The Honeywell 05704-A-0123 Fire Relay Interface Assembly is an expansion relay module designed for the Honeywell System 5704 Fire and Gas Detection Controller. Installed together with the Hex Relay Interface Card, it expands the controller by providing twelve additional relay outputs, including eight Single Pole Changeover (SPCO) relays and four Single Pole Single Throw (SPST) relays. These relays can be individually configured for fire alarm, fault, inhibit, master alarm, or channel-specific outputs, allowing flexible integration with fire alarm panels, emergency shutdown (ESD) systems, PLCs, DCS controllers, and audible or visual warning devices.

Contents

• 1. Product Overview
• 2. Main Features
• 3. Typical Applications
• 4. Installation Preparation
• 5. Module Installation
• 6. Relay Wiring Connections
• 7. Relay Configuration
• 8. Commissioning Procedure
• 9. Functional Verification
• 10. Preventive Maintenance
• 11. Practical Installation Case
• 12. Frequently Asked Questions

Product Overview

The Honeywell 05704-A-0123 Expansion Relay Card connects directly to the Hex Relay Interface Card to increase the number of available relay outputs within a System 5704 controller. Together, the two modules occupy two adjacent rack slots and provide configurable relay outputs for fire alarms, faults, inhibit signals, and master alarm functions.

Main Features

• Provides 12 additional relay outputs
• Eight SPCO relay outputs
• Four SPST relay outputs
• Supports fire alarm outputs
• Supports fault relay outputs
• Supports inhibit relay outputs
• Configurable master and individual channel alarms
• Compatible with Honeywell System 5704 controllers

Typical Applications

• Industrial fire detection systems
• Gas detection systems
• Oil and gas production facilities
• Petrochemical plants
• Refineries
• Chemical processing plants
• Power generation facilities
• Emergency shutdown systems

Installation Preparation

• Verify the module part number.
• Confirm compatibility with the System 5704 controller.
• Disconnect controller power.
• Wear ESD protection equipment.
• Inspect module connectors.
• Prepare field relay wiring.
• Review project wiring diagrams.

Module Installation

1. Turn off the System 5704 controller.
2. Locate the Hex Relay Interface Card.
3. Install the 05704-A-0123 in the adjacent rack slot.
4. Connect the expansion card to the Hex Relay Interface Card.
5. Secure both modules.
6. Complete relay wiring.
7. Restore controller power.

Relay Wiring Connections

• Connect fire alarm relay outputs.
• Connect fault relay outputs.
• Connect inhibit relay outputs.
• Connect master alarm outputs.
• Verify external control wiring.
• Inspect grounding and cable shielding.

Relay Configuration

• Assign relay functions.
• Select fire or fault operation.
• Configure inhibit functions.
• Assign master alarm outputs.
• Select latching or non-latching operation.
• Verify relay assignments.

Commissioning Procedure

INSTALL HEX RELAY CARD
INSTALL EXPANSION RELAY CARD
CONNECT INTERCARD LINK
COMPLETE FIELD WIRING
CONFIGURE RELAY FUNCTIONS
TEST FIRE ALARMS
VERIFY FAULT OUTPUTS
CONFIRM NORMAL OPERATION

Functional Verification

• Verify all twelve relay outputs.
• Test fire alarm activation.
• Verify fault relay operation.
• Test inhibit functions.
• Confirm master alarm operation.
• Verify controller communication.

Preventive Maintenance

• Inspect relay terminals regularly.
• Clean connector contacts.
• Verify relay switching.
• Inspect field wiring.
• Check module mounting.
• Perform scheduled functional testing.

Practical Installation Case

A petrochemical processing facility expanded its fire detection system by installing a Honeywell 05704-A-0123 Fire Relay Interface Assembly alongside an existing Hex Relay Interface Card. After configuring dedicated relay outputs for fire alarms, emergency shutdown, ventilation control, and remote annunciators, engineers completed commissioning tests. All relay outputs responded correctly during simulated fire alarm conditions, allowing seamless integration with the plant’s safety systems.

Frequently Asked Questions

What is the Honeywell 05704-A-0123 used for?

It expands the relay capacity of the Honeywell System 5704 controller by adding twelve configurable relay outputs for fire alarms, faults, inhibit functions, and master alarm signals.

How many additional relays does the module provide?

The Expansion Relay Card provides twelve additional relays consisting of eight SPCO relays and four SPST relays.

Can the module operate independently?

No. The 05704-A-0123 is designed to operate together with the Hex Relay Interface Card and requires both modules to be installed in adjacent rack slots.

Summary

The Honeywell 05704-A-0123 Fire Relay Interface Assembly provides twelve additional configurable relay outputs for the Honeywell System 5704 Fire and Gas Detection Controller. Proper installation, relay configuration, field wiring, and commissioning ensure dependable alarm distribution and reliable integration with industrial fire and gas safety systems.