RAD Data comm 146 User's Manual
Contents
1. 18 miles using 1310 nm single mode fiber e 46 km 28 miles using 1310 nm laser diode single mode fiber The FOM 6MP contains two optical interfaces and one V 24 RS 232 port One optical interface passes data to and from the host while the other passes data to and from the rest of the terminals in the chain The V 24 RS 232 interface is connected to the local terminal Terminal contention for transmission to the Remote terminal units host is selectable transmitting data or raising RTS signal The FOM 6MP includes anti streaming protection which prevents blockage of data transmission The FOM 6MP disables a port that blocks the polling for a preset user selectable period of time LED indicators help the user to easily isolate faulty segments along the chain of terminals The FOM 6MP requires an external DC power supply of 10 30 VDC 500 mA RAD Data Communications 2006 Catalog 12 SWAQGOW JIiLldO YAGldA AYNLVINIW 153 e Asynchronous transmission up to 57 6 kbps e Supports any type of asynchronous characters with no need for configuration e Transmission range up to 16 km 10 miles over single mode fiber e Full or half duplex e Continuous or controlled carrier e DTE DCE switch e No external power required Visit www rad com for latest product updates The miniature FOM 6AV high speed fiber optic modem is used for transmission of asynchronous data over fiber optic links It operates at any data rate2. 4 wire E SRM 6A SRM 5A Async Async terminal computer The SRM 5A modem is available with an internal filter optional for the SRM 6A The filter is designed to overcome radiated and conducted interference for high noise immunity The SRM 6A is also available as a card for mounting in a 19 rack see the CMN 16 nest card CMN 6A Approximate Range for 24 AWG 0 5 mm Data Rate kbps km miles 19 2 2 0 1 2 9 6 4 5 2 8 4 8 5 0 3 0 1 2 2 4 5 5 3 4 Asynchronous Multipoint Short Range Modems The miniature SRM 5AC and SRM 6AC are short range modems connecting full or half duplex asynchronous terminals to computers Featuring carrier control the modems can be used in multipoint applications and where end to end transfer of a control signal is required They operate at data rates up to 19 2 kbps with a range of up to 3 5 km 2 2 miles over 24 AWG The SRM 5AC is a compatible sub miniature model of the SRM 6AC offering the same features in half the size The carrier can be strapped to be constantly ON or controlled by the Request to Send signal A switch selectable DTE DCE option allows the modems to operate as a DTE for connection to another DCE without requiring a cross cable The modems are available with an internal filter optional for the SRM 6AC The filter is designed to overcome radiated and sRM 6AC Async computer SRM 5AC SRM 5AC SRM 5AC Async terminal c
3. 19 rack SRM 6A Visit www rad com for latest product updates The miniature SRM 5A SRM 6A and SRM 6L are asynchronous short range modems connecting full duplex asynchronous terminals to computers The SRM 5A and SRM 6A operate at data rates of up to e 4 wire full or half duplex e Controlled carrier for multipoint e Transfers one control signal e Data rates up to 19 2 kbps e Range up to 3 5 km 2 2 miles e DCE DTE switch e LED indicator for carrier detect SRM 5AC only e No external power required e Line connector options terminal block RJ 12 and RJ 45 e Available as a card for 19 rack Visit www rad com for latest product updates Asynchronous Short Range Modems 19 2 kbps with a range of 4 5 km 2 8 miles at 9 6 kbps The SRM 6L operates at data rates of up to 19 2 kbps up to a range of 3 2 km 2 miles The SRM 5A is fully compatible with the SRM 6A and offers the same features in half the size The SRM 6L offers the unique feature of insensitivity to wire polarity There is no need to observe and connections when using twisted pairs making it easy to install and maintain The DCE DTE switch allows operation as a DTE for connection to another DCE without requiring a cross cable All three units operate without external power by drawing low power from the data and control signals Connection to the line is through isolation transformers for protection against AC or DC overvoltages 7 N
