Foxboro FBM232 P0926GW Ethernet Communication Module

High-precision Signal Processing: AI channels feature 16-bit resolution and linearity ≤±0.05% FS; AO channels have 14-bit resolution, meeting requirements for precise measurement and control.

AI Input: Supports configurable signals including 4-20mA, 0-20mA, 0-5V, 0-10V, ±5V, ±10V, compatible with devices like pressure transmitters and temperature sensors.

AO Output: Supports signals such as 4-20mA and 0-10V, directly driving actuators like control valves and frequency converters. Output load capacity: ≤500Ω for 4-20mA, ≥10kΩ for 0-10V.

AI Channels: Receive external sensor signals (e.g., 4-20mA from pressure transmitters), filter and amplify via signal conditioning circuits, convert to digital quantities through 16-bit ADC, and transmit to the internal processor via optoelectric isolators.

Signal Processing: The processor linearizes and corrects digital signals, filters out noise, stores them in status registers, and supports engineering unit conversion (e.g., mapping between temperature in °C and current in mA).

AO Channels: Receive control commands (digital quantities) from the host computer (e.g., DCS), convert to analog signals via 14-bit DAC, and output to actuators through relay drive circuits.

Protection Mechanism: Output terminals are equipped with overcurrent and overvoltage protection circuits to prevent module damage from abnormal loads.

Communicate with the control system via Modbus RTU protocol, uploading AI data and receiving AO commands in real time.

LED indicators dynamically display channel status (e.g., flashing when AI exceeds limits, steady on when AO output is valid).

Power off and wear an anti-static wristband to avoid static damage to components.

Ensure the installation environment is far from strong electromagnetic sources (e.g., frequency converters, transformers), with suitable temperature and humidity.

Insert into the corresponding slot of the FBM backplane, pressing until the slot locks.

If using a DIN rail, fix the backplane with an adapter to ensure firm installation.

Current signal (4-20mA): Two-wire transmitters directly connect to AI terminals (+ for signal, - for COM); three-wire/four-wire transmitters require external power supply.

Voltage signal (0-10V): Connect positive and negative poles to corresponding terminals, with the common end to COM.

Current output: Load is connected in series between AO terminal and COM (e.g., control valve coil), with load resistance ≤500Ω.

Voltage output: Load is connected in parallel between AO terminal and COM, with load impedance ≥10kΩ.

Inductive loads require parallel freewheeling diodes (DC) or varistors (AC) to prevent back EMF interference.

Confirm no loose terminals and correct wiring.

After powering on, check the PWR light (green steady on), and AI/AO channel lights should not flash abnormally.

Use Foxboro's dedicated configuration software (e.g., FBM Configuration Tool) to connect the module via RS-485 or Ethernet.

Communication Parameters: Set Modbus address (1-247), baud rate (up to 115.2kbps), and parity (odd/even/none).

AI Parameters: Configure input signal type, engineering units (e.g., °C, kPa), upper/lower alarm values, and filtering time (default 10ms).

AO Parameters: Set output signal type, safe output value (e.g., maintain last value or output 0% in case of failure), and output limiting (prevent overrange).

Manually input standard signals (e.g., 20mA to AI channel), observe if LED lights match software display values (error ≤±0.05% FS).

Send AO commands via software (e.g., output 50%), measure output voltage/current for accuracy, and verify normal load actuation.

Chemical industry: Real-time collection of reactor temperature/pressure and control valve adjustment.

Petroleum refining: Signal processing and output driving in flow metering and liquid level regulation systems.

Substations: Analog collection of bus voltage/current, transformer oil temperature monitoring, and cooling fan control.

Generator sets: Steam pressure/speed signal processing and excitation system regulation output.

Sewage treatment: Collection of parameters like pH and turbidity, frequency adjustment of dosing pumps.

Intelligent buildings: Temperature/humidity control of air conditioning systems, variable frequency adjustment of water supply/drainage pumps.