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1. 9 Back View of IG202T Modem 10 Rack Mount Module for the IG202T RM Modem Board 10 IG202T amp IGV23 Stand alone Modem Board 12 IG202T amp IGV23 mount Modem Board 13 Pin Locations on the Modem s RJ 11C Jack 20 Loopback Diagnostic MOSS eta eri pn ns eer cei pesa tore D 20 Back to Back Connection to a Second Modem 20 User s Manual SM202T SMV23 Modem DATA CONNECT ENTERPRISE Chapter 1 Introduction Thank you for purchasing Data Connect Enterprise s IG202T and IGV23 leased line modem the finest industrial grade modem available This manual will cover both the standalone IG202T a Bell 202 compatible and the standalone IGV23 an ITU V23 compatible modems The Data Connect Enterprise IG202T V23 modem is a 0 to1200 bps modem designed for 4 wire full duplex or 2 wire half duplex operation over a voice band leased line or private line The modem is designed utilizing the stand FSK modulation technology to achieve high performance and low cost The IG202T V23 modem is ideally suited for multi point communication systems that require fast response time short training time2. LN HOST Receiver ia ILI HOST Receiver Leased Line y Receiver Local Host Analog Loop Back V Leased Line Local Host Digital Loop Back Receiver Leased Line Remote RTU Digital Loop Back Figure 2 7 Loopback Diagnostic Modes User s Manual SM202T SMV23 Modem DATA CONNECT ENTERPRISE Appendix A Troubleshooting In the event you encounter a problem using your Data Connect Enterprise modem refer to the troubleshooting information in this appendix IMPORTANT encounter a problem with your modem be sure the switches on the modem are set to the appropriate positions see Table 2 1 on page 13 If a switch is halfway between an on and off setting the modem will not operate properly Problem Solving Table A 1 offers troubleshooting solutions for modem problems No LEDs are ON at the front panel Modem does not respond to the attached DTE and the all LEDs are off Modem does not receive data and the DCD and RxD LEDs are off The RTS CTS and TxD LEDs do not blink 23 Table A 1 Problem Solving Perform These Procedures Check the power supply source Be sure the input power to the modem s power connector is between 10 to 6OVDC Check the connecting RS 232 or RS 485 cable between the DTE and the modem The MR LED Modem Ready on th
3. 15 SW1 6 2 Wire or 4 Wire Operation 15 SW1 7 Transmitter Termination 15 SW1 8 Receiver Termination 16 JP1 Transmit TT a 16 JP2 RS 232 or RS 485 Serial Interface Standalone Only 17 For Hack Mount Plug in MOCOUIGS sienne 17 Connecting to a Transmission eta se vete ta exa EUER pea 18 Connecting to Voltage 0 aspe kan 19 Connecting to an RS 232 Device 20 Connecting to an RS 485 Device 20 el 20 Loopback Control t 20 Problem Solving 20 iii User s Manual SM202T SMV23 Modem Contents Figures Figure 1 1 Figure 1 2 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 7 Figure 2 8 Figure 2 9 Point to Point Network Using the IG202T V23 Modem 7 Multipoint Polling Network Using the IG202T V23 Modem f Front View of the IG202T V23 Modem
4. wa HAB nog Loopback nma Re _ When the modem is in remote loopback V 54 Loop 2 both the ALB and DLB LEDs go ON Loopback Control Switch The front panel of the modem has a push button for initiating the following loopback diagnostic tests Local digital loopback started by pressing the button one time The DLB LED should be ON When a DTE is connected to the RS 232 port of the modem the transmit data is loop back to the DTE as receive data This test will verify the modem s RS 232 interface along with the cable attached Local analog loopback started by pressing the button two times The ALB LED should be ON When a DTE is connected to the RS 232 port of the modem the transmit data is loop back to the DTE as receive data This test will verify the modem transmitter receiver and its RS 232 interface along with the connecting cable Remote digital loopback Press the local modem s diagnostics test button three times Both the ALB and DLB LEDs should be ON In this mode the modem is performing a loop back to the remote modem V 54 loop 2 configuration The This test will verify both modems transmitters receivers and the leased line 21 User s Manual SM202T SMV23 Modem Installation Figure 2 7 shows these three loopback diagnostics 22 E gt I TI HOST Receiver Transmitter