4. RANGE MODEMS MINIATURE FIBER OPTIC MODEMS SRM 3A Ultra Miniature Async Short Range Modem The SRM 3A is an ultra miniature asynchronous short range modem connecting full duplex asynchronous terminals to computers Using 24 AWG and operating at 9 6 kbps it has an extended range of 4 5 km 2 8 miles It typically operates at data rates up to 19 2 kbps The combination of the modem s miniature size and the use of a 9 pin D type connector makes it particularly suitable for PCs for connecting laptop computers to a mainframe and for UNIX systems such as Unisys U6000 50 The SRM 3A is coupled to the line through isolation transformers for protection against AC or DC overvoltages SRM 3A operates without external power by drawing low power from the DTE data and control FOM 485 signals The modem will operate fully even if only Transmit Data is connected i e without any control signals The modem connects to the DTE via a 9 pin connector male or female Connection to the line is via a 4 screw terminal block RJ 11 jack or RJ 45 Jack Approximate Range for 24 AWG 0 5 mm Data Rate kbps km miles 19 2 1 0 0 6 9 6 4 5 2 8 4 8 6 0 3 7 2 4 7 0 4 3 1 2 7 0 4 3 Miniature RS 485 Fiber Optic Modem The FOM 485 is an asynchronous miniature fiber optic modem that transmits RS 485 signals over fiber optic cables The FOM 485 is used in utility applications where there is a need to connect the main controller to a remote t
5. to 4 5 km 2 8 miles for 24 AWG Controlled or continuous carrier Four interfaces RS 232 V 24 V 35 X 21 RS 530 Four LED indicators Powered via wall mount power supply Line connector options terminal block RJ 12 and RJ 45 Visit www rad com for latest product updates 56 64 kbps IBM 37X5 SRM 8H SRM 8H RAD Data Communications 2006 Catalog MINIATURE SHORT RANGE MODEMS SRM 31S Miniature Multirate 2 Wire Modem The SRM 31S miniature synchronous modem operates full duplex over a single pair of wires It supports data rates from 1 2 kbps to 128 kbps The transmission range is up to 8 km 5 miles over 24 AWG cable independent of the data rate IDSL technology ISDN U interface provides extended range and efficient transmission over a single copper pair The SRM 31 can operate opposite the ASMi 31 modem supporting remote control p o Digital Network aff SRM 38H ASMi 31 2C LRS 24 and monitoring When the ASMi 31 is a card in the LRS 24 rack the SNMP central management station can perform control and monitoring of the remote SRM 31 Power is provided by a wall mounted power supply that is supplied with the product End to end signaling is available with no interference to data transmission The user can select between RTS DCD and DSR DTR end to end signaling options 2 wire SRM 31 8km 128 kbps 5 miles DTE High Speed Short Range Modem The SRM 8H i
6. up to 57 6 kbps and supports any type of asynchronous characters with no need for configuration e Asynchronous transmission up to 19 2 kbps e Transmission range up to 3 km 1 9 miles over multimode fiber e Full or half duplex e Continuous or controlled carrier e DCE DTE switch e LED indicator for data transmit e No external power required e Optional metal case FOM 6A only e Available as a card for 19 rack Visit www rad com for latest product updates 154 RAD Data Communications 2006 Catalog MINIATURE FIBER OPTIC MODEMS FOM 6AV High Speed Fiber Optic Modem 7 Ca Fiber optic cable EE FOM 6AV FOM 6AV Host Transmission over fiber ensures data integrity high immunity against EMI RFI and data security The modem supports ranges of up to 3 km 1 9 miles over multimode fiber and up to 16 km 10 miles over single mode fiber End to end signaling is available using the carrier between the modems in controlled carrier mode When RTS is raised on one end it causes the DCD to rise on the other end of the link Innovative circuitry allows the modems to FOM 5A FOM 6A Async terminal operate without external power by drawing low power from the DTE data and control signals The FOM 6AV has a V 24 RS 232 interface and is available with either a male or female integral D type 25 pin connector The product includes an LED for indicating data transmission over the link The modem is availab
7. 2 kbps selectable with a range of 5 km 3 0 miles at 9 6 kbps RAD Data Communications 2006 Catalog MINIATURE SHORT RANGE MODEMS SRM 5S Synchronous Short Range Modem The miniature SRM 5S is a short range modem connecting full duplex synchronous terminals controllers and computers It operates at nine data rates up to 19 2 kbps When operating at 9 6 kbps the modem supports ranges up to 5 km 3 0 miles The modem operates without external power by drawing low power from the data and control signals Connection to the line is through isolation transformers for protection against AC or DC overvoltages Transmit timing is provided by an internal clock The unit has an RS 232 V 24 interface and is available with an integral male or female 25 pin connector for the DTE interface and a 5 screw 4 wire and ground terminal block for the line The SRM 5S has both a terminal block and an RJ 45 or RJ 12 line connector The modem is also available as a card for mounting in a 19 rack Approximate Range for 24 AWG 0 5 mm Data Rate kbps km miles 19 2 4 0 2 5 9 6 5 0 3 0 4 8 5 5 3 4 2 4 5 5 3 4 1 2 6 0 3 7 SRM 5SC SRM 6SC Sync Multipoint Short Range Modems The SRM 5SC is a fully compatible sub miniature model of the SRM 6SC offering the same features in half the size Three alternative sources for transmit timing are available internal oscillator external clock from the terminal or loopback clock deri
