep ro 1 4 2 wire RS 485 for baud rate gt 25 kbps 4 2 wire RS 485 for baud rate gt 250 kbps 0 UP 1 DOWN Transmission Distances typical The TC1520 is compatible with all popular sizes and types of fiber Transmission distances up to 3km are typical over Multimode fiber at 850nm and 4km at 1310nm Distances to 33km are typical over Single Mode fiber at 1310nm Launch Power amp Sensitivity Transmitter LED ELED typical Launch Power 20dB m 850nm 1310nm MM 62 5 125m 16dB m 1310nm Single Mode
3. Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM IN TRM r OPTIC gy Tx Rx Made in U S A IC TC COMMUNICATIONS FIBER OPTIC CONNECTIVITY Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM IN TRM CLK2 9 14V id DC po OPTIC ig RS 530 DB25 Connector DTE 12 TC1520 User s Manual Rev 6 7 Connect to a BERT Tester with RS 449 for 2 wire RS 485 Testing 2 wire RS 485 Quick Installation local amp remote Units Set Tester to DTE device PWR O O O O O O Made in U S A oky phi IC TC COMMUNICATIONS i OPE SYN FIBER OPTIC CONNECTIVITY 5 Model TC1520 RS 422 485 4 2 WIRE ASYNC IBER OPTIC MODEM OUT TRM p7 OPTIC a Made in U S A FC neo Model TC1 520 NOT USED RS 422 485 4 2 WIRE ASYNC FIB ER OPTIC MODEM SIG GND OUT TRM IN TRM FRM GND CLK2 pm OPTIC oe Tx Rx RS 449 DB37 Connector DTE 245 TC1520 User s Manual Chapter 3 Specifications _ Data Rates ASYNC wie nee neni up to 500kbps Optical Transmitter vo LED ELED Receiver ua PIN Wavelength LL 850nm 1300nm multimode PAA 1300nm 1550nm single mode Fiber Optic connectors ua ST FC optional Loss Budget AA ATA TE 15 dB multimode 850nm 1300nm 62 5 im saa 20 dB single mode 1300nm 9 Um Electrical Connector Lua Terminal Blocks Interface La RS 422 or 4 2 wire RS 485 ST is a trademark of AT amp T check factory for las
4. 9 125m Receiver PIN Diode typical Sensitivity 36dB m 850nm 1310nm MM 62 5 125ym 36dB m 1310nm Single Mode 9 125m Launch power sensitivity and distance are listed for reference only These numbers may vary Power Supply Typically a 9V to 14V DC power supply 200mA is adequate for the TC1520 optional 115 230V AC with an external power cube The power plug is a terminal block connector with positive amp negative polarity indicated on the top panel of the unit TC1520 User s Manual Rev 6 7 LED Functions There are six LED indicators to ease installation and troubleshooting Users can monitor optic signal status RS 422 RS 485 signal status at IN and OUT terminals distinguish RS 422 RS 485 mode or identify drive or receive mode at OUT terminals The TD LED is the status on IN terminals RD LED is the status on OUT terminals For RS 485 applications drive mode and receive mode for OUT terminals is indicated by DRV MODE LED The RS 485 transceiver status for OUT terminals When LED is on OUT terminals are in drive mode When LED is off OUT terminals are in receive mode Actual logic status on OUT terminals When LED is off output voltage on is higher than When LED is on output voltage on is lower than DC power supply indicator RS 485 mode indicator When LED is on
5. that the OPT SYNC LED should be flashing when no optic signal is received then turn to solid after a valid optic signal is received F Make sure the DIP switch settings for RS 422 CLK1 and CLK2 should be UP for RS 485 CLK1 and CLK2 should be set according to data rate refer to the following table below NOTE After installation is completed it is an excellent idea to verify and record the optical cable loss This reading will both verify the integrity of the circuit and provide a benchmark for future troubleshooting efforts RS 422 only 4 2 wire RS 485 for baud rate gt 9600bps 1 4 2 wire RS 485 for baud rate 5 25 kbps 4 2 wire RS 485 for baud rate gt 250 kbps TC1520 User s Manual Rev 6 7 Quick Installation example for 4 wire RS 485 Following diagram is an example for a 4 wire RS 485 application The host controller is communication with a remote device 2 through a 4 wire RS 485 bus The data sent is continuous data stream date rate 9600Baud async electrical interface 4 wire RS 485 DIP switches CLK1 down CLK2 up LED indicators to observe on PWR OPTIC SYNC RS 485 flash dim TD RD DRY MODE User s device 1 PwR O O Made in U S A IC TC COMMUNICATIONS Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM Signal ground p1 OPTIC a Tx Rx User s device 2 PWR O O Made in U S A IC TC COMMUNICAT
