Foxboro FBM211 P0916JT Fieldbus Module

Independent channel isolation and overvoltage protection (e.g., transient suppression diodes) prevent on-site electromagnetic interference (EMI) and surge impacts;

Configurable hardware filtering effectively eliminates interference sources such as switching noise and power fluctuations.

Supports online modification of configuration settings such as input range, filtering time, and linearization parameters without shutdown;

Hot-swapping allows disturbance-free module replacement, reducing system downtime and fitting continuous production scenarios.

In redundant configuration, the backup module automatically switches in when the primary module fails, ensuring uninterrupted data acquisition;

Supports Fault-Safe fallback, allowing configuration of default output values (e.g., maintaining the last valid value or a preset safe value) in case of channel failures.

Analog signals output by field sensors (e.g., thermocouples, pressure transmitters) are connected to the module via terminals, processed by signal conditioning circuits (e.g., amplification, filtering), and converted into standard levels suitable for ADC sampling.

For RTD/thermocouple signals, the module integrates an excitation power supply and cold-junction compensation circuit to ensure temperature measurement accuracy (e.g., automatic cold-junction temperature compensation for thermocouples).

Conditioned analog signals are converted to digital quantities (binary encoding) via a 16-bit ADC, and range mapping is performed based on input types (e.g., 4-20mA corresponds to 0-100% engineering units).

Digital signals are stored in the module buffer after verification (e.g., CRC check), waiting to be transmitted to the control system.

Optocoupler isolation technology isolates input signals from internal circuits to prevent field failures from affecting the DCS system;

Encoded digital quantities are transmitted to the Control Processor (CP) via redundant fieldbus (A/B dual paths), with the communication protocol supporting real-time data interaction and command reception (e.g., range modification commands).

LED indicators (e.g., power, communication, channel fault lights) on the module front display operating status in real time for on-site troubleshooting;

Built-in self-diagnostic circuits continuously monitor power supply, ADC accuracy, communication links, etc., sending alarm messages to the system and recording fault codes (e.g., channel open circuit, out-of-range) when anomalies are detected.