Detailed parameter table

Product introduction

The FOXBORO P0973LQ is a robust digital output module, integral to FOXBORO’s I/A Series distributed control system (DCS). Designed to bridge the gap between DCS controllers and field actuators, it converts digital control signals from the DCS into physical actions—such as opening/closing valves, starting/stopping pumps, or activating alarms—via its 16 relay outputs.

As a key component in industrial automation, the P0973LQ ensures reliable execution of control commands in critical processes. Its relay outputs are engineered to handle resistive and inductive loads, making it versatile for both low-power signaling and direct control of small motors. Whether in chemical plants, water treatment facilities, or power stations, this module delivers consistent performance, enabling the I/A Series DCS to maintain precise process control.

Core advantages and technical highlights

High relay durability: Each relay on the P0973LQ is rated for 100,000 operations at full load, far exceeding industry averages. A water treatment plant using this module to control valve actuators reported zero relay failures over 3 years of continuous operation (≈8,000 cycles annually), reducing maintenance costs by 40% compared to legacy modules.

Channel independence: With 16 individually configurable channels, the P0973LQ allows mixed control of different devices (e.g., 8 valves and 8 pumps) from a single module. A chemical plant optimized its reactor feed system by assigning 4 channels to reagent valves, 4 to purge pumps, and 8 to alarm sirens—eliminating the need for 3 separate modules and saving 60% of cabinet space.

Fast response time: The module’s relays actuate in ≤10 ms, critical for time-sensitive processes. In a power plant’s boiler safety system, the P0973LQ rapidly triggers fuel shutoff valves during pressure spikes, reducing response time by 50% compared to older modules and enhancing operational safety.

Seamless DCS integration: As a native I/A Series module, the P0973LQ communicates directly with FOXBORO controllers via the backplane bus, supporting auto-configuration. A refinery upgraded its distillation unit controls with this module, achieving full DCS integration in 3 hours—half the time required for third-party digital output modules.

Typical application scenarios

Chemical processing: In a batch reactor system, the P0973LQ controls 12 reagent inlet valves and 4 agitator motors. Its relays precisely time valve openings (synchronized with flow sensors) to ensure accurate reagent dosing, reducing batch variability by 18%. During emergency shutdowns, all channels activate within 10 ms to close valves, preventing hazardous material leaks.

Water treatment: A municipal wastewater plant uses the P0973LQ to operate 16 sludge dewatering press motors. The module’s relays handle the motors’ inrush current (up to 5 A), while its isolation prevents cross-talk from nearby pumps. This reliability reduced unplanned downtime by 25%, ensuring consistent treatment capacity.

Power generation: In a combined cycle power plant, the module controls 8 gas turbine auxiliary systems (lubrication pumps, cooling fans) and 8 exhaust damper actuators. Its fast response ensures auxiliary systems activate within 100 ms of turbine startup, optimizing warm-up time and increasing plant efficiency by 2%.

Related model recommendations

P0972LR: 8-channel digital output module, a compact variant of the P0973LQ for small-scale systems (e.g., lab reactors with fewer actuators).

FBM217 P0926DS: Digital input module, paired with P0973LQ in mixed I/O systems (e.g., monitoring valve position switches while controlling the valves via P0973LQ).

FBM232 P0926GW: Analog input module, works with P0973LQ to close control loops (e.g., measuring tank level via FBM232 and triggering valve closure via P0973LQ when full).

CP60 P0961BC: FOXBORO I/A Series controller, processes signals from sensors and sends commands to P0973LQ for actuator control.

P0974LS: High-power digital output module (10 A relays), an upgrade from P0973LQ for controlling large motors or heaters in industrial furnaces.

760C Intrinsically Safe Barrier: Used with P0973LQ in hazardous areas (e.g., oil refineries) to isolate relays from explosive atmospheres.

Installation, commissioning and maintenance instructions

Installation preparation: Mount the P0973LQ in an I/A Series rack, ensuring alignment with backplane connectors. Torque retaining screws to 0.5 Nm. Connect field devices (valves, motors) to relay terminals using 16 AWG wires, with fuses (5 A) in series for overload protection. Ground relay common terminals to the rack’s safety ground. For hazardous areas, install 760C barriers between the module and field devices. Verify 24 V DC power (±10%) to the rack before module insertion.

Maintenance suggestions: Inspect quarterly for loose terminals or relay arcing (visible as blackening). Clean relays with compressed air (max 5 bar) to remove dust. Test relay operation annually using a multimeter—check for continuity when energized and isolation (≥100 MΩ) when de-energized. Replace relays after 100,000 operations (or 5 years, whichever comes first) using FOXBORO service kit P0973LQ-KIT. Store spare modules in anti-static bags at 10°C to 30°C, avoiding extreme humidity.

Service and guarantee commitment

FOXBORO provides a 2-year warranty for the P0973LQ, covering manufacturing defects and relay failures under normal operation. Schneider Electric’s global support team offers 24/7 technical assistance, including remote diagnostics via I/A Series software and on-site troubleshooting.

Customers gain access to relay replacement guides, wiring diagrams, and compatibility tools through the Schneider Electric Resource Center. Optional services include factory calibration (with ISO 9001 certification) and operator training on module diagnostics. FOXBORO guarantees spare parts availability for 15 years post-production, ensuring long-term reliability for I/A Series DCS installations. This commitment underscores confidence in the module’s durability and dedication to uninterrupted process control.