6. 85 signal Indicator for RS 485 mode input to TC 1520 PwR O Terminal blocks for Made in U S A RS 422 RS 485 signal IC TCCOMMUNICATIONS pg output to user s FIBER OPTIC CONNECTIVITY device Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM IN TRM i CLK2 pom OPTIC Terminal blocks for ci nG Tx Rx signal ground DC power supply input Mounting hole Optical Interface 4 DIP switches sw1 sw2 for RS 485 transition time RS 485 only sw3 sw4 for termination resistors cow COED RS 422 and 4 wire RS 485 Connection TC1520 User s Manual Rev 6 7 When both CLK and CLK2 switches are at the UP position the TC1520 is setup for an RS 422 application When any or both of CLK and CLK2 is at the DOWN position the TC1520 is setup for an RS 485 application The CLK1 and CLK2 should be set according to actual data baud rate page 5 The signal ground should connect to user s device s signal ground RS 422 RS 485 from user s IN 4 mi mu RS 422 RS 485 l L to user s device connect to user s device o 2 wire RS 485 Pin Connection PWR O Made in U S A TC COMMUNICATIONS FIBER OPTIC CONNECTIVITY Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM IN TRM om OPTIC mg Tx Rx For 2 wire RS 485 application only IN signals should be used The signal ground should connect to user s device s signal ground 2 wire RS 485
7. A form from the Customer Service Department If the product s warranty has expired you will need to provide a purchase order to authorize the repair When returning a product for a suspected failure please fill out RMA form provided with a description of the problem s and any results of diagnostic tests that have been conducted The shipping expense to TC Communications should be prepaid The product should be properly packaged and insured After the product is repaired TC Communications will ship the product back to the shipper at TC s cost to U S domestic destinations Foreign customers are responsible for all shipping costs duties and taxes both ways We will reject any packages with airway bill indicating TC communications is responsible for Duties and Taxes To avoid Customs Duties and Taxes please include proper documents indicating the product s are returned for repair retest ANG
8. IONS FIBER OPTIC CONNECTIVITY Model T 1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM Signal ground proT mg Tx Rx l6 TC1520 User s Manual Quick Installation example for 2 wire RS 485 ee Following diagram is an example for a 2 wire RS 485 application The SCADA host computer is polling the status of a remote RTU through a 2 wire RS 485 bus Once the remote RTU receives a polling command it answers with a response signal The communication is half duplex the polling device and responding device take turns to transmitting date rate 9600Baud async electrical interface 2 wire RS 485 DIP switches CLK1 down CLK2 up LED indicators to observe on PWR OPTIC SYNC RS 485 flash dim DRV MODE alternate flash TD RD SCADA HOST COMPUTER PWR O Made in U S A K TC COMMUNICATIONS CEN Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER Signal ground a7 ia IN TRM CLK2 9 14V OPTIC GT ka DC m a OPTIC MODEM Tx Rx PWR O Made in U S A IC TC COMMUNICATIONS Obie OPTIC CONNECTIVITY Model TC1520 RS 422 485 4 2 WIRE ASYNC FIBER OPTIC MODEM OUT TRM Signal ground pm OPTIC Rx 11 TC1520 User s Manual Rev 6 7 Connect to a BERT Tester with RS 530 for 2 wire RS 485 Testing 2 wire RS 485 Quick Installation local amp remote Units Set Tester to DTE device PWR O O Made in U S A IC TC COMMUNICATIONS
