Honeywell 05701-A-0351 gas detector Control card

Honeywell O5701-A-0351 is a gas detector Control Card for industrial safety monitoring systems, belonging to the highly regarded Signalpoint or System 57 control system series.

This component is very common in petroleum, chemical and semiconductor factories, mainly used to receive signals from remote sensors and drive alarm devices.

Core parameters and functions of the product

Full model name: Honeywell O5701-A-0351 (abbreviated as 5701 Control Module in some documents)

Type: Single Channel Control Card.

Input signal: * Receives 4-20mA standard industrial signals from gas detectors (such as catalytic combustion type, electrochemical type or infrared detector).

It can also support mV bridge circuit signals (for certain specific catalytic combustion probes).

The display interface: The front of the module is equipped with a 3-digit digital liquid crystal display (LCD), which can display the gas concentration, fault code and alarm status in real time.

Output control: It is equipped with multi-level relay output (typically: low alarm A1. high alarm A2. Fault), which is used to interlock sound and light alarms or shut-off valves.

1. Physical Structure and panel description

This card adopts a plug-and-pull design and is usually installed in a 5701 Rack.

LED indicator light

AL1/AL2 (red) : Concentration exceeds the set threshold.

Fault (yellow) : Detector disconnection, short circuit or internal fault of the module.

Inh (amber) : Maintains the inhibited state (Inhibit).

Key operation: There are usually hidden keys at the bottom of the panel, which are used to Reset the alarm or enter the menu for zero point/range calibration.

2. Core technical features

Flexibility: Supports software programming and setting of parameters such as alarm points, lag amounts, and delay times.

Stability: Industrial-grade isolation design, strong resistance to electromagnetic interference (EMC).

Compatibility: It is compatible with Sensepoint, Searchline Excel under Honeywell and most third-party 4-20mA transmitters.

3. Common Application Scenarios

Combustible gas monitoring: Monitoring the leakage of methane, hydrogen or liquefied gas in the environment.

Toxic gas monitoring: Monitor low-concentration toxic gases such as carbon monoxide and hydrogen sulfide.

Hypoxia monitoring: Online monitoring of oxygen concentration in industrial sites.