Product Details
The Foxboro P0918HU, also cataloged as the P0918HU Industrial Power Module, operates as a dedicated hardware component for AC-to-DC conversion and internal bus power distribution within Foxboro control platforms. Configured to accept an input voltage of 90 to 264 VAC, the module delivers a regulated 24 VDC output (±5%) at up to 100 W maximum capacity with greater than 90% full-load efficiency. It maintains continuous power conversion across an operating temperature range of -20 to +60 deg C (-4 to +140 deg F).
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | P0918HU |
| Brand | Foxboro |
| Origin | USA |
| Weight | 0.9 lbs (0.41 kg) |
| Dimensions | Standard Foxboro Module Form Factor |
| Operating Temp | -20 to +60 deg C (-4 to +140 deg F) |
| Power Consumption | Input-dependent (> 90% efficiency at full load) |
| Input Voltage | 90 to 264 VAC |
| Output Voltage | 24 VDC ± 5% |
| Power Output | 100 W maximum |
| Mounting Type | Baseplate Mount |
DCS Process Control and Channel Isolation
The Foxboro P0918HU industrial power module incorporates high-frequency transformer isolation to decouple primary AC utility supplies from the downstream 24 VDC distribution bus. Designed to supply operational power for 4-20 mA HART loop protocol field devices and system I/O modules, the unit suppresses high-frequency ripple and common-mode line transients. Integrated channel-to-channel isolation prevents ground potential loops between field instrument grounds and backplane control circuits, ensuring signal stability under electrical noise conditions.
Frequently Asked Questions
Q: What happens to the 24 VDC output during an downstream over-load or short-circuit event?
A: The P0918HU contains active foldback over-current protection that clamps current draw to protect connected backplane logic modules from electrical damage.
Q: Can the P0918HU module be hot-swapped during active DCS operation?
A: Hot-swapping is permitted only when installed in dual-redundant baseplate configurations where an adjacent parallel power module maintains the 24 VDC rail load.
Field Installation Guidelines
- Confirm the primary AC power feed is locked out and de-energized prior to connecting input terminal wiring.
- Align the module card edges with the baseplate slots and push firmly until the mechanical locking latches engage fully.
- Route incoming AC power conductors in dedicated wireways separate from low-voltage DC signal and field loop cables.
- Attach the protective earth (PE) grounding lead directly to the main cabinet ground busbar to ensure proper EMI filtering performance.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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