5. Screw terminals on the power interface accept 24 to 16 AWG However surge protection is effective only if there is a solidly earthed ground connection greater than 18 AWG Be sure the power source is not controlled by a wall switch which can be inadvertently turned off shutting off power to the modem 19 User s Manual SM202T SMV23 Modem Installation Connecting to an RS 232 Device The modem back panel provides a female 9 pin RS 232 connector that accepts an attached RS 232 device see Figure 2 2 on page 10 This connector accepts a standard connection to a DTE RTU that conforms to the pin assignments shown under RS 232 DTE Interface on page 20 Connecting to an RS 485 Device The modem rear panel provide an RJ 11C module jack connector for a 4 pin RS 485 or RS 422 interface in the event that your DTE or RTU does not support the RS 232 interface see Figure 2 2 on page 10 and Figure 2 6 The pin assignments for the RS 485 interface are listed in Table 2 3 Pin 6 Pin 1 m Figure 2 6 Pin Locations on the Modem s RJ 11C Jack Table 2 3 RJ 11C Modular Jack Pin Assignments RJ 11 Pin Number Corresponds to Signal Name Modem Input or Output Pp NdUed NA Named NM 20 User s Manual SM202T SMV23 Modem Installation LEDs The front panel of the modem provides the LEDs shown in Table 2 3 Table 2 4 Modem LEDs 8 Yw 7
6. RS 232 or RS 485 port Only one type of interface is supported by the modem Table 2 33 shows the two jumpers must be placed to make the selection Table 2 3 RS 232 or RS485 Select RS 232 V 24 Interface RS485 RS422 Interface JP2 Pin 1 to Pin 3 JP2 Pin 3 to Pin 5 Pin 2 to Pin 4 Pin 4 to Pin 6 JP2 For Rack Mount Plug in Modules Jumper block JP2 is used to connect or separate the chassis ground earth ground and the signal ground together Signal ground is the common voltage return for your DTE RS 232 interface 17 User s Manual SM202T SMV23 Modem Installation Connecting to a Transmission Line The modem has a transmission line interface 11 that can be configured for 2 or 4 wire analog connection where in 4 wire connection one pair Tx A and Tx B is used to transmit data and the other pair Rx A and Rx B is used to receive data The transmit pair and receive pair are non polarized Table 2 44 shows the pin numbers and corresponding signals for the modem Error Reference source not found shows the transmission line interface NOTE For communication to occur the Rx line of one modem must connect to the Tx line of the other modem The modem s Tx Rx pair are non polarized NOTE The modem does not support leased line operation with DC shielding current Leased line connector pin assignments for the rack mount module can be found in the documentation for your Motorola UDS RM16M Table 2 4 Transmission Line
7. and low throughput delay This User s Guide describes the IG202T V23 AC powered and IG202T DC V23 DC DC powered stand alone modems as well as the rack mount IG202T RM plug in module for the Motorola UDS RM16M This manual is designed to get your modem up and running as quickly as possible It contains all the information you need to configure and install your modem It also contains troubleshooting information in the unlikely event you encounter a problem with your modem 5 User s Manual SM202T SMV23 Modem Introduction Features The IG202T V23 modem is specifically designed for harsh environments typically associated in utility substations and industrial facilities Though functionally similar to commercial modems the IG202T V23 provides the following unique features that make it well suited for utility and industrial applications Packaged in a rugged compact enclosure for industrial applications Leased line interface protected with heavy duty surge protection devices Built in hardware watchdog timer for software lock up prevention without requiring human intervention making it ideal for unmanned locations Works within an extended temperature range of 40 C to 85 Designed with coupling transformers for high voltage isolation and common mode noise rejection in industrial and commercial environments Operate over voice band conditioned or unconditioned leased line and pilot wires Accepts power from a wide rang
