SEC 3100 ISO Repeater

  • ISO repeater for gas detection equipment
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The SEC 3100 ISO Repeater extends the distance and increases the number of devices to the RS-485 network.  The SEC 3100 ISO Repeater provides a 1500V ground isolated RS485 interface.  The SEC ISO Repeater is a bidirectional bitwise data translator specifically designed for the 9600 Baud Modbus interface. This is used by the SEC 3100/SEC 3500 gas detection equipment.  The 3100 ISO Repeater isolates the interface from the ground noise interference. This extends the wiring distance, and allows more transmitters to be used on a single loop.  It has an explosion proof housing for hazardous gas detection applications. The SEC 3100 ISO Repeater has three (3) ¾” NPT threaded connectors for mounting and wiring the sensor and transmitter into a permanent installation.  3100 ISO Repeaters operate on 24 VDC.  There are three (3) LED’s that indicate activity on Channel 1, Channel 2 and the Power.   For an installation diagram for the SEC 3100 ISO Repeater click here.


  • Extends distance between devices
  • Increases number of devices on RS-485 network
  • Explosion Proof
  • Isolated bi-directional data flow
  • Transient suppression on RS-485 data lines
  • Refineries
  • Drilling/Production Platforms
  • Fuel Loading Facilities
  • Oil Well Logging
  • LNG/LPG Processing and Storage Facility
  • Gas Turbines
  • Chemical Plants
  • Compressor Stations
  • Waste Water Treatment Facilities
  • Transportation Facilities

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