Foxboro P0918EU PLC I/O Module | I/A Series Control

Product Description

The Foxboro P0918EU is a compact control and I/O processing module developed for integration within the Foxboro I/A Series Distributed Control System. Combining controller functionality with onboard input/output handling, it enables localized control execution and direct field device interfacing in a single hardware unit.

Equipped with an embedded microprocessor, the module executes control strategies with deterministic timing, making it suitable for real-time industrial automation tasks. It supports both discrete and analog signal processing, allowing flexible deployment across applications that require monitoring and control of multiple device types.

Its robust electrical isolation and wide environmental tolerance ensure dependable operation in electrically harsh and temperature-variable environments.

Technical Specifications

General Information

• Model: P0918EU

• Manufacturer: Foxboro 

• Product Type: PLC / Mixed I/O Module

• System Platform: Foxboro I/A Series DCS

• Function: Integrated control processing with onboard I/O

Processor & Memory

• CPU: Intel 80C186 embedded processor

• RAM: 256 KB

• ROM: 512 KB

• Execution Capability: Supports real-time control logic and data handling

I/O Configuration

• Digital I/O: 32 points (configurable as input/output depending on system setup)

• Analog I/O: 16 channels

• Supported Analog Signals:

• Voltage: 0–5 V, ±5 V

• Current: 4–20 mA

• Resolution: 14-bit A/D conversion

• Measurement Accuracy: ±0.1% of full scale

Isolation & Protection

• Isolation Rating: 2 kV (field-to-system)

• Noise Immunity: Designed for high EMI/RFI environments

• Protection: Electrical isolation reduces risk of ground loops and transient faults

Electrical Characteristics

• Supply Voltage: 24 VDC

• Power Consumption: Approx. 4 W

• Internal Regulation: Stabilized power distribution for logic and I/O circuits

Performance

• Control Execution: Deterministic scan cycle for stable automation tasks

• Response Behavior: Suitable for medium-speed control loops and discrete logic

• Programming Support:

• Ladder Logic

• Function Block Diagram (FBD)

Environmental Conditions

• Operating Temperature: –40°C to +70°C

• Storage Temperature: –40°C to +85°C

• Relative Humidity: 0% to 95% non-condensing

Mechanical Specifications

• Dimensions: 180 mm × 110 mm × 60 mm

• Weight: 0.5 kg

• Mounting Method: DIN rail or system panel installation

• Construction: Industrial-grade housing for long-term reliability

Key Features

• Integrated PLC functionality with combined analog and digital I/O

• Intel 80C186 processor for stable real-time control execution

• 2 kV isolation enhances operational safety and signal integrity

• Flexible signal support for voltage and current inputs

• Wide temperature tolerance for deployment in harsh environments

Applications

• Distributed control in oil & gas production facilities

• Process automation in chemical and petrochemical plants

• Power generation auxiliary control systems

• Equipment control for pumps, motors, and valves

• Hybrid control scenarios requiring both logic and analog processing

FAQ

Q: Is the P0918EU a standalone PLC or part of a DCS system?
A: It is designed to operate within the Foxboro I/A Series DCS, providing localized control and I/O functionality rather than acting as a standalone PLC.

Q: What types of signals can it process?
A: The module supports both digital signals and analog inputs such as 4–20 mA and ±5 V.

Q: Which programming methods are supported?
A: It supports common industrial programming formats including Ladder Logic and Function Block Diagrams.