Description
Product Introduction
The Foxboro P0916AC (RoHS designation RH916AC) is a specialized Control Processor (CP) baseplate designed for the Foxboro 200 Series subsystem and EcoStruxure DCS platforms. Unlike standard 8-slot FBM baseplates, the P0916AC is custom-engineered to host primary and secondary Field Control Processors, such as the FCP270 or FCP280.
Featuring an integrated high-speed tracking backplane, the P0916AC enables continuous, sub-millisecond lockstep synchronization between paired controllers. It routes redundant 24V DC operating power, time-strobe signals, and dual 2 Mbps HDLC fieldbus links directly to downstream Fieldbus Modules (FBMs) while interfacing back to the main control network (The Mesh).
Key Technical Specifications
| Parameter | Value |
| Manufacturer | Foxboro (Invensys / Schneider Electric) |
| Part Number | P0916AC (RoHS Equivalent: RH916AC) |
| Series | Foxboro 200 Series Subsystem / Control Architecture |
| Supported Controllers | Foxboro FCP270 (P0926CP) / FCP280 (P0926TC) / ZCP270 |
| Slot Capacity | 2 Dedicated Controller Positions (Fault-Tolerant Pair or Single) |
| Backplane Interconnect | High-speed dedicated inter-processor tracking bus |
| Power Distribution | Dual Redundant 24V DC input connectors via baseplate bus |
| Fieldbus Interface | Redundant HDLC Fieldbus ports (Bus A & Bus B) to FBM baseplates |
| Operating Temp Range | 0°C to +60°C (+32°F to +140°F) |
Application Scenarios & The “Trench” Experience
The Trench Story
It is 01:10 AM during a control node retrofit at a gas processing plant. Upgrading a standalone controller to a fault-tolerant redundant FCP270 pair required swapping out an older mounting assembly for a dedicated P0916AC baseplate. Once mounted on the cabinet DIN rail and wired to dual power feeds, the engineering team slotted both FCP270 cards into the P0916AC. The baseplate’s onboard hardware tracking bus immediately established lockstep communication between the primary and backup processors—enabling seamless, fail-safe database synchronization before morning startup.
Target Application Scenarios
- High-Availability Control Nodes: Primary baseplate foundation for redundant FCP270/FCP280 controller pairs in mission-critical process environments.
- Cabinet Control Backbone: Serves as the central communication hub linking control networks (The Mesh) to downstream 200 Series FBM fieldbus chains.
- DCS Infrastructure Upgrades: Essential hardware baseplate when migrating legacy I/A Series nodes to modern 200 Series processor architectures.
P0916AC
P0916AC
P0916AC
Transparency SOP: Quality Assurance & Testing
Every baseplate undergoes a strict 5-stage workbench validation process prior to dispatch:
- Inbound Visual & Mechanical Inspection: High-magnification check of controller slot pin arrays, backplane traces, latching guide rails, and heavy-duty connector shrouds for alignment or mechanical stress.
- Backplane Electrical Isolation & Short Checks: Multi-point resistance checks across 24V DC power buses, ground planes, and tracking lines to rule out internal PCB shorts.
- Live Redundant Controller Lockstep Test: Mounted on a test stand populated with a pair of FCP270/FCP280 controllers. We verify immediate partner recognition, tracking status LEDs, and database mirroring over the baseplate tracking channels.
- Redundant Network & Fieldbus Pass-Through: High packet loads are transmitted through the baseplate fieldbus ports to connected FBM baseplate chains, verifying zero data drops when cycling Bus A and Bus B lines.
- Anti-Static ESD Packaging: Cleared baseplates receive solvent contact cleaning, thorough drying, and are sealed in heavy anti-static ESD shielding bags prior to custom foam packaging.
The Veteran’s Tech Trap Guide
- ⚠️ Do Not Confuse CP Baseplates () with FBM Baseplates (P0914XB / P0926KE)!
The is specifically keyed and wired for Control Processors (like the ). Standard I/O modules (FBMs) cannot be installed in this baseplate.
- ❗ Verify Power & Fieldbus Cable Latching:
Ensure primary and secondary 24V DC power connections and fieldbus extension cables attached to the top of the are firmly screwed down to prevent loose connections from causing false power or bus fault alarms.
- ⚠️ Confirm Module Seating before Powering Up:
When inserting or FCP280 cards into the , press firmly until side latches click fully into place. Partial connector engagement can prevent inter-processor tracking bus initialization.
- ❗ Check RoHS Part Number Equivalents ( vs. RH916AC):
is the standard Foxboro hardware part number, while
RH916ACis Schneider Electric’s RoHS-compliant equivalent. Both share identical dimensions, mounting hole patterns, and electrical performance.
Frequently Asked Questions (FAQ)
Q: What is the primary function of the Foxboro baseplate?
A: The is a 2-slot baseplate designed specifically to house Foxboro Field Control Processors (such as the or FCP280) and provide the backplane connectivity for power, tracking synchronization, and fieldbus communications.
Q: What is the difference between part numbers and RH916AC?
A: “” is the standard Foxboro hardware part number, and “RH916AC” is Schneider Electric’s RoHS-compliant (lead-free) equivalent. They are 100% functionally and mechanically interchangeable.
Q: Can a single controller be run on a baseplate?
A: Yes, the can host a single Control Processor in slot 1, or a fault-tolerant redundant pair using both slots.
Q: What warranty covers these pre-tested baseplate assemblies?
A: Every / baseplate sold includes a full 12-Month Functional Warranty. If the unit experiences hardware failure under normal operating parameters within 365 days, we provide an immediate unit replacement or full credit.
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