8. be obtained Before asking for an RMA number ascertain that the product was purchased from Data Connect Enterprise If you bought the product from a Distributor or Systems Integrator the product should be returned to that vendor The most convenient method to obtain an RMA number for a product purchased from Data Connect Enterprise is to send an email to Data Connect Enterprise Information required must include e Company name e Address including any Mail Stop or specific delivery information contact information and e mail address for the technical contact s at your company If the above information is on your letterhead that format is acceptable For each item you wish to return please include product model number usually found the serial number tag serial number for each item you wish to return description of the problem you are encountering cause of the problem if known The product must be properly packed and returned to Data Connect Enterprise 3405 Olandwood Court Olney MD 20832 Attn RMA Technical Support The RMA number must be legibly displayed on the shipping carton No RMAs will be issued without a product review DCE will not be responsible for any product returned without an RMA number If you believe the product may be out of warranty include a method of payment for repairs either a Purchase Order number or credit card number card holder name da
9. 1 Rev B September 2008 DATA CONNECT ENTERPRISE Contents 97 7 E PIQUPCS iv Chapter 1 mr rc M 5 PMNS c 6 APpIICaTONS 7 jeurdeudui li 8 Unpacking Your HardWare S 8 Additional Items You Need to Complete Your 8 PAGS CV ENV CAN e 9 Front VIEW o HH T eect ene ees 9 siis 4 M 9 Rack Mount Rec 10 Installation SUMMAaAry 10 Configuring the Modem 11 Setting the DIP Swine Ea oix possa 13 eT 14 SW1 2 RTS CTS Delay 202 Mode Only 14 SW1 3 Transmit Carrier Control 14 SW1 4 Soft Carrier 15 SV 1 5
10. 202T DC modem 8 User s Manual SM202T SMV23 Modem Installation For the IG202T RM consult the documentation for your Motorola UDS RM16M Hardware Overview Front View Figure 2 1 shows the front view of the IG202T V23 stand alone modem Starting from the left side this view shows A set of eight LEDs for modem interface status see Table 2 4 on page 20 A loopback control push button switch see Loopback Control Switch on page 20 DATA CONNECT 1G202T RTS CTS TXD RXD DCD MR ALB DLB TEST Figure 2 1 Front View of the IG202T V23 Modem Back View Figure 2 2 shows the back view of the IG202T stand alone modem Starting from the left side this view shows A 4 wire 2 wire configuration block labeled LEASED LINE An RJ 11 modular jack labeled RS 485 for connecting the modem to an RS 485 RTU A female 9 pin RS 232 connector labeled RS 232 for connecting the modem to a standard DTE RTU A power connector labeled 10 48V DC User s Manual SM202T SMV23 Modem Installation RS485 10 48VDC Figure 2 2 Back View of IG202T Modem Rack Mount View Figure 2 3 shows the rack mount plug in module Figure 2 3 Rack Mount Module for the IG202T RM Modem Board Installation Summary This section describes the steps for installing the modem 10 User s Manual SM202T SMV23 Modem Installation NOTE Itis important to follow the steps below to configure the modem s DIP Bop switches to match your DTE RTU i
11. Connector Pin Assignments Corresponds to This Signal Rx Tx 4 Tx Tx Rx 5 Rx NOTE When 2 wire half duplex is used the center pair must be used for both transmit and receive Pin 6 Pin 1 6 8 User s Manual SM202T SMV23 Modem Installation Connecting to a Voltage Source The back panel of the modem provides a 2 position screw terminal power interface connector For your convenience the DC voltage of the input power is non polarized To meet your specific application the modems can be powered from the following power sources Model IG202T with AC DC power converter 90 to 265 Volts AC 50 to 60 Hz single phase or 100 to 400 VDC The output of the converter is a 12 VDC source that will power the modem Model IG202T DC DC version 10 to 60 Volts DC The model IG202T DC comes with a power cord for making this connection Figure 2 2 on page 10 shows the connection to the Model IG202T s power interface shows the connection to the Model IG202T DC s power interface WARNING Before you connect voltage source observe the following power supply voltage guidelines Otherwise you will void your warranty if the wrong voltage is applied Be sure the voltage source is within the permitted ranges shown above Otherwise your modem and any attached devices may be damaged e Customer supplied cables must be suitable for the site environmental conditions
