ORDERING SRM-6A, 6D SRM-6A/*/+ Asynchronous Async Short Range Modem, transformer Short Range Modems isolated SRM-6AU/*/+ Async Short Range Modem, transformer isolated, with built-in noise filter SRM-6D/*/+ Async Short Range Modem * Specify 25-pin connector type: for female F M for male + Specify line interface: RJ-11 for RJ-11 jack RJ-45S for RJ-45 jackf RJ-45 for RJ-45 plug on 2m / 6 ft cable (Default is Terminal Block) Specifications are subject to change without prior notice. 100-100-05/99  1999 RAD Data Communications Ltd. Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com FEATURES APPLICATION DESCRIPTION • The SRM-6A and SRM-6D, Asynchronous • Asynchronous, full duplex Short Range Modems, are used for local • Data rates up to 19.2 kbps data distribution, connecting full duplex asynchronous DTEs to computers or • Transmission range (for 24 AWG): controllers. SRM-6A: up to 8 km (5.0 miles) • A pair of modems will ensure integrity of SRM-6D: up to 8 km (5.0 miles) data transmission, using unconditioned 4-wire twisted pair lines at data rates up to • No AC power required 19.2 kbps. SRM-6A and SRM-6D operate • Transformer isolated over distances up to 8 km (5 miles), (SRM-6A and SRM-6AU only) depending on the wire gauge and data rate • DCE/DTE switch (see Table 1). • SRM-6A and SRM-6D are available as • Plugs directly into V.24/RS-232 standalone units or as rack-mount cards connector for mounting in the CMN-16 modem rack • Compact, lightweight, easy to install (see the CMN-16 folder for further information). • Available as a standalone unit or as a • SRM-6A is supplied with an isolating card for mounting in a 19" modem transformer. (SRM-6D is supplied without rack one.) This transformer, in conjunction with other circuitry, protects against AC or DC • Internal filter for high noise immunity overvoltages. As the transformers are and noise suppression rated at over 1,500 VRMS, SRM-6A (SRM-6AU only) modems are suitable for connection to local circuits provided by most national telephone administrations (P.T.T.s). • SRM-6AU is equipped with an internal filter (see Ordering). The internal filter of SRM-6AU is designed to overcome both radiated and conducted interference for high noise immunity, and is recommended for noisy environments such as industrial locations. SRM-6A is available without an internal filter. Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com • Innovative circuitry allows the modems to Table 1. Approximate Range SPECIFICATIONS operate without connection to the mains supply, by using ultra-low power from the • Data Rates Data 19 AWG 24 AWG 26 AWG data and control signals. Rate (0.9 mm) (0.5 mm) (0.4 mm) Up to 19.2 kbps • The low transmit level of 0 dBm minimizes kbps km miles km miles km miles • Transmission Line cross-talk onto adjacent circuits within the 4-wire, unconditioned line SRM-6A same cable. Data is transmitted and (two twisted pairs), 19-26 gauge received using a balanced interface. This 19.2 4.5 2.5 2.0 1.0 1.5 1.0 • Transmission Mode ensures high immunity to circuit noise. 9.6 13.5 8.0 6.0 3.5 4.5 2.5 Asynchronous, full duplex, 4-wire operation • The modems feature a 4.8 16.8 10.5 7.5 4.5 5.6 3.5 switch-selectable DCE/DTE option. This • Transmission Controls permits them to operate as DTE for 2.4 18.0 11.0 8.0 5.0 6.0 3.5 DSR (Circuit 107) and DCD (Circuit 103) connection to another DCE (such as a turn on immediately after DTE activates 1.2 18.0 11.0 8.0 5.0 6.0 3.5 multiplexer port), without the use of a DTR (Circuit 108/2). SRM-6AU cross-cable. CTS (Circuit 106) turns on immediately 19.2 2.0 1.0 1.0 0.5 0.5 0.5 after DTE activates RTS (Circuit 105). 