Foxboro FBM242 Output Module

Foxboro FBM242 Output Module

DESCRIPTION

The FBM242 Discrete Output Module contains 16 discrete output channels, which are sourced externally, rated up to 2 A at 60 V dc. Associated termination assemblies (TAs) provide for discrete outputs to loads of 2 A at 60 V dc, relay outputs (120 V ac/125 V dc, or 240 V ac), or relay outputs with power distribution and fusing. Each output is fully isolated from other channels and ground. The module interfaces electrical output signals from a control processor to the field devices. It executes a digital I/O application program, with ladder logic support, and provides a Fail-Safe Configuration option for the outputs.

FEATURES

Key features of the FBM242 modules are:

 Sixteen discrete outputs 

 Supports discrete output signals at voltages of: 

• 15 to 60 V dc 

• 120 V ac/125 V dc 

• 240 V ac 

 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 the following configurable options: Input Filter Time, Fail Safe Configuration, Fail-Safe Fall-Back, and Sustained or Momentary Outputs 

 Various Termination Assemblies (TAs) that contain: 

• Current limiting devices 

• Fuses 

• Relay outputs with external power source, fusing, and power distribution 

• Solid state outputs 

• Redundant power distribution.

FIELDBUS COMMUNICATION

A Fieldbus Communications Module or a Control Processor interfaces to the redundant 2 Mbps module Fieldbus used by the FBMs. The FBM242 accepts communication from either path (A or B) of the redundant 2 Mbps Fieldbus — should one path fail or be switched at the system level, the module continues communication over the active path.

FUNCTIONAL SPECIFICATIONS

Output Channels：Sixteen isolated channels.

Applied Voltage：15 to 60 V dc (maximum)

Load Current：2.25 A (maximum) per channel

On-State Voltage Drop：0.2 V (maximum) at 2.25 A

Off-State Leakage Current：0.1 mA (maximum)

INPUT VOLTAGE RANGE (REDUNDANT)：24 V dc +5%, -10%

CONSUMPTION (MAXIMUM)：3 W (maximum) at 24 V dc