FEATURES
Key features of the FBM244 module are:
- Four 0 to 20 mA analog input channels, used for a HART analog sensor input such as a 4 to 20 mA transmitter or a self-powered 20 mA source
- Four analog output channels, used to drive an external load and produce a 0 to 20 mA output
- Support for the HART universal commands necessary to interface the field device with the
Foxboro Evo system database Both inputs and outputs are galvanically isolated
- Compact, rugged design suitable for enclosure in Class G3 (harsh) environments
- Termination Assemblies (TAs) for locally or remotely connecting field wiring to the FBM244
- Termination Assemblies for per channel internally and/or externally loop powered transmitters.
COMPACT DESIGN
The FBM244 module has a compact design, with a rugged extruded aluminum exterior for physical protection of the circuits. Enclosures specially designed for mounting the FBMs provide various levels of environmental protection, up to harsh environments per ISA Standard S71.04.
EASY REMOVAL/REPLACEMENT
The modules can be removed/replaced without removing field device termination cabling, power or communications cabling.
VISUAL INDICATORS
Light-emitting diodes (LEDs) incorporated into the front of the modules provide visual status indications of Fieldbus Module (FBM) functions.
MODULAR BASEPLATE MOUNTING
The modules mount on a modular baseplate or conversion mounting structure which accommodates up to four or eight FBMs. The modular baseplate is either DIN rail mounted or rack mounted, and includes signal connectors for redundant fieldbus, redundant independent dc power, and termination cables.
FIELDBUS COMMUNICATION
A Fieldbus Communication Module or a Control Processor interfaces the redundant 2Mbps module Fieldbus used by the FBMs. The FBM244 module accepts communication from either path (A or B) of the redundant 2Mbps fieldbus – should one path fail or be switched at the system level, the module continues communication over the active path.