Description
The Honeywell 05701-A-0302 is a single-channel control card designed for the System 57 gas detection architecture. It acts as the intelligent interface between a gas sensor and the central monitoring system, providing localized processing, display, and alarm functions.
Product Parameters (Datasheet)
- Model Number: 05701-A-0302
- Series: System 57
- Channel Type: Single Channel
- Input Signal: 4-20 mA or Bridge (Catalytic Bead) inputs
- Power Consumption: < 3 Watts
- Display: 4-digit LCD (Backlit) with 30-segment bar graph
- Alarm Levels: 3 Configurable alarm setpoints (A1, A2, A3)
- Output Relays: 3 Alarm relays + 1 Fault relay (Form C, SPDT)
- Analog Output: Isolated 4-20 mA proportional to gas concentration
- Operating Temperature: -5°C to +55°C
HONEYWELL 05701-A-0302
HONEYWELL 05701-A-0302
HONEYWELL 05701-A-0302
Country of Origin
This safety instrumentation component is engineered and manufactured by Honeywell Analytics (formerly Zellweger Analytics) in the United Kingdom.
Application Fields
The 05701-A-0302 is widely deployed in industrial safety systems:
- Oil & Gas Facilities: Monitoring for combustible gas leaks around wellheads and separators.
- Chemical Plants: Detecting toxic gas concentrations in process areas and storage rooms.
- Water Treatment: Measuring Chlorine or Ozone levels in disinfection zones.
- Manufacturing: Monitoring oxygen depletion or solvent vapors in confined spaces.
- Car Parks: Measuring Carbon Monoxide (CO) and NO2 for ventilation control.
Product Usage Instructions
- Chassis Integration: Slide the card into a standard System 57 rack (5701 or 5704 series). Ensure the card is correctly aligned with the backplane connectors.
- Sensor Selection: Use the onboard DIP switches or the Engineering Keypad to select the input type (e.g., 2-wire 4-20mA, 3-wire 4-20mA, or mV Bridge).
- Alarm Configuration: Set the “Rising” or “Falling” alarm directions and latching/non-latching relay behavior based on the target gas properties.
- Calibration: Perform zero and span adjustments using the front-panel “Mag-Key” interface or a remote engineering terminal without opening the rack.
- Relay Wiring: Connect the dry contacts to local beacons, sirens, or the plant-wide Emergency Shutdown (ESD) system.
Product Technical Description
The 05701-A-0302 is a self-contained monitoring unit. It processes the raw analog signal from the field sensor, applies linearization and temperature compensation, and drives a local LCD display. The bar graph provides an immediate visual indication of the gas level relative to the full-scale range. Technically, it features high-integrity software diagnostics that constantly monitor the health of the sensor and the internal circuitry. If a sensor wire is cut or the sensing element fails, the card immediately trips the “Fault” relay and changes the display status. Its modular nature allows for easy expansion; if a new gas point is added to the plant, a new 05701-A-0302 card can simply be plugged into a spare rack slot.
Q&A (Common Questions)
Q: What is the difference between the 05701-A-0301 and the 05701-A-0302? A: The 0302 version is the standard single-channel control card with full display and relay capabilities. Variations in part numbers usually refer to specific firmware versions or relay contact ratings.
Q: Can I use this card with a flammable gas sensor? A: Yes, it supports catalytic bead (Bridge) sensors which are standard for LEL (Lower Explosive Limit) monitoring of combustible gases.
Q: How do I perform a “Bump Test”? A: You can use the front-panel “Test” function to simulate a gas level, verifying that the internal relays and external sirens activate correctly without using actual test gas.
Q: Does it support Modbus communication? A: Individual cards output 4-20mA. For digital communication, a System 57 Modbus Interface Card (05701-A-0322) must be added to the rack.
Similar Model Recommendations
- Honeywell 05704-A-0144 (Four-channel control card)
- Honeywell 05701-A-0322 (Modbus Interface Module)
- Honeywell 05701-A-0301 (Legacy 5701 series card)
- Honeywell Sensepoint XCD (Standard compatible gas transmitter)
- Honeywell 05701-A-0406 (Power Supply Module for System 57)
For technical support or to procure the Honeywell 05701-A-0302, please contact our gas detection systems division.