12. DATA CONNECT ENTERPRISE IG202T RTS CTS TXD RXD DCD MR ALB DLB 5 User s Manual IG202T and IGV23 Modem Document Number 520 01005 001 Rev B Copyright 2008 Data Connect Enterprise All Rights Reserved Web site www data connect com The products and programs described in this User s Manual are licensed products of Data Connect Enterprise Inc This User s Manual contains proprietary information protected by copyright and this User s Guide and all accompanying hardware and documentation are copyrighted Data Connect Enterprise Inc does not warrant that the product will work in all environments and applications and makes no warranty and representation either implied or expressed with respect to the quality performance merchantability or fitness for a particular purpose Information in this User s Guide is subject to change without notice and does not represent a commitment on the part of Data Connect Enterprise Inc Data Connect Enterprise Inc assumes no responsibility for any inaccuracies that may be contained in this User s Manual No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or information storage and retrieval systems for any purpose other than the purchaser s personal use without the express written permission of Data Connect Enterprise Inc IG202T V23 Modem User s Manual 520 01005 00
13. Delay Bell 202 Mode Only SW1 2 ON 33 0 ms delay e SW1 2 OFF 10 0 ms delay default Switches SW1 2 determines the duration of the RTS CTS delay in Bell 202 mode For V23 mode the RTS CTS delay is fixed at 33 ms SW1 3 Transmit Carrier Control SW1 3 ON Constant carrier SW1 3 OFF Controlled by RTS default DIP switch SW1 3 selects either constant or switched carrier Constant carrier forces the modem to transmit a modulated carrier to the remote modem regardless the state of RTS signal Generally constant carrier mode is used in two different network configurations e Atthe master modem in a point to multipoint polling network e At both modems in a 4 wire point to point connection When using constant carrier the receiving modem will not have to be re trained every time RTS is raised In constant carrier mode RTS CTS delay is reduced to less than 0 5 ms as compare to either 10 or 33 ms in switched carrier mode The system response timing is faster by reducing the RTS CTS delay Note Constant Carrier is disabled automatically when Auto RTS mode is used switched carrier mode switch SW1 3 OFF the RTS CTS delay is determined by SW1 2 setting 14 User s Manual SM202T SMV23 Modem Installation SW1 4 Soft Carrier Control SW1 4 Soft Carrier is enabled SW1 4 OFF Soft Carrier is disabled In Bell 202T mode when soft carrier mode is enabled a carrier frequency of 900 Hz is transmitted a
14. Description Output Data Carrier Detected ECCE Receive Data Transmit Data Signal Ground Data Set Ready Modem Ready Input Request To Send RS 485 DTE Interface Table B 3 RS 485 DTE Interface RJ 11 Pin Number Corresponds to Signal Name Modem Input or Output Pp Environmental Specifications Operating temperature 40 to 85 C Storage temperature 40 to 4125 C Operating humidity 5 to 95 95 non condensing Line isolation 3750 V RMS Surge protection Leased line up to 15K VA 26 User s Manual SM202T SMV23 Modem DATA CONNECT ENTERPRISE Appendix C Limited Product Warranty Data Connect Enterprise warrants that the Product sold will be free from defects in material and workmanship and perform to Data Connect Enterprise applicable published specifications for a period of 24 months from the date of delivery to Customer The liability of Data Connect Enterprise hereunder shall be limited to replacing or repairing at its option any defective Products that are returned F O B to Data Connect Enterprise s facility or at Data Connect Enterprise s option refunding the purchase price of such products In no case are Products to be returned without first obtaining permission and a customer return order number from Data Connect Enterprise In no event shall Data Connect Enterprise be liable for any consequential or incidental damages Products that
