Honeywell HA20 Two-Channel and HA40 Four-Channel Digital Gas Controllers 

The Honeywell digital gas controllers are designed to work in the harshest industrial or commercial environments. A NEMA4x and explosion proof enclosure allows you to place the controllers in all hazardous locations to monitor for toxic gases, combustible gases, and oxygen deficiency.

The controllers are easy to install and feature large graphical LCD display, standard 4-20mA inputs, and non-intrusive inputs for hazardous areas. An optional RS-485 Modbus slave port allows up to 128 HA40’s to be multi-dropped onto a single data highway for interrogation by another Modbus master. A 10-BaseT Ethernet cable is also available for utilizing the popular Modbus TCP/IP protocol.

Key Specifications

  • Accepts inputs from up to two (HA-20) or four (HA-40) 4-20mA sensors or  transmitters.
  • Three independent alarm levels per channel. Relay Acknowledge feature allows silencing of external audible devices during existing alarm conditions
  • Graphic LCD readout displays monitored data as bar graphs, trends and engineering units. Alarm LED’s flash when new and become steady after acknowledged
  • Two standard SPDT common alarm relays for HORN, HIGH, WARN or FAULT
  • CSA certified for combustible detection and Class I, Div. 2, Groups A-D, CE mark

Supporting Documentation

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