05701-A-0326 Dual SPCO Relay Interface (Industrial-Grade Fire Alarm Control)

Designed for mission-critical fire detection networks, the Honeywell 05701-A-0326 relay interface card delivers dependable voltage-free switching for alarm signaling and fault notification across System 57 installations. This dual-channel module bridges fire control panels with building management platforms, remote monitoring stations, and emergency response infrastructure through isolated changeover contacts.

Facility managers and system integrators rely on this relay card to coordinate fire safety protocols with HVAC shutdown sequences, access control releases, and centralized alarm annunciation. Its galvanically isolated design prevents ground loops and electrical interference, ensuring signal integrity in electrically noisy industrial environments.

With EN54 certification and UL/FM approval, the 05701-A-0326 meets stringent international fire safety standards while providing the flexibility to interface with diverse third-party equipment through industry-standard dry contact outputs.

Core Features & Benefits

✓ Dual Independent Relay Channels
Two SPCO (changeover) relays enable simultaneous control of separate alarm circuits or redundant signaling paths, reducing single-point failure risks in critical applications.

✓ Voltage-Free Contact Design
Dry contact outputs eliminate compatibility concerns with external equipment voltage levels, supporting both AC and DC loads up to 2A switching capacity without polarity constraints.

✓ 1500V Galvanic Isolation
High-voltage isolation protects System 57 control circuitry from transient surges and ground potential differences when interfacing with remote equipment across extended cable runs.

✓ Wide Environmental Operating Range
Rated for 0°C to 50°C operation with 95% humidity tolerance, this module maintains reliable performance in mechanical rooms, electrical closets, and semi-outdoor enclosures.

✓ Flexible Mounting Options
DIN rail and panel mount configurations accelerate installation in standard fire alarm cabinets and custom control enclosures without specialized hardware.

✓ Compliance-Ready Certification
UL, FM, CE, and EN54 approvals streamline authority having jurisdiction (AHJ) approval processes for commercial and industrial fire protection projects.

Application Scenarios

→ Central Station Monitoring Integration
Transmit fire alarm and supervisory signals to UL-listed central monitoring stations via digital alarm communicators (DACs) using voltage-free contact inputs. Eliminates voltage level matching concerns across multi-manufacturer systems.

→ Emergency HVAC Control Sequencing
Trigger smoke damper actuators and air handling unit emergency shutdowns during fire events. Relay contacts interface directly with damper control modules and motor starters for code-compliant smoke control.

→ Mass Notification System Coordination
Activate building-wide public address systems and visual strobes through relay-triggered amplifier inputs. Supports NFPA 72 intelligibility requirements for voice evacuation systems.

→ Access Control Fail-Safe Release
Command electromagnetic door locks and electric strikes to release during fire alarm activation, ensuring unobstructed egress paths per life safety codes. Relay contacts provide fail-safe operation independent of access control power.

→ Industrial Process Safety Interlocks
Interface fire detection systems with programmable logic controllers (PLCs) to initiate emergency shutdown sequences for hazardous material handling equipment, chemical processing lines, and combustible dust collection systems.

Technical Parameters & Selection Guide

Selection Criteria: Choose the 05701-A-0326 when your application requires isolated relay outputs for interfacing System 57 fire panels with external monitoring or control equipment. For applications demanding higher contact ratings (5A+), consider supplementary power relays. When integrating with Modbus/BACnet networks, pair with protocol gateway modules for digital communication.

Extended Functions

IoT Integration Capability: Combine with Ethernet-enabled fire alarm communicators to transmit relay status to cloud-based facility management platforms. Supports remote diagnostics and alarm verification workflows for distributed enterprise installations.

Customization Options: Factory configuration services available for pre-wired terminal blocks, custom cable assemblies, and application-specific relay timing adjustments. Consult technical support for project-specific requirements exceeding 50 units.

Advanced Diagnostics: When paired with System 57 panels featuring enhanced diagnostics, relay coil supervision and contact status monitoring provide early warning of impending relay failures before critical system impact.

Delivery & Service Assurance

Lead Time: Standard stock items ship within 2-3 business days. Custom configurations require 10-15 business days for factory preparation and quality verification.

Warranty Coverage: Comprehensive 12-month manufacturer warranty covers material defects and workmanship failures. Extended warranty programs available for installations exceeding 100 modules.

Technical Support: Pre-sales application engineering assistance and post-installation troubleshooting support included. Access to wiring diagrams, configuration guides, and firmware update notifications via online customer portal.

Documentation Package: Each unit includes installation manual, terminal wiring diagrams, compliance certificates, and dimensional drawings. CAD files and BIM objects available for download.

Frequently Asked Questions

Q: What wire gauge is recommended for relay output connections?
A: Use minimum 18 AWG (0.75mm²) stranded copper wire for relay contacts. For cable runs exceeding 100 meters, upgrade to 16 AWG (1.0mm²) to minimize voltage drop and ensure reliable switching of inductive loads like solenoid valves.

Q: Can this relay card switch inductive loads such as motor contactors?
A: Yes, but derate contact capacity by 50% for inductive loads. Install RC snubber networks (0.1µF + 100Ω) across relay contacts when switching coils exceeding 10W to suppress arc erosion and extend contact life.

Q: How do I verify relay operation during commissioning?
A: Initiate test mode from the System 57 panel to energize relay coils. Measure continuity between common (C) and normally-open (NO) terminals during activation. Contact resistance should remain below 0.3Ω throughout the switching cycle.

Q: Is the module compatible with System 57 panels manufactured before 2010?
A: The 05701-A-0326 maintains backward compatibility with all System 57 panel generations. Verify panel firmware supports relay card addressing if deploying more than four relay modules on a single loop.

Q: What maintenance schedule is recommended for fire alarm relay cards?
A: Conduct annual functional testing per NFPA 72 Chapter 14 requirements. Inspect terminal connections for tightness and corrosion. Replace module if contact bounce exceeds 5ms or if switching failures occur during testing.

Q: Can I monitor relay status remotely through building automation systems?
A: Direct relay status feedback requires auxiliary contact monitoring modules. For BACnet/Modbus integration, deploy protocol gateways that poll System 57 panel status and map relay states to network objects.

Ready to Integrate Fire Safety with Building Systems?

Contact our application engineering team for project-specific wiring diagrams, compatibility verification with your existing System 57 installation, and volume pricing for multi-site deployments. Request a technical datasheet or schedule a consultation to discuss your fire alarm integration requirements.

© 2026 NINERMAS COMPANY LIMITED. All rights reserved.
Original Source: https://ninermas.com
Contact: sale@ninermas.com | +0086 187 5021 5667