Foxboro High Power Contact/dc Expansion Input Output Interface Module (FBM42)

I/A Series® Hardware

High Power Contact/dc Input/Output Interface Module (FBM41) and

High Power Contact/dc Expansion Input Output Interface Module (FBM42)

The High Power Contact/dc Input/Output Interface

Module (an expandable main module) and its

counterpart High Power Contact/dc Expansion

Input/Output Interface Module individually provide

high current capability on output channels and

isolation on a per channel basis. Each module

provides the following input and output functions for

digital field signals.

OUTPUT FUNCTIONS - 8 channels used for:

• dc output switching with an external source only

at high current ratings (e.g., to control powering

of various external loads).

INPUT FUNCTIONS - 8 channels used collectively for

either:

• contact sensing only, or

• dc voltage monitoring only.

Each module performs the signal conversion required

to interface these digital (i.e., on/off state) electrical

input/output signals from/to the field

sensors/actuators to/from the redundant Fieldbus.

The expandable main module independently

connects to the Fieldbus and is capable of supporting

a single expansion module. The expansion module

connects to the Fieldbus via any expandable main

module and is functionally dependent on the

supporting main module.

When used alone or in conjunction with any

expansion module, the main module executes either

the Digital I/O or Ladder Logic application program.

The configurable options for each program are Input

Filter Time, Fail Safe Configuration, Fail Safe

Fallback, and Sustained or Momentary Outputs. If the

Momentary Output

configuration is selected, then Pulse Output Interval is

also configurable. Configurable options for inputs are

exercised on a per module basis; those for outputs

are exercised on a per channel basis.

The functional, environmental and physical

specifications are applicable to both modules.

Automatic Restart from Overload

If an overload is sensed (either inrush or steady state

current exceeded), the module will open for 64.5 line

cycles and then retry again. This operation will

continue indefinitely for outputs only. Overloads

exceeding 50 A will cause damage to the module.

FUNCTIONAL SPECIFICATIONS

Common Characteristics

ISOLATION

The module will withstand, without damage, a

potential of 600 V ac applied for one minute

between any channel and earth (ground), or

between a given channel and any other channel.

CAUTION

This does not imply that these channels are

intended for permanent connection to

hazardous voltage circuits. Connection of

these channels to voltages greater than

30 Vac or 60 V dc will violate electrical safety

code requirements and may expose users to

electric shock.

POWER REQUIREMENTS

Input Voltage Range (Redundant)

26 to 42 V dc

Consumption

Main Module Only

9 W (maximum)

Main Module Plus Expansion Module

15 W (maximum)

HEAT DISSIPATION

Main Module Only

13 W (maximum)

Main Module Plus Expansion Module

23 W (maximum)

INDICATORS (MOUNTED ON TERMINATION

ASSEMBLY)

Operational Status

2 light-emitting diodes (LED’s) 1 red and 1 green)

Input Channel Status

8 LED’s (1 per channel)

Output Channel Status

8 LED’s (1 per channel)

FIELD TERMINATION CONNECTIONS(A)

Discrete Wire Blocks

32 screw-clamp terminals (2 blocks using

16 terminals per block)

Plug Connector Block

34-pin connector. Mates with:– Burndy MSD 34 PM 118

(plug with bar-type cable clamp)– Burndy MSD 34 PM 124

(plug with clam shell hood)– Burndy MSD 34 PM 824

(plug with suitcase hood)– or equivalent

Direct Connection Block

32 screw-clamp terminals

COMMUNICATION

Via the redundant Fieldbus (main module only