15. SEED Soft Car Anti 2 Fe pon m LE RX Termination 2 pop 0 dBm z 4 dBm 5 8 dBm 12 dBm 5 110 01006 Rev SN Figure 2 5 IG202T amp IGV23 Rack mount Modem Board Setting the DIP Switches SW1 is a 8 position DIP switches used to configure all the options and features of the modem Table 2 3 shows the setting of the switches NOTE Switches SW1 are toggle switches To configure the switches use a small sharp pin to firmly press down on one end to open or to close each switch Never leave any switch in half open and half close Press down on the side of the switch labeled OPEN is referring to as OFF condition When the switch is CLOSED it is in the ON state Table 2 1 Modem Switch Settings 10 0 ms 202T 2 CTS Delay Bell 202 SW1 2 RTS CTS Delay Bell 202 mode only 33 ms 33 ms V 23 mode 13 User s Manual SM202T SMV23 Modem Installation SW1 1 Auto RTS SW1 1 ON Enable Auto RTS SW1 1 OFF Disable Auto RTS default For data terminals that do not provide hardware Request To Send RTS set switch SW1 1 to ON to enable auto RTS mode In this mode TXD is detected at the modem and an internal RTS signal is turned ON After training completes the TXD is transmitted to the remote modem The transmitter turns itself off if no TXD is detected after a pre determined length of idle time SW1 2 RTS CTS
16. change the DIP switch settings recycle power to the modem to have the settings take effect NOTE The DIP switch settings will not take effect until you recycle power to the modem To access the configuration DIP switches and jumpers on the stand alone modem 1 Ground yourself to discharge any ESD which might cause damage to the sensitive devices on the modem board Use a small Philips screw driver to remove the two screws at the bottom of the enclosure and remove the top cover The location of the DIP switches and jumpers for the stand alone modem are shown in Figure 2 4 For DIP switches and jumpers on the rack mount plug in module see Figure 2 5 User s Manual SM202T SMV23 Modem tia eia vid Installation 3 Replace the top cover after the configuration is completed Configuration Switch Configuration Jumpers SW1 JP1 amp JP2 Figure 2 4 IG202T amp IGV23 Stand alone Modem Board User s Manual SM202T SMV23 Modem Installation Configuration Switches Signal and Chassis E Ground Connection uro fe us 5 B 8 2 Transmit Output Level Gis IPN OPEN 5 9 us CONN B e Y swi IT Auto RT z apo w E
17. e front panel should be ON when the modem is idle Check the DIP switches of both modems to make sure that the same data rate and operating parameters are identical on both modems The receive line pair may be disconnected from the modem Make sure the transmission line connection to the modem is accurate and secure The receive signal level may be below the CD threshold Set switch 1 5 ON to see whether configuring the modem for a 43 dBm threshold resolves the problem If this problem remains unresolved perform a local ALB loopback test to determine if the modem s receiver is functioning correctly The attached terminal or DTE may not be sending data to the modem Verify that data is being transmitted If data is being transmitted make sure the RS 232 cable is sound and securely connected to the modem and terminal or DTE User s Manual SM202T SMV23 Modem DATA CONNECT ENTERPRISE Appendix B Specifications General Specifications Data rate Data format DTE interface Line conditions Operating modes Modulation RTS CTS Delay Receiver dynamic range Operating temperature Power supply Surge protection Carrier control Carrier loss recovery Auto RTS Anti streaming 0 1200 bps Transparent to DTE EIA RS 232 V 24 or RS 485 compatible TELCO voice band 4 or 2 wire leased line conditioned or unconditioned lines Private metallic circuits 2 wire half duplex or 4 wire full duplex FSK Be
18. e of AC and DC power supplies 1IG202T V23 90 to 265 VAC or 100 to 400 VDC 1G202T V23 DC 10 to 60 VDC G202T V23 RM Plug in module for the Motorola UDS RM16M modem nest Standard industrial connectors for data analog and power interfaces allow reliable interconnection to other industrial equipment Asynchronous data rates 0 1200 bps Easily accessible DIP switches for user configuration and option selection DB9 F connector for RS 232 V 24 interface and RJ 11 for RS 485 Local analog local digital and remote digital loopback diagnostics User s Manual SM202T SMV23 Modem Introduction Applications The IG202T V23 modem is designed for point to point and multipoint data communications Figure 1 1 shows a typical point to point configuration using the IG202T modem and Figure 1 2 shows a typical multipoint configuration using the IG202T modem Modem Remote Terminal Workstation Figure 1 1 Point to Point Network Using the IG202T V23 Modem Modem Remote Terminal Modem Workstation Remote Terminal Figure 1 2 Multipoint Polling Network Using the IG202T V23 Modem There are a number of factors that can affect the modem s operation and performance These include Modem speed i e bit error rate transmission line distance 2 wire or 4 wire configuration e Transmission line characteristics noise and line impairments Transmission cable len
