Overview
The FBM203/b/c/d Platinum/Nickel/Copper RTD Input Modules contain eight resistance temperature
detector (RTD) input channels.Each input channel of the FBM203/b/c modules accepts a 2 or 3-wire
RTD sensor input, within a 0 to 320 ohms (FBM203), 0 to 640 ohms (FBM203b), or 0 to 30
ohms (FBM203c) resistance range. Each input channel of the FBM203d accepts a 4-wire RTD sensor
input, within a 0 to 320 ohms resistance range. Each analog input is galvanically isolated from other
channels and ground.
The modules perform the signal conversion required to interface the electrical input signals from the
field sensors to the optionally redundant fieldbus.
The FBM203/b/c/d modules execute an analog input application program, which provides conversion
time (on a per module basis) and configurable options for Rate of Change Limits.
Two types of passive termination assemblies (TAs) are available for the FBM203/b/c modules:
• DIN rail mounted TAs, similar to those used with the other 200 Series Fieldbus Modules (FBMs)
• Baseplate-mounted TA, which mounts directly onto the field I/O connectors of the 200 Series
baseplate. These TAs provide field I/O wiring support for two FBM203/b/c in paired slots (that is, in
positions 1 and 2, 3 and 4, 5 and 6, or 7 and 8), as shown in Figure 1.
Features
Eight resistance temperature detector (RTD) input channels
• Each analog input is galvanically isolated
• Rugged design suitable for enclosure in Class G3 (harsh) environments
• Execution of an analog input application program that provides conversion time and configurable
options for Rate of Change Limits
• High accuracy achieved by sigma-delta data conversions for each channel
• Termination Assemblies (TAs) for locally or remotely connecting field wiring to the
FBM203/b/c/d
Standard Design
FBM203/b/c/d have 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
Functional Specifications
Environmental Specifications
Physical Specifications
