Overview
Configured for cabinet cooling and alarm contact monitoring in Honeywell industrial control equipment, the Honeywell 51303940-250 (51303940-250 Cabinet Fan Assembly With Alarm) provides direct airflow generation and alarm switching functions. The assembly combines a cabinet fan with an electrical alarm contact for monitoring fan-related operating conditions. The supplied specifications identify the unit as a Honeywell cabinet-mounted component with defined electrical switching and environmental operating parameters.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 51303940-250 |
| Product Type | Cabinet Fan Assemblies |
| Product Parameters | Cabinet Fan With Alarm |
| Brand | Honeywell |
| Manufacturer | Honeywell |
| Origin | USA |
| Tariff Code | 8537101190 |
| Weight | 1.88 kg |
| Dimensions | 39 x 14.1 x 5.5 cm |
| Operating Temp | -40 to +70 deg C |
| Humidity | 5-95% RH, non-condensing |
| Voltage | 24 VDC, 18-32 VDC input range |
| Current | 0.8 A maximum load |
| Power Consumption | 19.2 W nominal |
| Cabinet Fan / Alarm Rating | 0.5 A |
| Additional Electrical Rating | 170-254 VDC, 47-63 Hz, as supplied |
| Switching Voltage | 200 VDC peak |
| Contact Rating | 10 W maximum |
| Switching Load | AC resistive |
DCS Instrumentation Interface Characteristics
The 51303940-250 is a cabinet-level electromechanical assembly rather than a process signal interface module. Therefore, the supplied technical data does not identify direct support for a 4-20 mA HART loop protocol, FOUNDATION Fieldbus, Profibus PA, or channel-to-channel isolation.
Instead, the alarm function provides a discrete electrical contact interface for connection to an appropriate monitoring circuit. Consequently, the connected control system must evaluate the alarm contact according to its configured discrete input characteristics. Installation wiring should also separate the alarm circuit from power conductors where required by the cabinet wiring design.
Frequently Asked Questions
Q: What is the primary function of the Honeywell 51303940-250?
A: The assembly provides cabinet airflow together with an alarm contact function for connection to an external monitoring circuit.
Q: What is the maximum specified power consumption?
A: The supplied data specifies 19.2 W nominal power consumption and a maximum load current of 0.8 A.
Q: Can the alarm contact switch high-power loads directly?
A: No. The supplied contact rating is 10 W maximum, with a specified switching voltage of 200 VDC peak. The connected load must remain within the stated contact limits.
Field Installation Guidelines
- Mount the Honeywell 51303940-250 securely within the designated cabinet location and maintain unobstructed airflow around the fan assembly.
- Verify the available supply voltage against the specified 24 VDC operating range before energizing the unit.
- Keep fan power wiring and alarm contact wiring clearly identified during installation and maintenance.
- Route alarm wiring separately from high-current power conductors when cabinet wiring practices require electrical noise reduction.
- Confirm the alarm contact load does not exceed the specified switching voltage or 10 W maximum contact rating.
- Inspect ventilation openings and surrounding cabinet components to prevent mechanical blockage of airflow.
- De-energize the associated equipment before replacing or rewiring the assembly unless the system documentation explicitly permits energized maintenance.
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