9.6 6.4 4.0 3.5 2.0 2.5 1.5 • Transmission Level 4.8 6.4 4.0 3.5 2.0 2.5 1.5 0 dBm • Transmission Range 2.4 6.4 4.0 3.5 2.0 2.5 1.5 For 24 AWG: 1.2 6.4 4.0 3.5 2.0 2.5 1.5 SRM-6A: up to 8 km (5 miles) SRM-6D SRM-6AU: up to 3.5 km (2 miles) 19.2 12.0 7.5 5.0 3.0 3.5 2.0 SRM-6D: up to 8.0 km (5.0 miles) (see Table 1) 9.6 13.0 8.0 6.0 3.7 4.5 2.5 • Digital Interface 4.8 14.0 8.5 7.0 4.4 5.0 3.0 EIA RS-232/ITU V.24, integral 25-pin 2.4 14.5 9.0 8.0 5.0 6.0 3.5 connector, male or female 1.2 14.0 8.5 8.0 5.0 6.0 3.5 • Line Interface 5-screw (4-wire and ground) terminal block. Optional interface (see Ordering): − RJ-11 jack, mounted directly − RJ-45 plug, on a 2m / 6 ft cable − RJ-45 jack, mounted directly (see Figures 1 and 2) Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com • Power Declaration of Conformity INSTALLATION For proper operation, at least one of the following digital interface connector Caution. This is a delicate instrument. Be careful Mfr. Name: RAD Data Communications Ltd. (DB-25) pins must be active: when setting jumpers or performing any actions Mfr. Address: 12 Hanechoshet St. within the product so that you do not break or − DCE mode: 2, 4, 20 or 24 Tel Aviv 69710 shake any components. − DTE mode: 3, 6, or 8 Israel The typical power consumption drawn from Installation of the modems is simple and declares that the product: the DTE is 20 mW for SRM-6A and 12 mW straightforward. Follow these instructions: for SRM-6D (at least +6V signal level). Product Name: SRM-6A, SRM-6D 1. Open the plastic cover by pressing on the places marked on the sides – start at • Physical Conforms to the following standard(s) or other the cable end. Length: 110 mm / 4.3 in normative document(s): Width: 52 mm / 2.1 in 2. Connect the 4-wire line to the modem EMC: EN 55022 (1987): Limits and methods of Height: 22 mm / 0.9 in line connector. measurement of radio disturbance Weight: 85 g / 3.0oz characteristics of information technology • If using the terminal block: • Environment equipment. Connect each lead of the 4-wire line to Temperature: 0-50°C / 32-122°F EN 50082-1 (1992): Electromagnetic the appropriate screw connector on the compatibility - Generic immunity Humidity: up to 90%, terminal block. standards for residential, commercial and non-condensing • If using the RJ-11 or RJ-45 connector: light industry. Plug the cable into the RJ jack. Verify that the connection is as follows: Supplementary Information: − Local XMT connected to remote The product herewith complies with the requirements of the EMC Directive 89/336/EEC. RCV The product was tested in a typical configuration. − Local RCV connected to remote XMT. Tel Aviv, December 28th, 1995 Figure 1. RJ-11 Pin Assignment Caution: Do not touch the transformer while connecting the terminal; it may brake under pressure. Haim Karshen Note: When operating in a noisy environment, use Quality Manager shielded cables and connect the cable shield to European Contact: RAD Data Communications GmbH, "Ground". Ground is provided on the line connector Lyoner Strasse 14, 60528 Frankfurt am Main, Germany (terminal block or RJ-11/45 connectors) for this purpose (see Figures 1 and 2 for Pin Assignment). Figure 2. RJ-45 Pin Assignment Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com 3. The modem is factory strapped to DCE. For operation as DTE, set the DCE/DTE switch to DTE (see Figure 3). Figure 3. DCE/DTE Switch Configuration 4. To close the unit, press the two halves of the cover together. 5. Connect the modem directly to the 25-pin connector of the DTE or the computer and fasten with both screws – one on each side of the modem connector. Order from: Cutter Networks Ph:727-398-5252/Fax:727-397-9610 www.bestdatasource.com