DCS I/O & Controller Modules

Showing 1393 - 1416 of 1793 products

$823.50

Only 8 units left

Foxboro P0916NG I/A Series Fieldbus Module (P0916NG). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro P0924PH Foxboro

$880.00

Only 2 units left

Foxboro P0924PH I/A Series Fieldbus Module (P0924PH). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro B0132MT Foxboro

$0.00

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Foxboro Analog/Control Circuit Board (B0132MT). Replacement PCB assembly for Foxboro instrumentation or DCS equipment. Factory-calibrated board for direct replacement in Foxboro transmitters, controllers, Spec 200 systems, or I/A Series modules. For maintaining and repairing installed Foxboro process control equipment.

Foxboro P0916AH Foxboro

$383.46

Only 4 units left

Foxboro I/A Series DCS Module (P0916AH). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0924HA Foxboro

$0.00

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Foxboro P0924HA I/A Series Fieldbus Module (P0924HA). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro P0922VT Foxboro

$1,686.35

Only 8 units left

Foxboro I/A Series DCS Module (P0922VT). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0911VR Foxboro

$0.00

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Foxboro I/A Series DCS Module (P0911VR). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0940NN Foxboro

$0.00

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Foxboro FCP270 Field Control Processor (P0940NN). control processor for the I/A Series DCS. Features up to 50 control loops, IEC 61131-3 programming (structured text, function block), and Foundation Fieldbus H1 support. The heart of I/A Series process control for critical refining, chemical, and power generation applications.

Foxboro B0142FT Foxboro

$0.00

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Foxboro Analog/Control Circuit Board (B0142FT). Replacement PCB assembly for Foxboro instrumentation or DCS equipment. Factory-calibrated board for direct replacement in Foxboro transmitters, controllers, Spec 200 systems, or I/A Series modules. For maintaining and repairing installed Foxboro process control equipment.

Foxboro P0903QZ Foxboro

$1,199.44

Only 2 units left

Foxboro I/A Series Workstation Component (P0903QZ). Replacement component for I/A Series operator or engineering workstations. May include graphics controller, processor board, keyboard, or display module. For maintaining workstation functionality.

Foxboro P0917GZ Foxboro

$2,013.45

Only 2 units left

Foxboro P0917GZ I/A Series Fieldbus Module (P0917GZ). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro P0926GL Foxboro

$0.00

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Foxboro I/A Series DCS Module (P0926GL). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0400YT Foxboro

$713.49

Only 4 units left

Foxboro P0400YT I/A Series Fieldbus Module (P0400YT). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro N0301FA Foxboro

$0.00

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Foxboro Specialized/Interface Circuit Board (N0301FA). Replacement PCB assembly for Foxboro instrumentation or DCS equipment. Factory-calibrated board for direct replacement in Foxboro transmitters, controllers, Spec 200 systems, or I/A Series modules. For maintaining and repairing installed Foxboro process control equipment.

Foxboro P0916UY Foxboro

$0.00

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Foxboro I/A Series Termination Assembly (P0916UY). Field wiring termination block for I/A Series FBM modules. Provides screw-terminal or compression connections for field instrument wiring. Features channel labeling, test points, and surge protection. Mates with specific FBM modules in the I/A Series baseplate.

Foxboro P0400UP Foxboro

$6,090.00

Only 6 units left

Foxboro CP Control Processor (P0400UP). I/A Series DCS control processor module. Features IEC 61131-3 compliant programming, PID loop execution, sequential logic, and batch control. Mounts in the I/A Series control station. For process control applications in continuous and batch operations.

Foxboro P0917FA Foxboro

$0.00

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Foxboro I/A Series Workstation Component (P0917FA). Replacement component for I/A Series operator or engineering workstations. May include graphics controller, processor board, keyboard, or display module. For maintaining workstation functionality.

Foxboro P0923LN Foxboro

$292.50

Only 2 units left

Foxboro I/A Series DCS Module (P0923LN). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0918NB Foxboro

$0.00

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Foxboro I/A Series DCS Module (P0918NB). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0914XG Foxboro

$416.00

Only 2 units left

Foxboro P0914XG I/A Series Fieldbus Module (P0914XG). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro P0912YB Foxboro

$1,369.84

Only 4 units left

Foxboro I/A Series DCS Module (P0912YB). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0917TH Foxboro

$0.00

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Foxboro P0917TH I/A Series Fieldbus Module (P0917TH). I/O module for the Foxboro I/A Series DCS platform. Features channel isolation, hot-swap capability, and high-reliability design for continuous process control. For process automation in refining, chemical, and power generation.

Foxboro P0916AE Foxboro

$315.00

Only 6 units left

Foxboro I/A Series DCS Module (P0916AE). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

Foxboro P0971WV Foxboro

$764.93

Only 9 units left

Foxboro I/A Series DCS Module (P0971WV). Component module for the Foxboro I/A Series Distributed Control System. Part of the comprehensive DCS platform used in refining, chemical, pharmaceutical, and power generation facilities. Features high-reliability design for continuous 24/7 operation.

