Friday 1 May 2009

FBM207/FBM207b/FBM207c

Hardware Channel Isolated, Voltage Monitor/Contact Sense Input Interface Module (FBM207/FBM207b/FBM207c)

GENERAL DESCRIPTION


The Channel Isolated, Voltage Monitor/Contact Sense Input Interface Module (FBM207/FBM207b/FBM207c) functions as a 16-channel dc voltage monitor or 16-channel contact sensor. Each channel accepts a 2-wire input from a dc voltage source (FBM207) or pair of contacts or solid state switches (FBM207b/ FBM207c). Associated termination assemblies (TAs) support discrete input signals at voltages of 60 V dc, 120 V ac/125 V dc, or 240 V ac. For voltages higher 
than 60 V dc, the TAs have additional signal conditioning hardware that provides voltage attenuation and optical isolation.The module is available in three distinct types, and each type with its associated TA supports discrete inputs as shown in the table that follows:

FBM207 Provides voltage monitoring at:
–60 V dc
–120 Vac/125 V dc
–240 V ac
Provides switch inputs with:
–External 120 V ac/125 V dc
–External 240 V ac
FBM207b 24 V dc Contact Sense
FBM207c 48 V dc Contact Sense


Each discrete input is galvanically isolated from other 
channels and ground.


FBM207/FBM207b/FBM207c 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 (Class G3), per ISA Standard S71.04.





11GM and 11GH Series Gauge Pressure Transmitters


These transmitters accurately measure gauge pressure and transmit a standard pneumatic signal to receivers 
which may be several hundred metres or yards away.

WIDE RANGEABILITY

Spans are fully adjustable up to a 10:1 ratio, providing Spans are fully adjustable up to a 10:1 ratio, providing wide rangeability in a single instrument. Fewer stand-by transmitters are required.

PROVEN DEPENDABILITY

The 11G Series Transmitters use the same topworks as Foxboro Pneumatic d/p Cell Transmitters. This mechanism has been the standard for differential pressure measurement since Foxboro introduced it nearly 50 years ago. Many thousands of successful, trouble-free installations have demonstrated the exceptional dependability of these outstanding transmitters.

ON-LINE CALIBRATION

These transmitters are equipped with a vernier range adjustment which allows the operator to select one of several predetermined ranges without removing the transmitter from the process. No other calibration apparatus is required for the predetermined ranges.

PRECISE MEASUREMENT

Since accuracy is a function of calibrated span, precision is retained even with highly elevated- or suppressed-zero ranges.