FOXBORO FBM241 Voltage Monitor Invensys Process System PLC Termination Assy


Features
• 8 discrete inputs
• 8 discrete outputs
• Supports discrete inputs/output signals at voltages of:
◦ 15 to 60 VDC
◦ 120 VAC/125 VDC
◦ 240 VAC
• Each input and output is galvanically isolated: group isolated when used with
external excitation
• Compact, rugged design suitable for enclosure in Class G3 (harsh) environments
• Executes the Discrete I/O or Ladder Logic program, with the following
configurable options: Input Filter Time, Fail Safe Configuration, Fail-Safe FallBack, and Sustained or Momentary Outputs
• Various Termination Assemblies (TAs) that contain:
◦ Current limiting devices
◦ Fuses
◦ Relay outputs
◦ Relay outputs with internal or external power source and fusing
◦ Solid state outputs


Overview

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

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.