Foxboro FBM241 Redundant, Discrete I/O Modules

Foxboro FBM241 Redundant, Discrete I/O Modules

Description

The standard FBM241, FBM241b, FBM241c, and FBM241d each have eight discrete inputs and eight discrete outputs available as a single or redundant module. A redundant pair of the modules combine to provide redundancy at the FBM level with field I/O wired to one common termination assembly.

The Channel Isolated, Discrete I/O Modules (FBM241/b/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.

Features

• 8 discrete inputs
• 8 discrete outputs
• Single or Redundant Module
• 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
• Rugged design suitable for enclosure in Class G3 (harsh) environments
• Executes the Discrete I/O or Ladder Logic program, with these configurable options:

  Input filter time

  Fail safe configuration

  Fail-safe fall-back

  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

Technical Specifications