Stafford, Texas

PR 4131 Universal Trip Amplifier

Category Tag Brand:

PR 4131 Universal Trip Amplifier

  • Input for RTD, TC, Ohm, potentiometer, mA and V
  • 2 adjustable alarm limits
  • FM-approved for installation in Div. 2
  • 2 relay outputs
  • Universal AC or DC supply


  • Programmable via detachable display front (4501), process calibration, relay simulation, password protection, error diagnostics, and selection of help text in several languages.


  • Process control with 2 pairs of potential-free relay contacts that can be configured to suit any application.
  • Trip amplifier with window function defined by a high and a low setpoint. The relay changes state outside the window.
  • Relay latch function, where the relay is activated and can only be reset manually.
  • Sophisticated sensor error surveillance, where one relay holds the state immediately prior to the sensor error while allowing the process to continue.
  • The other relay can be set for sensor error alarm so that the defective sensor can be replaced immediately.

Technical characteristics

  • When 4131 is used with the 4501 display/programming front, all operational parameters can be modified to suit any application.
  • As the 4131 is designed with electronic hardware switches, it is not necessary to open the device for the setting of DIP-switches.
  • A green front LED indicates normal operation and malfunction. A yellow LED is ON for each active output relay.
  • Continuous check of vital stored data for safety reasons.
  • 3-port 2.3 kVAC galvanic isolation.