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The SRM-5A is an asynchronous modem used for local communication between a datalogger and a computer. Two SRM-5A Short Haul Modems are required; one at the datalogger end and one at the computer end. Each short haul modem transmits over an unconditioned 4-wire telephone line or the CABLE2TP two-twisted pair cable. Data rates up to 9,600 bps are possible.

Benefits and Features

  • Provides the easiest link for communicating with one datalogger over longer distances
  • Low voltage transmission levels minimize crosstalk between adjacent lines within the same cable.
  • Data are transmitted and received at a balanced impedance, providing excellent immunity to circuit noise.
  • Transmits up to 6.2 miles using 19 gauge cable at 9600 bps
  • Transmits up to 7.6 miles at 1200 bps

Resources and Links

Ships With

(1) Manual from original mfg--the operation of the RAD modems is discussed in the manual for the SC932A interface; therefore, a Campbell Scientific produced manual entitled "RAD" or SRM-5A" is not available.

Shipping Weights & Dims

Single Box Shipping Weight:
     1.0 lb
     454 g

Single Box Shipping Dimensions:
     6" x 6" x 6"
     15.2 x 15.2 x 15.2 cm