FBM211 input interface module accepts a 2-wire analog sensor input

Model: FBM211

Features: High precision

The compact FBM211,0 to 20 mA input interface module contains 16 20 Ma DC analog input channels, each accepting a 2-wire analog sensor input such as a 4 to 20 mA transmitter, a line-monitoring digital input signal with a line-end marker resistor, or a self-powered 20 Ma source. The input channel is electrically isolated from the grounding and module logic. The module performs the signal conversion required to interface the electrical input signal from the field sensor to the FCP.

It is part of the Compact 200 Series I/0 subsystem described in the Compact 200 Series /0 Subsystem Overview (PSS41H-2COV).

The compact FBM211 performs analog input applications, which provide configurable options for conversion times and change limit rates.

16 20 mA DC analog input channels

Each group of 8 input channels is isolated in groups

Compact, rugged design for enclosures in G3 (harsh) environments

Execute an analog input application with configurable options for conversion time and rate of change limits

High precision is achieved through sigma-delta data conversion on each channel

The termination assembly (TA) is used to connect field cabling locally or remotely to the compact FBM211t

An external or fieldbus module (FBM) powers the transmitter TA

To achieve high accuracy, the module features a multiplexed Sigma-Delta converter shared across all channels that provides a new analog input reading every 100 ms, as well as a configurable integration cycle to eliminate any process noise and power line frequencies. In each time period, the FBM converts each analog input into a digital value, averages these values over that time period, and provides the average to the controller.