Honeywell 05704-A-0121 Quad Relay Interface Card

Description

The Honeywell 05704-A-0121 Quad Relay Interface Card supports reliable relay output control in demanding industrial automation systems. The card works as an essential link between Honeywell control logic and external field devices that require clear, decisive switching. Engineers value this module because it maintains stable relay performance across long operating cycles. Moreover, it delivers predictable control behavior that helps plants maintain operational consistency. The compact form factor fits smoothly into Honeywell System 57 racks, allowing efficient system integration and straightforward maintenance.

Key Features

• Provides four independent SPCO relay outputs for flexible switching

• Supports latching and non-latching modes for configurable alarm behavior

• Allows energized or de-energized relay operation to suit system design

• Handles industrial-grade loads with strong contact ratings

• Ensures stable switching performance in harsh process environments

• Supports clean wiring through 2.5 mm (14 AWG) field terminals

Technical Specifications

Model Number: 05704-A-0121
Product Type: Quad Relay Interface Card
Relay Outputs: 4 x SPCO relays
Relay Operating Modes: Selectable latching / non-latching; energized / de-energized
Relay Contact Ratings:

• 5A at 110/250 VAC (non-inductive)

• 5A at 32 VDC (non-inductive)
  Power Consumption: 1.7 W maximum, 1 W typical
  Field Terminal Size: 2.5 mm (14 AWG)
  Dimensions: 132 mm (H) × 25 mm (W) × 119 mm (D)
  Weight: 230 g
  Mounting Method: Rack-mounted within Honeywell control chassis
  System Compatibility: Honeywell System 57 and comparable platforms
  Application Role: Alarm output, shutdown control, device actuation, external circuit interfacing
  

Typical Applications

The Honeywell 05704-A-0121 supports alarm annunciation, process interlocking, and equipment actuation in complex control systems. Moreover, it integrates smoothly into fire and gas panels, shutdown architectures, and general-purpose automation racks. Many plants deploy this module to standardize relay output behavior across diverse operational units.

Support & Maintenance

Engineers can replace or upgrade the card without system rewiring thanks to its clear terminal layout. Therefore, maintenance teams reduce downtime during scheduled service windows. The rugged construction extends service life and helps ensure system reliability in industrial facilities.

FAQ

Q: Which Honeywell systems support the 05704-A-0121 relay card?
A: The card works primarily with Honeywell System 57 and similar distributed control platforms.

Q: Does the module support latching relay operation?
A: Yes, it offers selectable latching and non-latching modes to match alarm requirements.

Q: What loads can the relays handle?
A: Each relay supports up to 5A at 110/250 VAC or 32 VDC for non-inductive loads.

Q: Can the card operate relays in energized or de-energized states?
A: Yes, engineers can configure each relay for energized or de-energized operation.

Q: Is the card suitable for shutdown and safety signaling?
A: Yes, its stable SPCO relays support many plant shutdown and alarm circuits.