FOXBORO FBM241

Description

The Compact FBM241, FBM241c, and FBM241d each have eight discrete inputs and
eight discrete outputs.
The Compact Channel Isolated, Discrete I/O Interface Modules (Compact FBM241/c/
d) have eight discrete input channels and eight discrete output channels. Associated
termination assemblies (TAs) support discrete input or output signals at voltages of
under 60 VDC, 120 VAC/125 VDC, or 240 VAC.
Depending on the type of I/O signal required, the TAs contain current limiting devices,
fuses, relays, or relay outputs with internal or external power source and fusing.
The module is available in three distinct types and each type with its associated TA
supports the following discrete inputs and outputs:
Type Inputs Outputs
Compact
FBM241
15 to 60 VDC, 125 VDC, 120
VAC, or 240 VAC Switch
(external or internal power
source)
15 to 60 VDC at 2 A, or 30 VDC
at 5 A, or 125 VDC at 0.5 A, or
120 VAC at 5 A, or 240 VAC at
5 A Switch (external power
source)
Compact
FBM241c
15 to 60 VDC Contact
(unprotected -no fuse, or
protected – fused)
15 to 60 VDC at 2 A, or 240
VAC at 5 A Switch (external
power source)
FBM241d 15 to 60 VDC Contact 12 VDC at 12 mA Switch
(internal power source)
Each type of Fieldbus Module (FBM), without signal conditioning, uses a 15 to 60
VDC input or output signal. Each discrete input and output is galvanically isolated
from other channels and ground. When used with external excitation, each discrete
input and output is group isolated.
The module performs signal conversion required to interface electrical input signals
from field sensors to the optionally redundant fieldbus. It executes the Discrete I/O or
Ladder Logic program, with the following configurable options: Input Filter Time, Fail
Safe Configuration, Fail-Safe Fall-Back, and Sustained or Momentary Outputs. If the
Momentary Output configuration is selected, then Pulse Output Interval is also
configurable.