Description
Product Overview
The Honeywell 05701-A-0301 is a high-reliability, single-channel gas control card designed for the Honeywell Analytics System 57 control framework. This module acts as the centralized interface for a single toxic gas, flammable gas, or oxygen detector, processing analog signals from the field transmitter and translating them into real-time concentration readouts. Engineered for critical safety instrumented systems (SIS), the 05701-A-0301 features an integrated 4-digit LCD display, adjustable alarm thresholds, and fully programmable relay outputs to initiate emergency ventilation, sound alarms, or trigger plant shutdown systems upon detecting hazardous atmospheric changes.
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Technical Specifications
- Manufacturer: Honeywell Analytics / Zellweger
- Series: System 57 Control System
- Model Keyword: HONEYWELL 05701-A-0301 Control Card
- Dimensions: 17.2 cm x 3.1 cm x 11.4 cm
- Weight: 0.28 kg (0.62 lbs)
- Country of Origin: United Kingdom (UK)
- Signal Input: 3-wire or 2-wire 4-20 mA current loops (Sink or Source)
- Display Type: 4-character backlit LCD with integrated engineering unit icons
- Relay Outputs: Three fully programmable alarm relays (A1, A2, A3) and one dedicated fault relay
- Power Supply: 21 to 32 VDC nominal input range
- Power Consumption: 3.5 Watts maximum
HONEYWELL 05701-A-0301
HONEYWELL 05701-A-0301
HONEYWELL 05701-A-0301
Application Fields
The 05701-A-0301 card is vital for continuous gas monitoring and safety interlock automation across various harsh environments:
- Petrochemical and Refining: Continuous monitoring of combustible hydrocarbon leaks and toxic H_2S concentrations in processing units.
- Wastewater Treatment: Detecting methane accumulations and oxygen depletion in confined wet wells and storage tanks.
- Chemical Manufacturing: Tracking volatile organic compounds (VOCs) and hazardous process gas releases near storage vessels.
- Semiconductor Fabrication: Monitoring specialized toxic gases used in wafer etching and deposition cleanrooms.
Product Installation and Usage Instructions
- Preparation and Safety: Power down the System 57 rack enclosure prior to installation. Ensure compliance with local hazardous area electrical standards and wear a grounded ESD wrist strap to protect the electronic circuits.
- Card Insertion: Slide the 05701-A-0301 control card into its designated slot within the 19-inch sub-rack chassis until the rear multi-pin DIN connector seats firmly into the backplane.
- Mechanical Locking: Fasten the two captive thumbscrews located on the front faceplate to ensure the module is locked securely in place and properly grounded to the chassis frame.
- Field Wiring: Connect the field gas detector cables to the corresponding terminals on the rear passive interface assembly block, ensuring correct polarity for 4-20 mA signal transmission.
- Calibration and Configuration: Apply power to the system. Use the front panel push-buttons (or System 57 software) to select the target gas type, set the span gas value, adjust the low/high alarm setpoints, and execute a zero calibration check.
Frequently Asked Questions (Q&A)
Q: Can the 05701-A-0301 be used with both catalytic bead and electrochemical gas detectors?
A: Yes. The card is designed to accept a standard industrial 4-20 mA signal, allowing it to interface seamlessly with various transmitter types, including catalytic, electrochemical, and infrared gas sensors.
Q: What do the different indicators on the card faceplate signify?
A: Beside the main LCD concentration display, the card features discrete LEDs: green indicates normal operation (Power/Run), amber signifies a system fault, and individual red LEDs light up when Alarm 1, Alarm 2, or Alarm 3 thresholds are crossed.
Q: Is it necessary to recalibrate the control card when replacing a field sensor?
A: Yes, it is highly recommended. To ensure accurate gas concentration readings, a complete loop calibration (zero and span adjustment) should be performed at the control card level whenever a new field sensor is connected.
Q: Are the internal relay contacts on this card latching or non-latching?
A: The configuration is fully customizable. Through the control card setup menu, you can configure the alarm relays to be latching (requiring manual reset after an alarm event clears) or non-latching (automatic reset).
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