8. INATORS MME MME V 35 Replaces Two Sync Modems of 100 m 330 ft on each side MME operates at selectable data rates up to 19 2 kbps MME V 35 operates at 56 64 kbps replacing high speed modems The MME and MME V 35 generate the receive and transmit clocks internally for the two synchronous DTEs as well as the control signals necessary to emulate half or full duplex operation The delay between Request to Send and Clear to Send can be independently set on the MME on port O or 6 6 or 53 msec and on the MME V 35 on port O or 7 or 64 msec Carrier Detect signal can be set to constantly ON or used as a DTE to DTE handshaking signal where RTS on one port is converted to DCD on the other port MME up to 19 2 kbps MME V 35 56 64 kbps Three models are available MME requires no external power supply drawing low power from the data and control signals Physical connection between the MME and the DTEs is via 25 pin D type connectors either male or female MME V 35 requires no external power Supply drawing low power from the V 35 control signals MME V 35P has a jack for connection to an external wall mounted power supply of 9 12 VDC 200 mA The MME V 35P is used in applications where the DTEs do not provide the control signals necessary to power the MME V 35 Physical connection between the MME V 35 and the DTEs is via two 34 pin V 35 connectors each on a 30 cm 1 ft cable IBM 3174 RAD Data Communicatio
9. OM 8H has diagnostic capabilities complying with the ITU V 54 standard Two loops are available local analog loop and remote digital loop These are activated by a manual switch or by toggling the corresponding pins of the DTE interface not applicable with X 21 interface Transmit timing is provided by one of three alternative sources e internal oscillator e loopback clock derived from the receive signal e external clock from the terminal The carrier can be strapped for either continuous or switched operation controlled by the RTS signal Several interface options are available RS 232 V 24 RS 530 X 21 or V 35 The modem has LED indicators for TD DCD TEST and POWER The FOM 8H is packaged in a lightweight plastic case Selectable sync or async operation V 54 diagnostics Selectable data rates up to 19 2 kbps Two versions single mode and multimode Range up to 15 km 9 miles over single mode fiber Carrier controlled for transfer of control signal No external power required Metal case Card version Visit www rad com for latest product updates The FOM 8 is a sync async fiber optic modem operating full or half duplex over fiber optic cable It has a range of 15 km 9 miles over single mode fiber and operates at selectable data rates up to 19 2 kbps Asynchronous transmission up to 38 4 kbps Multidrop operation over a fiber link Transmission range up to 46 km 28 miles over single mode fiber R
10. RAD Data Communications 2006 Catalog Miniature short range modems offer the Same communications functions as AC powered modems but with fewer features such as limited diagnostics capability and no BER tests Usually they operate over shorter distances at lower rates normally up to 19 2 kbps However certain modems can operate at data rates up to 115 2 kbps in async transmission and up to 128 kbps in sync transmission Like AC powered modems miniature modems are designed to overcome distance limitations of standard data communications interfaces such as V 24 RS 232 They also overcome noisy environments and provide ground isolation Miniature short range modems connect computers terminals bridges routers and similar data communications devices inside buildings campuses or within city boundaries They support simple point to point communications as well as complex multipoint campus wide systems They also support flow control when connected to a printer or a multiplexer Typical communications problems such as distance limitations and noise are overcome by using special signal modulation and line equalization techniques that allow for error free transmission over longer distances RAD miniature modems have transformers to isolate the equipment from the line and ensure safety The transformers are rated at over 1 500 VRMS and are approved by carriers worldwide for connection to their lines What is the difference between i
