DC Voltage/Current Input Intelligent Alarm 811A 812A

The 811A 812A accept ±110V or 0 to 22 mA DC input ranges or 2 input channels (AC Current with optional sensor input). They provide a single or dual mechanical relays output using 10-36V DC Power. Software configured for multi function alarms – limit, window, deviation, rate of change, peak/valley detection with on/off controller capability.


811A-0100: Alarm with one DPDT relay

811A-0200: Alarm with two SPDT relays

812A-0200: Dual alarm with two SPDT relays

Acromag’s 811A 812A is a DC Voltage/Current Input Intelligent Alarm Module.

Firstly, these modules are part of the Acromag Intellipack family. Intellipack alarms compare inputs against user defined limit set points to control built in relays.

Secondly, each unit offers a selection of input ranges and alarm functions to handle a broad range of applications. Reconfigure the unit for different ranges or functions. Alarm functions available on all models include on/off controller, limit alarm, window alarm, deviation alarm, rate-of-change alarm, and peak/valley detection.

Thirdly, setup is very easy. Configuration is through Windows 7 or newer program. Use the front-panel push-buttons and status LEDs to perform field adjustments. Once configured, IntelliPacks operate independent of any host computer.

Features of the DC Voltage/Current Input Intelligent Alarm 811A 812A include:

  • Integrated micro-controller performs intelligent signal processing for advanced alarm functions
  • Windows 7 or newer software configuration speeds setup and replacement
  • Push-button re-programmability facilitates changes in the field without a host PC
  • Multi-purpose inputs accept numerous ranges to reduce spare stock requirements
  • As well as a High-resolution Sigma-Delta A/D converter delivers high accuracy with low noise
  • Input excitation supply on each input provides power for a two-wire transmitter
  • Also the dual alarm operation lets you perform two alarm functions at the same time


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