HA20 Digital Gas Controller

2-channel gas detection system with configurable control, flexible application and user-friendly operation.

Product overview:

The HA20 digital gas controller provides simultaneous display and alarm functions for two sensor transmitters, along with user-friendly operation and configuration flexibility.

The HA20 accepts sensor inputs for gas concentration and other atmospheric data. It can function as a standalone device or it can be integrated into a fire and gas system. The controller features NEMA4X enclosures and meets Class I, Div. 2, Group A, B, C, D requirements. Explosion-proof wall-mount packaging options are also available.

The controller features a large graphical LCD readout that displays monitored data as bar graphs, trends and engineering units. A magnetic and touch keyboard allows non-intrusive operation in potentially dangerous locations. Cal Mode offers push-button zero / span calibration for direct sensor interface applications. Authorization mode allows blocking of critical configuration variables.

Other standard features include Modbus TCP/IP communications, three independent alarm levels per channel, alarm relays, flexible mounting options and 4-20m inputs. The 4-20 mA inputs are ideal for interfacing with sensor transmitters that may be at long distances from the controller. 24 VDC at 8 watts provides power to an external device. Controllers accept inputs from two.

Additional Features and Benefits:

Improved technology:

• Accepts inputs from up to two 4-20 mA sensor transmitters. Generates 24 VDC at 8 watts of external device power

Fit for purpose:

• CSA certified to C22.2 NO. 152 for fuel detection and Class I, Div. 2, Groups A, B, C, D CE
• Magnetic and touch keyboard for non-intrusive operation in potentially hazardous locations
• NEMA 4X (Div. 2 certified) and explosion proof wall mount packaging options available
• Three standard SPDT common alarm relays for HORN, HIGH, WARN or FAULT

Advanced Communications:

• 3 independent alarm levels per channel. Relay Recognition feature allows silencing external audible devices during existing alarm conditions
• Graphical LCD readout displays monitored data as bar graphs, trends and engineering units. The alarm LED flashes when new and is steady after being acknowledged
• Cal Mode offers pushbutton zero / span calibration for direct sensor interface applications. Authorization mode allows blocking of critical configuration variables

Features and Benefits:

• Accepts inputs from up to two 4-20 mA sensor transmitters
• Magnetic and touch keyboard for non-intrusive operation
• 3 independent alarms per channel

Quick Specifications:

• Display: 128 x 64 pixel graphic LCD with backlit screens
• Power requirement: 100-240 VAC / 24 VDC
• Operating temperature: -25°C to +50°C