11. RAD Data Communications 2006 Catalog Sync Async High Speed Fiber Optic Modem The FOM 9 is a miniature sync async fiber optic modem operating full or half duplex over fiber optic cable It has a range of 15 km 9 miles over single mode fiber and operates at selectable data rates up to 128 kbps The FOM 9 includes a built in BER tester that generates a 511 bit pattern and can be used for testing the link integrity Diagnostic loopbacks according to ITU V 54 can be activated for fault isolation Two types of diagnostic loops are supported local analog loop and remote digital loop The loopback options and the BER tester can be activated by toggling pin 18 or 21 on the V 24 RS 232 interface When set to asynchronous mode the modem internally converts the transmission to synchronous format in compliance with the ITU V 14 standard The FOM 9 includes innovative circuits that allow operation without external power by drawing low power from the DTE data and control signals In cases where the DTE cannot provide enough power the FOM 9 includes a special jack that can be connected to an external AC power supply adapter The modem has six LED indicators to display the status of the modem TD RD DCD RTS TEST and ERR High Speed Fiber Optic Modem The FOM 8H is a high speed fiber optic modem operating full or half duplex over fiber optic cable It has a range of 4 km 2 5 miles at data rates up to 56 kbps or 64 kbps The F
12. TS or data contention for multipoint operation Automatic disabling in the event of streaming Variety of optical options including multimode single mode and laser diode for extended range Visit www rad com for latest product updates The FOM 6MP async fiber optic modem operates over fiber to connect remote terminals and computers connected in multidrop to a central host Transmission range regardless of the data rate e 3 5 km 2 miles using 850 nm multimode fiber MINIATURE FIBER OPTIC MODEMS FOM 8 Sync Async Fiber Optic Modem 7 _ Cc Fiber optic cable FOM 8 FOM 8 The FOM 8 has diagnostic capabilities complying with the ITU V 54 standard Two loops are available local analog loop and remote digital loop These are activated by toggling pin 18 or 21 of the V 24 RS 232 interface In synchronous transmission the transmit timing can be selected for internal external or loopback clock Asynchronous transmission is converted internally to sync format in compliance with the V 14 FOM 6MP standard Different async formats are switch selectable Innovative circuitry design allows operation without external power by drawing low power from the DTE data and control signals The FOM 8 is packaged in a metal case for reduction of EMI RFI emissions The modem is available as a card for mounting in a 19 rack see CMN 16 nest card CMN CF8 Async Fiber Optic Multipoint Modem Fiber optic e 30 km
13. ange modem card e Accommodates copper and fiber optic i i CMN C6AC dual async multipoint short with V 54 loops compatible with ASM 11 modems i range modem card compatible with and with ASM 10 8 and SRM 8 in async e indicator LEDs on each card SRM 5AC SRM 6AC mode e V 54 diagnostics available with several CMN C6S sync short range modem card CMN CEB elastic buffer for connecting cards compatible with SRM 5S SRM 6S two independently clocked DCEs CMN C423 422 interface converter from RS 423 V 10 to RS 422 V 11 e Redundant power supply CMN C6SC sync multipoint short range modem card compatible with SRM 5SC Visit www rad com for latest product updates SRM 6SC Several plug in power supplies are available l CMN C6TX dual async 2 wire short range for 115 230 VAC and 48 VDC operation The CMN 16 compact modem nest is a space saving modem card compatible with SRM 5TX The card nest can be supplied with two rack that houses up to 16 short range modem cards totally independent plug in power supply Most of the cards carry two modems doubling the CMN C8 sync async short range modem capacity of the nest to up to 32 modems The nest card with V 54 loops compatible with provides an inexpensive solution to central site racking SRM 8 ASM 10 8 units providing redundancy and automatic backup A standalone 115 230 VAC high power version supports two card nests via SWAQGOW AONVWA LYOHS AANLVINIW of short range modems I
