05701-A-0328 | Honeywell Triple SPCO Relay Card

Product Overview

The Honeywell 05701-A-0328 is a Triple SPCO (Single Pole Changeover) Relay Card for the System 57 gas detection platform. It provides relay outputs for three alarm levels (A1, A2, A3) plus Fault and Inhibit status, enabling comprehensive alarm management for gas detection channels.

Key Specifications

• Model Number: 05701-A-0328
• Series: Honeywell System 57
• Product Type: Relay Card — Triple SPCO
• Relay Configuration: A1, A2, A3, Fault & Inhibit (Single Pole Changeover Relays)
• 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
• Power Consumption: 1.0W
• Dimensions: 112 mm × 25 mm × 102 mm (H × W × D)
• Weight: 205g
• Field Terminals: 2.5 mm² (14 AWG)

Core Features

• Five independent SPCO relays for comprehensive alarm output coverage
• Dedicated relays for A1, A2, A3 alarm levels plus Fault and Inhibit
• Configurable relay operation modes
• Direct interface between control cards and field-connected gas sensors
• Compact plug-in design for System 57 sub-racks

Applications

• Gas detection alarm annunciation
• Ventilation control activation
• Emergency shutdown signaling
• Process safety interlock systems
• Fire and gas monitoring relay outputs

FAQ

Q: How many relays does the 05701-A-0328 provide?
A: The card provides five SPCO relays: one each for A1, A2, A3 alarm levels, plus one for Fault and one for Inhibit status.

Q: What is the difference between 05701-A-0327 and 05701-A-0328?
A: The 05701-A-0327 is a Double SPCO relay card (A1, A2 & Fault), while the 05701-A-0328 is a Triple SPCO relay card adding A3 and Inhibit relays.

Installation Guide

1. Power down the System 57 rack completely.
2. Insert the relay card into the appropriate sub-rack slot.
3. Connect field wiring to the terminal block.
4. Configure relay operation modes via the engineering card.
5. Perform functional testing of all relay outputs.

Selection Tips

• Select 05701-A-0328 when three alarm levels (A1/A2/A3) are required.
• For applications needing only two alarm levels, 05701-A-0327 may be sufficient.
• For redundant relay outputs per alarm level, consider 05701-A-0330 (High Integrity).