The HART Communication Output Module (FBM215) contains eight channel-isolated outputs. The FBM215 supports any mix of standard 4 to 20 mA devices and HART devices. The FBM215 serves as a HART communications field device host, enabling the Foxboro Evo system to request and receive two digital messages per second from each field device. The message pass-through capability can be used to support HART universal, common practice, and device-specific commands, but not the burst communication mode.
FEATURES
Key features of the FBM215 module are:
-Eight channel-isolated output channels, each providing one of the following outputs:
• Standard 4 to 20 mA analog output signal
• Digital HART Frequency Shift Keying (FSK) signal superimposed on a 4 to 20 mA analog output signal
FSK modem dedicated to each output channel for bi-directional digital communications with a HART field device
Galvanic isolation of all output channels from each other, and from ground and module logic
Support for HART universal commands necessary to interface the field device with the Foxboro Evo system database
Rugged design suitable for enclosure in Class G3 (harsh) environments
Termination Assemblies (TAs) for locally or remotely connecting field wiring to the FBM215.
The FBM215 has 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.
VISUAL INDICATORS
Light-emitting diodes (LEDs) incorporated into the front of the module provide visual indication of the module’s operational status, and communication activity of the channels.
EASY REMOVAL/REPLACEMENT
The module can be removed/replaced without removing field device termination cabling, power, or communications cabling.
FIELDBUS COMMUNICATION
A Fieldbus Communication Module or a Control Processor interfaces the redundant 2 Mbps module Fieldbus used by the FBMs. The FBM215 module accepts communication from either path (A or B) of the redundant 2 Mbps fieldbus – should one path fail or be switched at the system level; the module continues communication over the active path.
MODULAR BASEPLATE MOUNTING
The module mounts on a modular baseplate, 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.