19. ecessarily burdened To select this configuration set switch 51 7 ON for the slave modems If you use the modem with transmission lines that are transformer coupled or with an impedance isolated network such as a transformer bridge set switch S1 7 OFF for proper operation SW1 8 Receiver Termination Impedance SW1 8 ON 600 default SW1 8 OFF Modem receiver is in high input impedance 20K ohms Switch SW1 8 is used for multi point configuration networks When multiple modems are connected on the same metallic circuit In a point to multipoint network configuration all except one of the slave modem s receiver termination should be set to high impedance if the modems receivers are connected by the same circuit such that it will not load down the receiver signals Only one receiving modem should be set to terminated at 600 ohms The master modem s receiver is always terminated with 600 ohms JP1 Transmit Level JP1 1 through JP1 8 adjust the modem s transmit level Table 2 3 2 2 shows the transmit levels you can select using a 2 position shunt to connect 2 pins from JP1 Table 2 2 Transmit Levels Transmit Level JP1 Jumper Settings 8 dBm Pin 5 to Pin 6 12 dBm Pin 7 to Pin 8 16 User s Manual SM202T SMV23 Modem Installation JP2 RS 232 or RS 485 Serial Interface Standalone Only JP2 a 6 pin header is used to select the communication port for the modem You may select to use either the
20. gth pilot wire Network configuration point to point or multipoint 7 User s Manual SM202T SMV23 Modem DATA CONNECT ENTERPRISE Chapter 2 Installation This chapter describes how to configure and install the modem to maximize the performance and to match with your Data Terminal Equipment DTE or Remote Terminal Unit Unpacking Your Hardware Your package should include At least one of the following IG202T or IGV23 modems Model IG202T or IGV23 for 90 to 265 VAC Model IG202T DC or IGV23 DC for 10 to 60 VDC Model IG202T RM or IGV23 RM for RM16M plug in module A switching power supply module for 90 265VAC input model IG202T or IGV23 only A leased line cable with optional earth ground conductor for stand alone units only A DC power cable model IG202T DC or IGV23 modem only This User s Manual or CD ROM If your package contents are damaged or missing contact your place of purchase Additional Items You Need to Complete Your Installation To complete your installation and operate your modem you need these additional items Two or four wire transmission line or leased line A DB 9 data cable for your RS 232 interface Data Terminal Equipment DTE port or a RJ 11C data cable for your RS 485 DTE Power supply that provides either 90 to 265 Volts AC 50 to 60 Hz single phase or 100 to 400 VDC if you have the model IG202T V23 modem or 10 to 60 Volts DC if you have the model IG
21. have been subject to abuse misuse accident alteration neglect unauthorized repair or installation are not covered by the warranty Data Connect Enterprise shall make the final determination as to the existence and cause of any alleged defect No liability is assumed for expendable items such as lamps and fuses No warranty is made with respect to custom products or Products produced to Customer s specifications except as specifically stated in writing by Data Connect Enterprise in the agreement for such custom products Warranty is voided if the serial number label on the printed circuit assembly of returned modems is removed defaced or destroyed This label contains the serial number that will provide proof of the date of manufacturing This warranty is the only warranty made by Data Connect Enterprise with respect to the goods delivered hereunder and may be modified or amended only by a written instrument signed by a duly authorized officer or Data Connect Enterprise and accepted by Customer This warranty and limitation extends to customer and to users of the product and is in lieu of all warranties with respect to the product whether express implied or statutory including without limitation the implied warranties of merchantability and fitness for a particular purpose 27 User s Manual SM202T SMV23 Modem DATA CONNECT ENTERPRISE Appendix D RMA Procedure Before returning any Data Connect Enterprise product an RMA number must
