Overview
Configured for alarm relay switching in Honeywell System 57 / 5701 Series gas detection controllers, the Honeywell 05701-A-0327 (05701-A-0327 Double SPCO Relay Card) provides direct physical/electrical execution for A1, A2, and Fault single pole changeover relay outputs.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 05701-A-0327 |
| Brand | Honeywell |
| Origin | Not specified |
| Product Type | Double SPCO Relay Card |
| System Compatibility | Honeywell System 57 / 5701 Series |
| Relay Outputs | A1 Alarm, A2 Alarm, Fault SPCO relay contacts |
| Relay Contact Rating | 5 A at 250 VAC / 32 VDC (non-inductive load) |
| Relay Configuration | Selectable latching/non-latching, normally energized/de-energized |
| Power Consumption | 0.8 W |
| Weight | Approx. 155 g |
| Dimensions | Not specified |
| Operating Temp | -5 deg C to +55 deg C |
| Storage Temp | -25 deg C to +55 deg C |
| Operating Humidity | 20% to 99% RH, non-condensing |
| Terminal Connection | Up to 2.5 mm2 cable |
| Compliance | EN50270 EMC requirements |
Channel Isolation and Process Alarm Interface
The Honeywell System 57 relay architecture uses dedicated output hardware to transfer gas detection alarm states into external electrical circuits. The 05701-A-0327 relay card provides physical switching paths for A1, A2, and Fault conditions, with configurable relay energization states to match alarm philosophy requirements.
The module operates as an output expansion component installed behind the corresponding channel control card. Relay contacts provide interface capability for external annunciators, shutdown circuits, and plant safety interlocks.
Frequently Asked Questions
Q: Is the 05701-A-0327 a standalone controller module?
A: No. The 05701-A-0327 is a relay interface card designed for installation behind System 57 channel control cards. It provides relay output functions only.
Q: What relay functions are available on this card?
A: The card manages A1 alarm, A2 alarm, and Fault single pole changeover relay outputs with selectable relay operating modes.
Q: Can the relay outputs be used directly for external shutdown circuits?
A: The relay contacts can interface with external control circuits within the specified contact rating. External circuit design must comply with the application safety requirements.
Field Installation Guidelines
- Install the relay card in the designated rear position of the Honeywell System 57 rack assembly.
- Verify the matching channel control card and rack configuration before insertion.
- Confirm terminal wiring polarity and relay contact assignment according to the system wiring documentation.
- Route relay output wiring separately from high-current power conductors to reduce electrical interference.
- Apply appropriate cable shielding and grounding practices where external alarm wiring is exposed to industrial noise sources.
- Inspect relay contact loading to ensure connected circuits remain within the specified switching capacity.
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