Product Details
The Foxboro P0918AH, also cataloged as the P0918AH Analog Input Module, operates as a dedicated hardware component for high-density analog signal digitization and real-time process monitoring within Foxboro DCS platforms. It processes 16 analog input channels across current and voltage ranges, converting field signals into 16-bit digital resolution for system controller execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | P0918AH |
| Brand | Foxboro |
| Origin | USA |
| Weight | 0.45 kg |
| Dimensions | 172 mm x 107 mm x 61 mm |
| Operating Temp | -40 deg C to +70 deg C |
| Power Consumption | 3.5 W |
| Input Channels | 16 analog inputs |
| Input Signal Types | Current: 4-20 mA; Voltage: 0-10 V, -10 V to +10 V |
| Resolution | 16 bits |
| Accuracy | +-0.1% of full scale |
| Isolation Voltage | 500 VDC between channels |
| Power Supply | 24 VDC |
| Update Rate | 250 ms response time |
Channel-to-Channel Isolation and Loop Protocol Integration
The Foxboro P0918AH incorporates 500 VDC galvanic isolation barriers between individual channels to maintain signal integrity and eliminate ground loops across field wiring. This channel-to-channel isolation safeguards 16-bit analog-to-digital conversions against common-mode electrical noise and high-voltage transients while processing 4-20 mA HART loop protocol transmitters and multi-range voltage instruments.
Frequently Asked Questions
Q: What isolation rating is provided between individual channels on the P0918AH module?
A: The P0918AH provides 500 VDC galvanic isolation between input channels to protect logic circuits against potential ground fault currents.
Q: What is the sampling update rate across all 16 channels of the P0918AH module?
A: The module executes a maximum response time of 250 ms across its input channels for real-time control loop updating.
Field Installation Guidelines
Mount the P0918AH module vertically into its designated baseplate card slot, verifying that upper and lower mechanical retention clips engage fully with the chassis rails. Ensure 24 VDC system supply power is de-energized prior to seating or removing the module.
Route all analog field input wiring through dedicated low-voltage wiring ductwork, physically separated from high-voltage AC cables and motor drives. Connect all signal cable drain shields to the main cabinet single-point ground bar. For conduit penetrations entering the cabinet enclosure, ensure all threaded NPT fittings achieve a minimum of 5 full threads of engagement to maintain physical strain relief and grounding integrity.
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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