FOXBORO FBM216B P0927AJ  Isolated Redundant

An FBM216B pair provides up to eight redundant HART® input channels. In a repair situation, when a single module is replaced the inputs are maintained by the redundant module. HART inputs are electrically compatible with 4-20 mA signals, permitting the plant to upgrade field devices without the need to change the control system.

OVERVIEW：

The FBM216B Redundant HART Communication Input Module contains eight individually isolated input channels. It supports any mix of standard 4 to 20 mA devices and HART devices.

A pair of modules combines to provide redundancy at the Fieldbus Module (FBM) level, with field inputs wired to one common termination assembly . In this configuration, one FBM216b is the Master, and the other is the Tracker.

The FBM216b provides individually isolated power supplies to power each of the eight channels.

Optionally, the channels for this module can be powered by an external power supply. However,when a common external power supply is used with two or more channels, a Cable Balun module is required to prevent HART communication channel crosstalk.

Key features of the FBM216b module are:

Each channel accepts one of the following inputs:

 Standard 4 to 20 mA analog sensor signal

 Digital HART Frequency Shift Keying (FSK)

signal superimposed on a 4 to 20 mA analog signal.

Module pair offers redundancy at the FBM level FSK modem dedicated to each input channel for bi-directional digital communications with a HART field device

Analog to digital conversion of each of the 4 to 20 mA input signal from the HART devices.

Support for the HART universal commands necessary to interface the field device with the Foxboro Evo system database.

Per channel galvanic isolation of each of the 8 input channels from each other, ground and module.

Compact, rugged design suitable for enclosure in Class G3 (harsh) environments.

High accuracy achieved by sigma-delta data conversions for each channel.