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RAD SRM-6A SRM-6D Asynchronous Short Range Modems

Call us for Pre-sales and discount pricing

  301-924-7400 Support

RAD SRM-6A SRM-6D Asynchronous Short Range Modems
 

FEATURES

    • The SRM-6A and SRM-6D, Asynchronous Short Range Modems, are used for local data distribution, connecting full duplex asynchronous DTEs to computers or controllers.
    • A pair of modems will ensure integrity of data transmission, using unconditioned 4-wire twisted pair lines at data rates up to 19.2 kbps. SRM-6A and SRM-6D operate over distances up to 8 km (5 miles), depending on the wire gauge and data rate (see Table 1).
    • SRM-6A and SRM-6D are available as standalone units or as rack-mount cards for mounting in the CMN-16 modem rack (see the CMN-16 folder for further information).
    • SRM-6A is supplied with an isolating transformer. (SRM-6D is supplied without one.) This transformer, in conjunction with other circuitry, protects against AC or DC overvoltages. As the transformers are rated at over 1,500 VRMS, SRM-6A 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.
    • Innovative circuitry allows the modems to operate without connection to the mains supply, by using ultra-low power from the data and control signals.
    • The low transmit level of 0 dBm minimizes cross-talk onto adjacent circuits within the same cable. Data is transmitted and received using a balanced interface. This ensures high immunity to circuit noise.
    • The modems feature a switch-selectable DCE/DTE option. This permits them to operate as DTE for connection to another DCE (such as a multiplexer port), without the use of a cross-cable.

SPECIFICATIONS 

  • Asynchronous, full duplex
  • Data rates up to 19.2 kbps
  • Transmission range (for 24 AWG):
    SRM-6A: up to 8 km (5.0 miles)
    SRM-6D: up to 8 km (5.0 miles)
  • No AC power required
  • Transformer isolated
    (SRM-6A and SRM-6AU only)
  • DCE/DTE switch
  • Plugs directly into V.24/RS-232 connector
  • Compact, lightweight, easy to install
  • Available as a standalone unit or as a card for mounting in a 19" modem rack
  • Internal filter for high noise immunity and noise suppression
    (SRM-6AU only)

SRM-6A/*/+
Async Short Range Modem, transformer 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:
F for female
M for male
+ Specify line interface:
RJ-11 for RJ-11 jack
RJ-45S for RJ-45 jack
RJ-45 for RJ-45 plug on 2m / 6 ft cable
(Default is Terminal Block)
 

ORDERING
 
SRM6A/F
SRM6A/F/01
SRM6A/F/01/RJ11
SRM6A/F/RJ11
SRM6A/F/RJ45
SRM6A/F/RJ45S
SRM6A/M
SRM6A/M/01/RJ11
SRM6A/M/RJ11
SRM6A/M/RJ45
SRM6A/M/RJ45S
 

SRM6AU/F
SRM6AU/F/RJ11
SRM6AU/F/RJ45S
SRM6AU/M
SRM6AU/M/RJ11
SRM6AU/M/RJ45S

APPLICATIONS

 

RAD Products

For discount pricing on RAD Data Communications
email us at sales@data-connect.com
or call 301-924-7400


     

1-301-924-7400
Sales Ext 17   Support Ext 25

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Olney, Maryland 20832