FOXBORO Contact/dc Expansion Input Interface Module FBM12

FOXBORO Contact/dc Expansion Input Interface Module FBM12
The Contact/dc Input Interface Module (an
expandable main module) and its counterpart
Contact/dc Expansion Input Interface Module
individually function as a 16-channel contact sensor
or 16-channel dc voltage monitor. Each module
performs the signal conversion required to interface
these digital (i.e., on/off state) electrical input signals
from the field sensors to 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 an
expansion module that interfaces field input
signals only, the main module executes either the
Digital I/O, Sequence of Events Monitor, Pulse
Count Inputs or Ladder Logic program. The
configurable option for each program is Input
Filter Time.
• When used in conjunction with an expansion
module that interfaces field input and output
signals, the main module executes either the
Digital I/O or Ladder Logic 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.
Common Characteristics
INPUT
16 independent channels
ISOLATION
Input to Earth (Ground)
The module will withstand, without damage, a
potential of 1250 V ac applied for one minute
between any channel and earth (ground).
CAUTION
This does not imply that these channels are
intended for permanent connection to voltages
of these levels. Exceeding the limits for input
voltages, as stated elsewhere in this
specification, will violate electrical safety
codes and may expose users to electric
shock.
Input Pair to Input Pair
The module will withstand, without damage, a
potential of 1250 V ac applied for one minute
between pairs of channels. Channels are paired
and share a common return; isolation is between
pairs of channels.
NOTE
This does not imply that these channels are
intended for permanent connection to voltages
of these levels. Exceeding the limits for input
voltages, as stated elsewhere in this
specification, will violate electrical safety
codes and may expose users to electric
shock.
Channel Inputs
Inputs are isolated in pairs (e.g., channels 1 and
2 are isolated from channels 3 and 4). When
inputs are used with hazardous voltages (greater
than 60 V dc), both channels of a pair must be
used with hazardous voltages. Hazardous and
non-hazardous voltages must not be mixed
within a channel pair.

The main module is capable of executing any one of
the application programs identified in the following
schedule:
FILTER TIME
Configurable (4, 8, 16, or 32 ms)
POWER REQUIREMENTS
Input Voltage Range (Redundant)
26 to 42 V dc
Consumption
Main Module Only
7 W (maximum)
Main Module Plus Expansion Module
12 W (maximum)
HEAT DISSIPATION
Main Module Only
12 W (maximum)
Main Module Plus Expansion Module
22 W (maximum)
INDICATORS (MOUNTED ON TERMINATION
ASSEMBLY)
Operational Status
2 light-emitting diodes (LED’s) (1 red and 1
green)
Input Channel Status
16 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)
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