22. ll 202T or V 23 compatible e Mark 1200 Hz 1300 Hz V 23 e Space 2200 Hz 2100 Hz V 23 e Soft Carrier 900 Hz Bell 202T only 10 or 33 ms Bell 202T 33 ms V 23 to 43 dBm 40 C to 85 C Wide range switching power supply e 1 202 AC version 90 to 265 Volts AC 50 60 Hz single phase or 90 to 400 VDC e IG202T DC DC version 10 to 60 Volts DC Leased line up to 15KV Constant or switched DIP switch selectable Automatically Support DTE without hardware RTS 30 second timer to prevent transmitter lock up network Mechanical Specifications Enclosure Dimensions 24 ABS with removable top cover 4 1 wide x 4 9 long x 1 40 high User s Manual SM202T SMV23 Modem Specifications Weight 0 5 Ibs without AC to DC power converter module Interface connectors Leased Line 4 position RJ 11C modular Jack Data Terminal Equipment DB 9 female connector for RS 232 RJ 11C module jack for RS 485 Interface Connector Pin Assignments Table B 1 Leased Line RJ 11C Pin Assignments Corresponds to This Signal Rx Tx ui 4 Tx Tx Rx 5 Rx NOTE When 2 wire half duplex is used the TX pair must be used for both transmit and receive T T x x x T Tx Modem 1 Modem 2 Figure 2 8 Back to Back Connection to a Second Modem 25 User s Manual SM202T SMV23 Modem Specifications RS 232 DTE Interface Table B 2 RS 232 DTE Interface T Name Modem Input Output DB 9 Pin
23. nterface requirement and the transmission line characteristics If you are not certain about your system s parameters or the leased line configuration please contact your network administrator for assistance Configure the modem using the DIP switches and jumpers See pages 13 Connect to a transmission line See page 18 Connect to a voltage source See page 19 Connect a DTE device See page 20 Configuring the Modem You configure the modem using the 8 position DIP switch and two sets of configuration jumpers on the printed circuit board of the modem labeled S1 JP1 and JP2 Configuration DIP switches S1 for the stand alone and rack mount modems are identical Their descriptions in this user s manual apply to both modem versions Configuration jumper JP1 for the standalone and rack mount modem card is used to select transmit output level It is important to follow the steps described below in the order shown to ensure that you configure your modem properly using the modem DIP switches 1 Use DIP switch 1 S1 to configure the modem for your host DTE interface and network topology Using S1 you select the modem s serial to match your host computer or RTU devices and other DTE specific operating parameters Use Jumper JP1 to select the modem s transmitter output level to match your specific leased line conditions The JP2 is used only in the standalone modem for selecting either RS 232 or RS 485 interface After you
24. t the end of a transmission in order to turn off the carrier detect CD at the receiving modem This feature is only use for the Bell 202T modems SW1 5 Anti streaming SW1 5 ON Anti streaming is active SW1 5 OFF Anti stream is inactive default Typically anti streaming is used in multi point applications to prevent a malfunctioning slave data terminal or RTU from occupying the line indefinitely When anti streaming is active the modem can transmit data for a maximum of 30 seconds before the transmitter turns off automatically The modem then looks for an ON to OFF RTS transition before proceeding with normal operation SW1 6 2 Wire or 4 Wire Operation SW1 6 ON 2 Wire Half Duplex Mode e SW1 6 OFF 4 Wire Full Duplex Mode default Switch SW1 6 configures the modem for either 4 wire full duplex or 2 wire half duplex operation SW1 7 Transmitter Termination Impedance SW1 7 ON Switched by RTS SW1 7 OFF 600 default Switch SW1 7 is used for multi point configuration networks When multiple modems are connected on the same metallic circuit The transmitter termination should be of high impedance if the modem is not transmitting in order not put a load on the line 15 User s Manual SM202T SMV23 Modem Installation transmitter is only terminated with 600 ohms when RTS is asserted This configuration should be used for all slave modems to prevent the transmitting modem from being unn
25. te of expiration on the RMA request Repairs currently require 5 working days and are returned UPS second day air Contact us by e mail mspellerberq data connect com or call 301 924 7400 x 25 if you should have any questions 28 User s Manual SM202T SMV23 Modem
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