Products Overview
The FBM207C Voltage Monitor/Contact Sense Input Module serves as a dual-purpose 16-channel
solution, functioning either as a DC voltage monitor or a contact sensor. Each channel accepts a 2-
wire input—compatible with DC voltage sources (as in the FBM207 variant) or pairs of contacts/solid-
state switches (as in the FBM207b/FBM207c variants). Associated termination assemblies (TAs)
support discrete input signals across a broad voltage range: 60 V DC, 120 V AC/125 V DC, and 240 V
AC. For input voltages exceeding 60 V DC, the TAs are equipped with additional signal conditioning
hardware, delivering voltage attenuation and optical isolation to ensure signal integrity and
operational safety.
Key features of the FBM207C modules
1.Equipped with 16 discrete input channels for versatile voltage monitoring and contact sensing
applications.
2.Broad voltage compatibility for discrete input signals:
●15 to 60 V DC (contact sense)
●120 V AC / 125 V DC (voltage monitoring or switch inputs)
●240 V AC (voltage monitoring or switch inputs)
3.Robust isolation design: Each input features galvanic isolation; supports group isolation when
paired with external excitation.
4.Flexible deployment options: Available as single or redundant modules to meet reliability
requirements.
5.Rugged construction tailored for Class G3 (harsh) environment enclosures, ensuring durability in
demanding industrial settings.
6.Versatile program execution: Runs programs for Discrete Input, Ladder Logic, Pulse Count, and
Sequence of Events, with a configurable Input Filter Time option.
7.Flexible termination support: Termination Assemblies (TAs) enable local or remote connection of
field wiring to the FBM207.
8.Loop power compatibility: TAs available for per-channel internally and/or externally loop-powered
devices.
9.Enhanced signal conditioning: Select TAs integrate additional hardware for voltage attenuation and
optical isolation, optimizing signal integrity for high-voltage inputs.
Fieldbus Communication Capability
A Fieldbus Communications Module or Control Processor interfaces with the redundant 2 Mbps
module Fieldbus utilized by FBMs. The FBM242 is designed to accept communications from either
path (A or B) of this redundant 2 Mbps Fieldbus. In the event that one path fails or undergoes a
system-level switchover, the module seamlessly continues communication via the active path,
ensuring uninterrupted data transmission for industrial control operations.
Functional Specifications
| Core Input Configuration |
●16 isolated and independent discrete input channels, supporting dual functions as a DC voltage monitor and contact sensor. ●Compatible voltage ranges: 15 to 60 V DC (contact sense), 120 V AC/125 V DC (voltage monitoring/switch inputs), 240 V AC (voltage monitoring/switch inputs). |
| Signal Performance & Accuracy |
●Pulse Count Accuracy: No missing pulses for pulse rates ranging from 0 to 250 Hz. ●Filter/Debounce Time: Configurable options include No Filtering, 4 ms, 8 ms, 16 ms, or 32 ms (available for firmware version 1.25H or later). ●Contact Sensor Parameters: Open-circuit voltage of 48 V DC ±15%, typical short- circuit current of 3.2 mA, maximum on-state resistance of 1.0 kΩ, minimum off-state resistance of 100 kΩ. ●Voltage Monitor Parameters: Logic One (on-state) voltage 15-60 V DC, Logic Zero (off-state) voltage 0-5 V DC, typical current 1.4 mA at 5-60 V DC; maximum on-state source resistance 1 kΩ (15 V DC), minimum off-state source resistance 100 kΩ (60 V DC). |
