HONEYWELL 05701-A-0285 I/O Module

Description

HONEYWELL 05701-A-0285 I/O Module

Product Dimensions：

The Honeywell 05701-A-0285 is a high-performance Single-Channel Control Card from the System 57 series. This series is an industry standard for modular gas detection and monitoring, designed to provide flexible and scalable safety solutions.

Product Detailed Description

The 05701-A-0285 is an analog input module that monitors a single gas detector. It provides the interface between the field-mounted gas sensor and the control system. The card is designed to be installed in a System 57 rack and features a dedicated front-panel display for real-time monitoring of gas concentrations and alarm status.

Unlike the 4-channel variants, the 05701-A-0285 offers a more granular approach, allowing for dedicated, high-visibility monitoring of a single critical point.

Technical Parameters

Product Advantages

• High Visibility: The combination of a multi-segment bar graph and a digital LCD allows operators to quickly assess the gas concentration and the “rate of rise” at a specific location.
• Flexible Input Support: The card is compatible with a wide range of Honeywell gas detectors, supporting both standard 4–20 mA transmitters and catalytic bead (pellistor) sensors.
• Dedicated Protection: Because it is a single-channel card, a failure on this specific module will not impact the monitoring of other gas sensors in the same rack, enhancing system availability.
• Comprehensive Alarming: Provides three levels of alarms and a fault indicator, which can be used to trigger external sirens, beacons, or shutdown sequences.

Important Considerations & Precautions

• Rack Configuration: Ensure the System 57 backplane is correctly jumpered for a single-channel card. The 05701-A-0285 requires specific pin-outs that differ from multi-channel cards.
• Sensor Matching: You must configure the internal jumpers or use the configuration software to match the card to the specific sensor type (e.g., Flammable, Toxic, or Oxygen).
• Power Budget: When populating a rack, calculate the total power consumption of all 05701-A-0285 cards plus the current draw of the field sensors to ensure the rack power supply is not overloaded.
• Inhibit Mode: During maintenance or calibration, ensure the card is placed in “Inhibit” mode to prevent false alarms or accidental triggering of fire suppression systems.

Product Applications

The 05701-A-0285 is utilized in safety-critical gas monitoring architectures:

• Refineries and Petrochemical: Monitoring for flammable gas (LEL) around storage tanks or process units.
• Confined Spaces: Continuous Oxygen and Toxic gas monitoring in tunnels, pits, or vaults.
• Laboratories: Detecting specialty gas leaks in research environments.
• Boiler Rooms: Monitoring for Carbon Monoxide (CO) or Methane (CH_4) leaks.

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