The Honeywell 05701-A-0326 is a versatile, high-reliability single-channel control card designed for the System 57 gas detection series. It provides a localized interface for gas sensors, offering real-time monitoring and alarm functions to protect personnel and assets. This module is specifically engineered to accept inputs from a wide variety of gas detectors, including catalytic bead and 4-20mA transmitters, making it a flexible solution for complex safety systems.
Key Product Specifications
- Model Number: 05701-A-0326
- System Series: Honeywell System 57
- Channels: 1 (Single Channel)
- Input Compatibility: 2-wire/3-wire 4-20mA, Catalytic bead (Bridge), or Electrochemical sensors
- Display: 4-digit LCD with backlighting and multi-segment bar graph
- Relays: 3 Programmable alarm relays + 1 Fault relay
- Operating Voltage: 18 V DC to 32 V DC (24 V Nominal)
- Power Consumption: Max 3.5 W
- Dimensions: 170 mm x 25 mm x 120 mm
- Weight: 0.35 kg
- Country of Origin: United Kingdom
Application Fields
The 05701-A-0326 is critical in safety-monitored environments, such as:
- Chemical Plants: Detecting toxic gas leaks in processing and storage areas.
- Marine & Offshore: Providing ruggedized gas monitoring in high-vibration environments.
- Manufacturing: Monitoring for combustible gas buildup in industrial ovens or spray booths.
- Tunneling & Mining: Ensuring safe breathing air by detecting carbon monoxide or methane levels.
Usage Instructions
- Mechanical Installation: Insert the card into a 19-inch System 57 rack. Ensure the card is pushed fully back to engage the DIN 41612 connector.
- Card Configuration: Set the internal jumpers or DIP switches to match the sensor type (e.g., Bridge or Current Loop). Configure the alarm levels (A1, A2, A3) and the latching/non-latching relay behavior.
- Calibration: Use the “Zero” and “Span” controls on the front panel while applying the appropriate calibration gas to the field sensor. Monitor the LCD to ensure the reading stabilizes at the correct value.
- Operational Check: Verify the “Inhibit” function before maintenance to prevent accidental alarm triggering. Ensure the “Active” LED is green under normal operation.
Q&A – Frequently Asked Questions
Q: What is the difference between the 05701-A-0326 and the 05701-A-0330? A: Both are System 57 cards, but the 0326 is a specific hardware revision often tailored for high-sensitivity bridge inputs. Always check your rack backplane compatibility before swapping versions.
Q: Can the relays be used to shut down equipment? A: Yes. The onboard relays are rated for 5A at 250V AC/30V DC, allowing them to directly trigger shutdown valves or auxiliary ventilation systems.
Q: Does this card support digital communication? A: While it is primarily an analog-based control card, it can be integrated into a larger digital network via a System 57 Modbus interface module.
Product News: Enhancing Industrial Safety Standards
Honeywell continues to support the Honeywell 05701-A-0326 as a reliable choice for facilities that prefer modular, rack-based safety architectures. Recent technical bulletins emphasize the longevity of the System 57 platform, noting that many modules installed in the early 2000s are still in active service due to their robust design. To ensure continued compliance with modern safety directives, Honeywell has updated the manufacturing standards for these cards to include lead-free components and improved electromagnetic shielding, ensuring they remain a top-tier choice for hazardous area monitoring.