14. erminal unit RTU The FOM 485 allows connection of up to 32 RTUs to a single host at a wide range of data rates up to 115 2 kbps at typical distances up to 40 km 25 miles over single mode fiber 4 wire FOM 485 Main controller Fiber BE The FOM 485 supports full duplex transmission over 4 wire or half duplex over 2 wire cables It supports diagnostic capabilities complying with the ITU V 54 standard The modem has six LED indicators to display the status of the modem TD RD DCD RTS TEST and ERR FOM 485 RTU RAD Data Communications 2006 Catalog 12 SWAGOW JILldO YAEGIA AYNLVINIW SWAGOW AONVWA LYOHS AYANLVINIW 151 152 e Selectable sync or async operation e Selectable data rates from 9 6 kbps to 128 kbps e Range up to 15 km 9 miles over single mode fiber e Built in BER tester and V 54 diagnostic loop support e Carrier control mode for end to end signaling e LED indicators for status display Visit www rad com for latest product updates 128 kbps Fiber optic 128 kbps Ee 3 lf iL 15 km FOM 9 9 miles FOM 9 e Sync or async transmission at 56 kbps or 64 kbps e V 54 diagnostics e Range up to 4 km 2 5 miles over multimode fiber e Controlled or continuous carrier e V 24 RS 232 V 35 RS 530 or X 21 interface Visit www rad com for latest product updates JE N mm Fiber optic cable SS oe 56 or 64 kbps IBM 37X5 LOM ar FOM S BM 3174
15. le in a metal casing ordering option to increase data transmission security and EMI RFI immunity Asynchronous Fiber Optic Modems Fiber optic cable FOM 6A Async computer FOM 5A and FOM 6A are miniature fiber optic modems used for local data distribution connecting full or half duplex async computers and terminals A pair of modems ensures integrity of data transmission over multimode fiber optic cables for distances up to 3 km 1 9 miles at data rates up to 19 2 kbps The FOM 5A is a sub miniature version of the FOM 6A offering all the features in half the size FOM 5A Async terminal Innovative circuitry allows the modems to operate without external power by drawing low power from the DTE data and control signals The FOM 5A and FOM 6A have a V 24 RS 232 interface and are available with either a male or female integral 25 pin connector The modem is available as a card for mounting in a 19 rack see the CMN 16 nest card CMN CF6A e Data rates MME selectable up to 19 2 kbps MME V 35 56 64 kbps e Interfaces MME RS 232 V 24 MME V 35 V 35 e Range of 100m 330 ft on each side e Selectable RTS to CTS delay e Carrier controlled or constantly ON Visit www rad com for latest product updates The MME and MME V 35 miniature modem eliminators replace two synchronous modems permitting direct DTE to DTE connection They have a maximum range IBM 37X5 MODEM ELIM
16. n addition to short range CMN C8H sync async high speed short cable and card connection Hea the nest Supports interface converters fiber range Modem card with V 54 loops The CMN 16 is available as a 19 rack optic modems and elastic buffers compatible with SRM 8H mount endosure and 162U 3 5 high The CMN 16 is compatible with the SRM short range CMN CF6A dual async fiber optic short modem family and has the added capability of range modem card compatible with displaying activity on the interface signals FOM 5A FOM 6A CMN 16 A 4 wire async _ Elastic buffer 4 wire Elastic 5 A SRM 6AC b uffer SE P i 19 2 kbps Multidrop _ sync async SRM 8 RS 422 Fiber optic SRM 8 FOM 8 Fiber optic Fiber optic a SRM 8 FOM 5A High 56 64 kbps Fiber optic speed J SRM 8H FOM 6A IBM 3174 RS 423 422 converter RAD Data Communications 2006 Catalog 147 148 Full duplex transmission over 2 wires in synchronous transmission Data rates up to 128 kbps Transmission range up to 8 km 5 miles independent of data rate Supports IDSL technology ISDN U interface Works opposite the ASMi 31 modem including remote control and monitoring and LRS 24 modem rack ASMi 31 2C Visit www rad com for latest product updates Selectable sync or async operation V 54 local and remote diagnostics Full or half duplex operation over 4 wires Selectable data rates 56 or 64 kbps Range up
17. ns 2006 Catalog _ No SYOLVNIWITH WAGOW SWAGOW JIiLdO YAGIA AYNLVINIW 155
18. nterface powered and AC powered modems Interface powered and AC powered modems perform the same basic communications functions Interface powered modems incorporate innovative VLSI and hybrid circuitry that enable them to consume very little power These modems draw power from the interface signals without loading the adjacent equipment or interfering with normal operation For computers that do not support control Signals there are special models that derive their power solely from the data signals How do you select the right modem for your application Several factors should be considered when selecting a modem e Computer DTE interface V 24 RS 232 Nis Deere e Communication method sync async or both e Data rate e Distance e Media twisted pair coax fiber e Point to point or multipoint application e Control signals does the application require transmission of data only or also transmission of one or more control signals e Environment is the environment noisy A Quick Reference Guide on pages 158 159 will help you select the most suitable modem for your application MINIATURE SHORT RANGE MODEMS J CMN 16 Compact Modem Nest The following cards are available CMN CF8 sync async fiber optic modem e High density modem rack CMN C6A dual async short range modem card with V 54 loops compatible with e 2U high card compatible with SRM 5A SRM 6A POM G SRM 3A CMN C11 async short r
