05704-A-0123 Honeywell System 57 Fire Relay Interface Assembly 16-Relay Expansion Card

05704-A-0123 Fire Relay Interface Assembly

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General Information

Model number	05704-A-0123
Country of origin	USA
Condition	Brand New
Dimension	2.3x11.8x13cm
Weight	0.22kg
Lead time Warranty	in stock
MOQ	1 pcs

Comprehensive Feature

The 05704-A-0123 is a Honeywell System 57 high-density Fire Relay Interface Assembly featuring full 16-relay contact scalability. Fully compatible with the System 57 backplane, this unit works seamlessly with 5704F Four Channel Fire Control Cards to deliver flexible individual or master alarm configurations and stable industrial fire detection monitoring.

Specific Application

High-Density Fire Alarm Routing: Expanding the default 6-relay capacity of a standard Hex Relay Card up to 16 relays to manage massive auxiliary signaling networks (e.g., triggering fire doors, visual strobes, and suppression systems simultaneously).
Zoned and Voted Matrix Logic: Providing distinct, voltage-free contact outputs to drive complex master, zoned, or voted hardware-level voting systems in critical control environments.
Dual-Slot Space Optimization: Tailored for front or rear-access Euro-rack cabinets where high-capacity control loops and extensive relay logic must be consolidated into a centralized 19-inch sub-rack.

Ordering Information

Part Number	Item Description	Slot Width Allocation	Main Function / Application
05704-A-0123	5704F Fire Relay Interface Assembly	2 Slots	Provides field connection inputs for 4 loops and delivers a scaled total of 16 voltage-free alarm/fault relay outputs.
05704-A-0146	5704F Four Channel Fire Control Card	1 Slot	Microprocessor-based control card managing sensor drive, signal processing, and alarm limits for up to 4 fire loops.
05704-A-0131	Hex Relay Interface Card	1 Slot	Standard field wiring interface providing 4 detector loop inputs and 6 single-pole voltage-free relay outputs.
05704-A-0148	5704FS Fire Status Panel	1 Slot	Racks up as a common user interface per rack, offering visual/audible status and push-button maintenance controls.
05701-A-0361	System 57 Engineering Card	1 Slot	Fits into the right-hand slot to manage backplane communications, time/探针 mapping, clock reference, and PC interface.
05701-A-0325	System 57 DC Input Card	1 Slot	Centralized terminal for routing user-supplied nominal 24V DC power and managing Modbus/printing option modules.

System Compatibility

· Control Cards: Form-fitted for dedicated use with the Honeywell 5704F Four Channel Fire Control Card (05704-A-0146).

· Racking Units: Compatible with standard System 57 full 19" (17 card slots) and half 19" (9 card slots) sub-racks across both 3U (rear field wiring) and 6U (front field wiring) structural layouts.

Alternative Model & Differences

· Alternative Model: Hex Relay Interface Card (Part Number 05704-A-0131).

· Key Differences:

o Relay Quantity: The 05704-A-0123 assembly provides 16 relays total, whereas the standard 05704-A-0131 provides only 6 relays.

o Physical Slot Footprint: The 05704-A-0123 consists of an Expansion Relay Card factory-fitted to the base Hex Relay Interface Card, occupying two interface card slots in the rack. The 05704-A-0131 occupies only one slot.

o Panel Real Estate: Because the 05704-A-0123 consumes two slots at the interface section, a matching blank front panel (or a Fire Status Panel) must be physically installed in the front control rack adjacent to the corresponding control card.

Installation & Troubleshooting FAQ

Q1: Why must I install a blank panel or Fire Status Panel on the front rack after installing the 05704-A-0123?

A: The 05704-A-0123 Fire Relay Interface Assembly uses a combined two-card stack (Hex Relay Card + Expansion Relay Card) which physically dictates a two-slot width footprint at the rear/interface layer of the rack. To prevent open gaps on the front operating face and ensure electromagnetic interference (RFI) protection, the adjacent empty space on the front must be covered using a 1-inch blanking panel or utilized for the Fire Status Panel.

Q2: What are the relay contact specifications for the 12 additional relays on the expansion side of this assembly?

A: Of the 12 additional expansion relays provided by the assembly, eight (8) are single-pole change-over relays (providing Normally Closed, Normally Open, and Common connections) and four (4) are single-pole single-throw relays (providing Normally Open and Common connections). All relay contact descriptions in the technical documentation explicitly refer to the non-powered ("de-energized") shelf state of the system.

Q3: My 5704F control card is not triggering the corresponding expansion relays on the 05704-A-0123. How do I trace the fault?

A: First, check that the 26-way D-type connector (SK1) and the interconnected ribbon cable mappings between the control card section and the interface section are perfectly seated. Second, verify the system software configuration. Because these relays can be assigned dynamically as master, zoned, or individual channel alarms, you must consult the precise configuration printout generated via the Engineering Card RS232 link to verify which inputs are mapped to trigger those specific relay paths.

Contact information

Please don’t hesitate to contact us if you have any questions or concerns before or after your purchase. We are committed to your 100% satisfaction.

Sales Manager:Stella

Email:sales6@apterpower.com

Whatsapp:+86 18159889985

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