Honeywell 05701-A-0302 Control Module

Honeywell 05701-A-0302 Control Module (System 57 / Sieger Gas Detection Single Channel Control Card – Catalytic Version)

 

 

The Honeywell 05701-A-0302 is a single-channel gas detection control card used in the Honeywell System 57 (Sieger 5701 series). It is designed to monitor one gas detector channel and provide display, alarm, and relay output functions for industrial safety systems.

Product Information

• Brand: Honeywell Analytics (Sieger / System 57)
• Model: 05701-A-0302
• Type: Single-channel control card (catalytic sensor version)
• System: Honeywell System 57 / 5701 gas detection system
• Function: Gas monitoring + alarm processing + local display
• Input type: Catalytic bead / gas detector interface (system dependent)
• Output: Relay alarm outputs (A1 / A2 / fault signals depending configuration)
• Mounting: Rack-mounted plug-in control card

What it actually is

This module is the “control brain for one gas detection channel” inside a rack system.

It:

• Reads signal from a gas sensor (flammable/toxic gas detector)
• Displays gas concentration on front panel
• Triggers alarms (A1, A2, fault)
• Sends relay outputs to external devices

It does NOT:

• Control machinery like a PLC ❌
• Act as general automation controller ❌
• Work as standalone PLC module ❌

System Role (Simple)

Gas sensor →
05701-A-0302 control card (this unit) →
Alarm system / relay outputs →
Siren / beacon / ventilation / shutdown

So it acts like a “single-channel gas detection controller inside a rack system.”

Key Features

• Single-channel gas monitoring control card
• Built-in LCD display for gas reading
• LED indicators for alarm status (A1 / A2 / fault)
• Push-button reset and channel selection
• Microprocessor-based control logic
• Supports catalytic gas sensors (flammable gas detection version)

Typical Applications

• Industrial gas detection systems
• Oil & gas facilities
• Refineries and petrochemical plants
• Chemical plants
• Confined space monitoring
• Safety alarm and ventilation control systems

Advantages

• Real-time gas concentration monitoring
• Integrated display + alarm logic in one card
• Easy modular rack replacement
• High reliability for safety-critical systems
• Designed for continuous industrial operation

Important Notes

• Not PLC CPU ❌
• Not PLC I/O module ❌
• Not general control module ❌
• Not sensor ❌
• It is a gas detection single-channel control card (System 57 rack module) ✔
• Works only inside Honeywell 5701/System 57 rack system

Precautions

• Must match correct sensor type (catalytic / toxic / 4–20mA version)
• Requires correct rack configuration
• Not interchangeable with other System 57 card variants without checking type
• Calibration may be required after replacement
• Handle carefully (PCB + display module)