19. onducted interference for high noise immunity Connection to the line is usually via a 5 screw 4 wire and ground terminal block Optional connectors available for the SRM 6AC are RJ 12 and RJ 45 The SRM 5AC has both terminal block and RJ 12 or RJ 45 as its line connectors The modems are also available as a card for mounting in a 19 rack see the CMN 16 nest card CMN C6AC 149 RAD Data Communications 2006 Catalog 150 e 4 wire full duplex e Selectable data rates up to 19 2 kbps e Range up to 5 km 3 0 miles at 9 6 kbps e Full or half duplex point to point e LED indicator for carrier detect e No external power required e Line connector options terminal block RJ 12 and RJ 45 Visit www rad com for latest product updates 4 wire e fii SRM 5S SRM 5S Sync Sync terminal computer e 4 wire full or half duplex e Selectable data rates 1 2 to 19 2 kbps e Range up to 5 km 3 miles at 9 6 kbps e Transfers one control signal e Internal external or loopback clock e No external power required e LED indicator for carrier detect SRM 5SC only e Line connector options terminal block RJ 12 and RJ 45 Visit www rad com for latest product updates The miniature SRM 5SC and SRM 6SC are short range modems connecting full or half duplex synchronous terminals controllers and computers in point to point or point to multipoint applications The modems operate at data rates from 1 2 kbps to 19
20. s a high speed short range modem operating full duplex over twisted Pair unconditioned telephone lines It has an extended range of 4 5 km 2 8 miles for 24 AWG at data rates of 56 or 64 kbps The SRM 8H has diagnostic capabilities complying with ITU V 54 standard Two loops are available local analog loop and remote digital loop The modem s carrier can be strapped for either continuous or switched operation controlled by the RTS signal for passing control signals Transmit timing can be selected for internal external or loopback clock Four LED indicators monitor Transmit Data Carrier Detect Test and Power Four interface models are available RS 232 V 24 V 35 X 21 and RS 530 Power is provided by a standard wall mounted power supply Connection of modems to the line is usually via a 5 screw terminal block Other connectors available are RJ 12 and RJ 45 The modem is also available as a card version for mounting in a 19 rack see the CMN 16 nest card CMN C8H Approximate Range at 56 64 kbps Gauge 19 AWG 24 AWG 26 AWG 0 9mm 0 5mm 0 4 mm Range 10 km 4 5 km 3 2 km 6 0 miles 2 8 miles 2 0 miles e SRM 5A 6A 4 wire full duplex SRM 6L 4 wire full or half duplex e Internal filter for high noise immunity SRM 5A e Insensitive to wire polarity SRM 6L e Data rates up to 19 2 kbps e DCE DTE switch e No external power required e Transformer line isolation e Available as a card for
21. ved from the receive signal The carrier can be strapped for continuous operation or switched operation controlled by the RTS Signal The units have an RS 232 C V 24 interface and are available with a choice of a male or female integral 25 pin connector for the DTE interface and a 5 screw 4 wire and ground terminal block for the line Optional line connectors available for the SRM 6SC are RJ 12 and RJ 45 The SRM 5SC has both a terminal block and RJ 45 or RJ 12 as its line connectors The modem is also available as a card version for mounting in a 19 rack see the CMN 16 nest card CMN C6SC RX RX SRM 6SC SRM 5SC q Sync TX computer RX SRM 5SC TX RX SRM 5SC Sync terminal Approximate Range for 24 AWG 0 5 mm Data Rate kbps km miles 19 2 4 5 2 8 9 6 5 0 3 0 4 8 6 0 3 7 1 2 2 4 6 5 4 0 e RS 232 V 24 on 9 pin connector e 4 wire full duplex e Data rates up to 19 2 kbps e Transformer isolated e No external power required e Compatible with the SRM 5A and SRM 6A Visit www rad com for latest product updates 4 wire SRM 3A SRM 3A jl Laptop computer Mainframe e Converts from RS 485 to fiber e Asynchronous transmission up to 115 2 kbps e Transmission range up to 40 km 25 miles over single mode fiber e Full duplex over 4 wire or half duplex over 2 wire e V 54 diagnostics e LED indicators for status display Visit www rad com for latest product updates MINIATURE SHORT
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