9. TC1520 RS 422 2 4 wire RS 485 FIBER OPTIC MODEM User s Manual Notice Although every effort has been made to insure that this manual is current and accurate as of date of publication no guarantee is given or implied that this document is error free or accurate with regard to any specifica tion TC Communications Inc reserves the right to change or modify the contents of this manual at any time without prior notification COPYRIGHT 1992 2004 ALL RIGHTS RESERVED f ml COMMUNICATIONS TC Communications Inc 17575 Cartwright Road Irvine CA 92614 FIBER OPTIC CONNECTIVITY Tel 949 852 1972 Fax 949 852 1948 Web Site www tccomm com Email info tccomm com TC1520 User s Manual Rev 6 7 Table Of Contents Chapter I OVervieW KAG KAGANNGE 3 D scriphon aaeain annaa ani naana anaa ANAN 3 RS 422 and 4 wire RS 485 Connection uu 4 2 wire RS 485 Pin Connection sssssssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnan 4 Switch FUNGDONS GANANG 5 Transmission Distances typical aaa 5 Launch Power amp Sensitivity pani R AAKALA 5 Power SUpply acs a cds wed wc ea aw ink Sc edd wade ea di aaa ae ncn ee 5 LED FUNCTIONS RANA 6 Theory of 2 Wire RS 485 Operation u 7 Termination of RS 422 or 2 wire RS 485 ua 8 Chapter 2 Installation sissies AA 9 Unpacking he UN bi KANINANG NAGA naaa aai Nanini 9 Equipment Location sssssssssssssnnunsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
10. er version System Bit error rate viene Lin 10 or better Visual indicator OPT SYNC TxD RxD DRV MODE RS 485 PWR Alarm sorte AKN NANA AA Ana Alarm OPT A OPT B Power Power SOC e a AA AA AA NAA NAA AA AA 12VDC 200mA Optional Laan 24VDC 100mA Optional uuuaaananaaannnnnnaaaaawa kendini 115 or 230VAC with external power cube Temperature Operating u aaa 10 C to 50 C Hi Temp O ptional 20 C to 70 C Storage LL 40 C to 90 C Humidity u s 95 non condensing Physical Height 1 91cm 0 75 WIGAN ANGNANRNTNSNANENENENANN NENE BAKE NE AG NS 10 16 cm 4 0 e a EA ETE 6 10 cm 2 4 Weight oona a a Aaaa N 275 gm 7oz TC1520 User s Manual Rev 6 7 Appendix A Return Policy To return a product you must first obtain a Return Material Authorization number from the Customer Service Department If the product s warranty has expired you will need to provide a purchase order to authorize the repair When returning a product for a suspected failure please provide a description of the problem and any results of diagnostic tests that have been conducted Warranty Damages by lightning or power surges are not covered under this warranty All products manufactured by TC Communications Inc come with a five year beginning 1 1 02 warranty TC Communications Inc warrants to the Buyer that all goods sold will perform in accordance with the applicable data sheets drawings or written specifications It also
11. nnnnnnnnnnnnnnnnn nananana nananana 9 Installation Procedure Summary ssssssssnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nananana 9 Quick Installation example for 4 wire RS 485 uu 10 Quick Installation example for 2 wire RS 485 LL 11 Testing for the 2 wire RS 485 with RS 530 tester sssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 12 Testing for the 2 wire RS 485 with RS 449 tester uuuuuuuuuaaaaaaanaaaanananaaaaaawwwana 13 Chapter 3 Specifications ARA NANANG 14 Chapter 4 Appendix sssssssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nannan nna 15 Return PONGCY E 15 Walang ANAKAN KEAN 15 TC1520 User s Manual Rev 6 7 Chapter 1 Overview Description The TC1520 Fiber Optic Modems interconnect a host controller with remote RTU remote terminal unit devices fitted with RS 422 and 4 wire or 2 wire RS 485 interfaces Asynchronous data rates up to 500kbps are supported The RS 422 interface is standard 4 wire or 2 wire RS 485 interface is switch selectable The TC1520 is equipped with four DIP switches and six LED indicators on the top of the cover to facilitate the installation and troubleshooting process The TC1520T is a high temperature option 20 C to 70 C Fiber optic connectors are ST FC is optional Electrical connectors are terminal blocks LED Indicators for power supply optic detection Terminal blocks for Mounting holes electrical signal monitoring RS 422 RS 4
