Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 05701-A-0327 |
| Manufacturer | Honeywell Analytics |
| Product Series | System 57 / 5701 |
| Product Type | Double SPCO Relay Card |
| Relay Configuration | A1, A2, and Fault Single Pole Changeover Relays |
| Relay Quantity | 2 alarm relays + fault relay function |
| Contact Rating | 5A at 250VAC / 32VDC (non-inductive) |
| Relay Operation | Selectable latching/non-latching |
| Relay State | Normally energized or normally de-energized selectable |
| Power Consumption | Approx. 0.8W for double SPCO card |
| Terminal Size | Up to 2.5 mm² (14 AWG) cable |
| Operating Temperature | -5°C to +55°C |
| Storage Temperature | -25°C to +55°C |
| Humidity Range | 20–99% RH non-condensing |
| Mounting | Honeywell System 57 rack installation |
| Compliance | EN50270 related EMC requirements |
Product Introduction
Honeywell 05701-A-0327 Product Introduction
Honeywell 05701-A-0327 is a System 57 Double SPCO Relay Card designed to provide alarm and fault relay interfaces in Honeywell 5701 gas detection control systems. The module allows detected conditions such as gas alarms or system faults to activate external devices including annunciators, shutdown circuits, and plant alarm systems.
The value of Honeywell 05701-A-0327 is maintaining existing fixed gas detection installations where relay logic is integrated into plant safety systems. Before replacement, confirm relay configuration, normally energized/de-energized settings, and connected field circuits because incorrect relay behavior can affect alarm response.
05701-A-0327
Application Scenarios & Field Pitfalls (The Engineer’s Perspective)
Engineering Pain Point
A gas detection panel reports an alarm condition, but the connected ventilation fan or shutdown circuit does not respond. The detector may be operating correctly, while the problem is located in the relay interface layer.
Relay cards are simple devices electrically, but they are often connected to critical safety actions. A wrong contact state or incorrect relay configuration can create unexpected plant behavior.
Typical Applications
- Oil & Gas Facilities – Gas alarm output interfaces for compressor buildings, process areas, and hydrocarbon storage zones.
- Chemical Plants – Alarm relay switching for toxic gas and combustible gas monitoring systems.
- Power Generation – Fuel handling areas, battery rooms, and enclosed equipment monitoring.
- Industrial Manufacturing – Fixed gas detection panels controlling alarms, ventilation systems, and emergency shutdown signals.
Technical Pitfalls to Avoid
- Confirm Relay Contact Logic Before Replacement
Check whether the existing system uses normally energized or normally de-energized relay operation. A replacement with incorrect logic can reverse the expected alarm action. - Inspect External Wiring First
Relay failures are sometimes caused by overloaded contacts, incorrect field wiring, or downstream equipment faults rather than the card itself. - Verify System 57 Compatibility
The 05701-A-0327 is designed for Honeywell System 57 architecture. Confirm the installed rack, field interface card, and control card combination before installation.
Related Products
- Honeywell 05701-A-0325
DC Input Card for System 57 applications. Used for signal input processing before alarm relay activation. - Honeywell 05701-A-0326
Field Interface Card used as part of the System 57 signal connection structure. - Honeywell 05701-A-0301
Single Channel Control Card for 4-20mA gas detector inputs. - Honeywell 05701-A-0302
Single Channel Control Card designed for catalytic sensor applications. - Honeywell 05701-A-0351
Single Channel Control Card for 5701 systems with different monitoring functions. - Honeywell 05701-A-0328
Triple SPCO Relay Card variant providing additional relay outputs compared with the 05701-A-0327. - Honeywell 05701-A-0361
Engineering Card used for System 57 configuration and maintenance functions. - Honeywell System 57 Gas Detection Controller
Complete fixed gas monitoring platform using control cards, relay cards, and field interface modules.