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DCS I/O & controller modules are the field-interface and processing hardware at the core of distributed control system architectures, handling signal acquisition, output control, and process data management across industrial operations. PLC Direct supplies DCS I/O and controller modules as an independent supplier, stocking surplus sealed, refurbished, and used hardware for maintenance and replacement in installed DCS environments.

Where Are DCS I/O & Controller Modules Used in Industrial Environments?

DCS I/O and controller modules are used wherever continuous or batch process control requires distributed, rack-based field I/O and centralized processing hardware. These components form the backbone of process control architectures in facilities where reliability and signal integrity across hundreds or thousands of field points are operational requirements.

Facilities and operations that depend on DCS I/O & controller modules include:

Oil and gas refineries and upstream production facilities running continuous process control.
Chemical and petrochemical plants managing multi-loop process automation.
Power generation facilities coordinating turbine, boiler, and balance-of-plant control.
Water and wastewater treatment plants with a distributed pump station and process I/O.
Pharmaceutical and life sciences manufacturing environments with batch process control requirements.

Replacement I/O and controller modules are among the most frequently sourced DCS hardware, particularly in aging installations where original components are no longer in active production.

Which Brands of DCS I/O & Controller Modules Does PLC Direct Stock?

PLC Direct stocks DCS I/O and controller modules across the major process automation platforms used in installed industrial systems worldwide.

Emerson DeltaV CHARM I/O system: KJ2101-series digital output CHARMs, KJ2201-series digital input CHARMs, KJ3204-series analog output CHARMs, and KJ3102/KJ3222/KJ3201 analog input and valve position modules, along with VerticalPlus carrier assemblies and power hardware supporting the DeltaV CHARM architecture.
Schneider Electric Modicon Quantum 140-series I/O: Discrete input, discrete output, and analog input/output modules for the Modicon Quantum platform, including rack backplanes and remote I/O drop adaptors in the 140-series range.
ABB S500 I/O modules: DA501 and DA502 digital/analog combination modules, CI541-DP and CI592-CS31 interface modules for PROFIBUS and CS31 networks, and TU515/TU516 terminal units supporting AC500-based distributed I/O installations.
ABB System 800xA: Distributed control system hardware supporting process automation, safety, and asset management in large-scale process industries.

PLC Direct carries DCS I/O and controller modules as surplus sealed, refurbished, and used hardware, giving maintenance teams options across condition grades and budget requirements.

What Should You Know Before Ordering DCS I/O & Controller Modules?

Hardware condition options: PLC Direct supplies DCS I/O and controller modules in surplus sealed, refurbished, and used condition. Surplus sealed units are factory-sealed stock; refurbished modules have been tested and restored to operational condition; used hardware provides a cost-effective option for facilities managing lifecycle replacements on a tight budget.

Compatibility and part identification: DCS I/O modules are platform-specific and in most cases are not interchangeable across systems from different manufacturers or even across generations within the same platform. Confirm the platform name, module series, and full part number from cabinet documentation or system drawings before ordering. For CHARM-based DeltaV systems, verify the signal type configuration (AI, AO, DI, DO, RTD, thermocouple) required at the channel level, as each CHARM module is configured for a specific signal class.

Warranty: All DCS I/O and controller module hardware purchased from PLC Direct carries a standard 1-year PLC Direct warranty covering defects and functionality, applicable to surplus sealed, refurbished, and used products.

PLC Direct supplies DCS I/O and controller module hardware for replacement and maintenance purposes and does not provide system design, programming, or integration services.

Frequently Asked Questions

DCS I/O modules are the hardware interface between a distributed control system and the field instruments, sensors, and actuators connected to it. They convert field signals: analog voltage and current, discrete on/off states, thermocouple and RTD readings, into digital data that the DCS controller can process, and translate controller output commands back into field signals. Each module handles a defined signal type and channel count, and modules are slotted into racks or carrier assemblies that connect to the controller network.

DCS I/O modules are platform-specific and are not interchangeable between systems from different manufacturers. Within a single platform, compatibility depends on the module series, firmware version, and carrier or rack configuration. For example, Emerson DeltaV CHARM modules are designed specifically for VerticalPlus carrier assemblies and are not compatible with earlier DeltaV S-series I/O infrastructure. Always verify the part number against your system documentation before ordering a replacement.

PLC Direct stocks DCS I/O and controller modules for Emerson DeltaV CHARM systems, Schneider Electric Modicon Quantum 140-series platforms, and ABB S500 I/O and System 800xA installations. Contact PLC Direct with your part number to check current availability.

PLC Direct supplies DCS I/O and controller modules as surplus sealed, refurbished, and used hardware. Surplus sealed units are factory-sealed and have not been previously installed. Refurbished modules have been inspected and tested to confirm operational functionality. Used hardware is sourced from decommissioned installations and is suited for facilities where budget is the primary constraint.

The most reliable method is to cross-reference the part number printed on the module label or recorded in the system's cabinet documentation with the platform's hardware manual. For Emerson DeltaV CHARM systems, the KJ-prefix part number identifies both the module type and signal class. For Modicon Quantum, the 140-series part number encodes the module type and channel configuration. If the label is damaged or the part number is unavailable, the system's I/O list or hardware configuration file is the next reference point. Contact PLC Direct with the part number or as much system detail as available to assist with identification.