Product Overview

The Foxboro P0926JMA is a high-precision Clamp Base Module engineered for the I/A Series Distributed Control System (DCS). This essential hardware component serves as a specialized mounting and interface platform for a wide array of Foxboro field instruments, including controllers, relays, and transmitters. Designed to maintain signal integrity while providing a rigid mechanical foundation, the P0926JMA facilitates the seamless integration of field-level data into the broader DCS architecture.

Constructed with a rugged stainless steel exterior, this module is purpose-built for high-reliability applications where space is at a premium but performance cannot be compromised. It provides the necessary electrical routing and physical security required for instruments operating in volatile or high-vibration industrial settings.

Technical Specifications

• Manufacturer: Foxboro (Schneider Electric / Invensys)

• Model Number: P0926JMA

• Module Type: Clamp Base / Baseplate Module

• Series: I/A Series

• Operating Voltage: 24V DC

• Current Consumption: 100 mA

• Signal Output: 4 to 20 mA DC

• Accuracy: ±0.25% of Full Scale

• Repeatability: ±0.05%

• Response Time: 1 Second

• Enclosure Material: Industrial Stainless Steel

• Hazardous Area Rating: Class 1, Division 2 (Groups A, B, C, D)

• Operating Temperature: -40°C to +65°C (-40°F to +150°F)

• Dimensions: 4.5 x 11.5 x 11.5 cm

• Weight: 0.3 kg (Approx. 0.66 lbs)

Core Technical Characteristics

• Precision Measurement Handling: The P0926JMA is calibrated for high-fidelity signal processing, offering a precision rating of ±0.25%. This makes it an ideal interface for critical control loops in chemical processing and power generation where accuracy is non-negotiable.

• Corrosion-Resistant Architecture: Unlike standard baseplates, the P0926JMA features a stainless steel enclosure. This provides superior protection against caustic chemicals, salt spray, and moisture, ensuring a significantly longer service life in harsh environments.

• Low-Latency Data Transmission: With a 1-second response time, the module supports real-time process monitoring. It efficiently translates instrument data into a standard 4-20 mA output, allowing for deterministic control by the upstream processor.

• Hazardous Location Safety: This unit is certified for use in Class 1, Division 2 environments. It meets stringent safety requirements for areas where flammable gases or vapors may be present, providing peace of mind in oil and gas applications.

• Energy-Efficient Operation: Consuming only 100 mA at 24V DC, the module minimizes the thermal load within the control cabinet, reducing the need for specialized cooling and lowering overall energy costs.

• Versatile Device Support: The clamp-base design is engineered for universal compatibility across the Foxboro instrument line, allowing for rapid swapping of transmitters and controllers without the need for extensive rewiring.

Primary Applications

The Foxboro P0926JMA Clamp Base Module is widely deployed in:

• Petrochemical Refineries: Secure mounting for transmitters in explosive and corrosive zones.

• Power Generation Facilities: Interfacing relay and control signals in high-vibration environments.

• Oil & Gas Midstream: Providing a stable platform for pressure and flow monitoring at pipeline stations.

• Chemical Batch Processing: Ensuring repeatable accuracy for precision measurement instruments.