Product Details:

FOXBORO 33CAJD is a high-performance rack mount control module, also known as 33C-AJ-D, an isolated signal interface card built for process automation. This control module is designed as a core signal acquisition component compatible with FOXBORO I/A series DCS systems. It adopts compact PCB assembly with reinforced metal shielding frame, which protects internal precision electronic circuits from vibration, dust and electromagnetic interference inside industrial control cabinets. The module supports multi-channel isolated signal input, and each channel provides independent galvanic isolation to eliminate cross-channel interference and ensure stable and accurate data acquisition from field instruments.

This FOXBORO 33CAJD signal interface card receives analog measurement signals from field transmitters for temperature, pressure, flow and liquid level detection. It converts raw analog signals into digital data and transmits the processed data to the DCS host controller for monitoring, recording and closed-loop control calculation. The module supports built-in channel fault diagnosis function, which can detect open circuit, short circuit and abnormal signal status. Once a fault occurs, it sends alarm information to the control system, helping maintenance engineers quickly locate the faulty channel and shorten plant downtime. The module supports hot swap function, technicians can replace the card without shutting down the whole DCS system, which is critical for continuous production plants.

Specifications:

Model: 33CAJD (33C-AJ-D)

Brand: FOXBORO

Product Type: Isolated multi-channel control / signal interface module

Power supply: 24 VDC

Input signal: 0~20mA analog signal

Output signal: 4~20mA analog signal

Measurement accuracy: ±0.1% full scale

Response time: 5 ms

Channel design: Galvanic isolation between each channel

Diagnosis: Channel fault detection and alarm

Ambient working temperature: 0℃ ~ +60℃

Relative humidity: 5% ~ 95%, non-condensing

Installation: Rack mounting in DCS cabinet

System compatibility: FOXBORO I/A Series DCS

Certification: CE, UL, ATEX

This control module has excellent EMC anti-interference capability, suitable for continuous long-time operation in heavy industrial control rooms. Its modular rack plug-in structure brings simple installation and convenient maintenance. This signal interface card is widely used in oil & gas, chemical refining, power generation, pulp and paper industries. It can be used for new DCS automation project construction, and also serves as spare parts replacement for aging data acquisition modules on legacy I/A series DCS systems. Every FOXBORO 33CAJD module passes strict factory inspection and calibration before shipment to guarantee reliable data acquisition performance for process automation.