05701-A-0330 | Honeywell High Integrity Relay Card

Product Overview

The Honeywell 05701-A-0330 is a High Integrity Relay Card featuring Double SPCO (Single Pole Changeover) relay configuration for the System 57 gas detection platform. It provides eight fully configurable relays for critical alarm and safety applications, with relay state monitoring to ensure correct operation. Important: This card can only be used with MKII Control Cards.

Key Specifications

• Model Number: 05701-A-0330
• Series: Honeywell System 57
• Product Type: High Integrity Relay Card — Double SPCO
• Compatibility: MKII Control Cards ONLY
• Relay Configuration: 8 relays total — 7 fully configurable + 1 dedicated Fault relay
• Relay Contact Rating: 5A at 110V/250V AC (non-inductive); 5A at 32V DC (non-inductive)
• Relay Operation: Selectable latching/non-latching, energised/de-energised; delayed switch-on/switch-off available
• Power Consumption: 1.7W
• Dimensions: 112 mm × 25 mm × 102 mm (H × W × D)
• Weight: 255g
• Field Terminals: 2.5 mm² (14 AWG)

Core Features

• Relay states monitored by control card to ensure correct operation
• Fault relay de-energises on malfunction — must always be monitored
• Seven fully configurable relays for flexible alarm assignment
• Delayed switch-on/switch-off capability for alarm relays
• High integrity design for safety-critical applications
• Galvanic isolation between channels and system logic

Applications

• Safety instrumented systems (SIS) requiring relay state verification
• Master alarm functions or mixed master/individual alarm configurations
• Gas alarm annunciation with fault monitoring
• Emergency shutdown (ESD) systems
• Fire and gas detection relay outputs

FAQ

Q: Is the 05701-A-0330 compatible with all System 57 control cards?
A: No. The High Integrity Relay Card can only be used with MKII Control Cards. Verify your control card revision before ordering.

Q: What happens if a relay malfunctions?
A: The fault relay de-energises, and the control card detects the relay state mismatch. The fault relay must always be monitored to ensure correct system operation.

Installation Guide

1. Verify control card is MKII revision before installing 05701-A-0330.
2. Power down the System 57 rack before installation.
3. Insert the relay card into the designated sub-rack slot.
4. Connect field wiring to the terminal block (max 2.5 mm² / 14 AWG).
5. Configure relay functions using the Engineering Interface Software.
6. Test all relay outputs and fault monitoring before commissioning.

Selection Tips

• Choose 05701-A-0330 for high-integrity applications requiring relay state monitoring.
• Mandatory: Verify MKII control card compatibility before ordering.
• For standard triple SPCO without monitoring, consider 05701-A-0328.
• For triple DPCO with 4-20mA output, consider 05701-A-0329.