12. still comes from trial and error For example if you know the async data baud rate is 9600 then set CLK1 to DOWN CLK2 to UP You may also want to try the 25K and 250K settings for a 9600 baud rate as a test to make sure the best transition time Important thing to remember is to try the fastes transition time first the default setting which usually would work for most of the baud rate TC1520 User s Manual Rev 6 7 Termination of RS 422 or 2 wire RS 485 A termination resistor is necessary for RS 422 or RS 485 applications Without proper termination the error rate of data transmission may be high The termination resistor is a 120 ohm resistor located only at the beginning or end of the electrical bus as shown in the following diagram TC1520 is equipped with two DIP switches IN TRM and OUT TRM for input and output termination resistors Their functions are depicted as following Termination RS 422 RS 485 RS 422 RS 485 RS 422 R 5 485 RS 422 R 5 485 device device device device JJ 120 ohm 120 ohm JJ OUT TRM IN TRM CLK2 CLK1 Ar UP position input termination resistor is off IN TRM DOWN position input termination resistor is ON UP position output termination resistor is off OUT TRM DOWN position output termination resistor is ON When switch OUT TRM is ON down out 120 ohm mia out When swi
13. tch IN TRM is ON down 120 ohm TC1520 User s Manual Rev 6 7 C hapter 2 Installation Unpacking the Unit Before unpacking any equipment inspect all shipping containers for evidence of external damage caused during transportation The equipment should also be inspected for damage after it is removed from the container s Claims concerning shipping damage should be made directly to the pertinent shipping agencies Any discrepancies should be reported immediately to the TC Communications Inc Customer Service Department Equipment Location The TC1520 should be located in an area that provides adequate lighting and working space Avoid locating it next to any equipment that may produce electrical interference or strong magnetic fields such as elevator shafts heavy duty power supplies etc Installation Procedure Summary The TC1520 is designed for quick and easy installation Follow the diagram on the next page Installation Procedure A Plug in the 12VDC power supply to TC1520 all the LEDs except PWR should flash for three seconds B Connect the local and remote units with optic cables as shown C Connect your local user s device See installation diagram on last page Make sure polarity matches The TD LED shows the logic status of input from user s device The RD LED shows the logic status of output to user s device D Connect the optic cable as shown in installation diagram Observe
14. warrants that at the time of sale the goods will be free from defects in material or workmanship This warranty shall apply for a period of five years from the date of shipment unless goods have been subject to misuse neglect altered or destroyed serial number labels accidents damages caused in whole or in part to accident lightning power surge floods fires earthquakes natural disasters or Acts of God improper installation or maintenance or alteration or repair by anyone other than Seller or its authorized representative Buyer should notify TC Communications Inc promptly in writing of any claim based upon warranty and TC Communications Inc at its option may first inspect such goods at the premises of the Buyer or may give written authorization to Buyer to return the goods to TC Communications Inc transportation charges prepaid for examination by TC Communications Inc Buyer shall bear the risk of loss until all goods authorized to be returned are delivered to TC Communications Inc TC Communications Inc shall not be liable for any inspection packing or labor costs in connection with the return of goods In the event that TC Communications Inc breaches its obligation of warranty the sole and exclusive remedy of the Buyer is limited to replacement repair or credit of the purchase price at TC Communications Inc s option To return a product you must first obtain a Return Material Authorization RMA number and RM
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