Technical Specifications
Compatible Termination Assemblies
Note: The P0916JS termination assembly is specifically designed for the FBM207b. Do not substitute terminations intended for FBM207c (48 V) or other variants.
Key Features & Benefits
24 V DC Contact Wetting from Module
The FBM207b supplies 24 V DC contact wetting voltage directly from the module, eliminating the need for external power supplies for contact sensing applications. This simplifies field wiring, reduces installation cost, and minimizes potential failure points .
Sixteen Isolated Contact Sense Channels
The module provides 16 fully isolated, independent contact sense input channels, each capable of detecting dry contact closures from field devices. The per-channel galvanic isolation withstands 600 V AC for one minute, preventing a single field wire short or ground fault from crashing the entire input bank and triggering false interlock trips .
Configurable Input Debounce Filtering
The module supports software-configurable input debounce filtering with options for no filtering, 4 ms, 8 ms, 16 ms, or 32 ms. This eliminates noise-triggered false status indications from motor start electrical noise and contact bounce, while preserving valid equipment fault signals .
Redundant Fieldbus Architecture
As a main-type FBM, the module independently connects to the redundant 2 Mbps Fieldbus. If one Fieldbus segment fails, the module automatically switches to the alternate path, maintaining continuous data exchange with the control processor without process interruption .
Hot-Swap Capability
The FBM207b supports live insert and removal on an energized I/A Series baseplate. Technicians can replace a failed unit without powering down the rack or disconnecting field wiring. When redundant, either module may be replaced without upsetting field input signals to the good module .
Sequence of Events (SOE) Support
When used with I/A Series software version 8.x or later, the module supports Sequence of Events timestamping. Optional GPS synchronization provides 1 millisecond precision with ±0.5 millisecond accuracy for precise event reconstruction in process upset analysis .
Redundant Configuration Ready
The module can be deployed in redundant pairs using a redundant adapter. In a redundant configuration, contact sense power from each module is diode OR'd together in the redundant adapter to assure redundant power. The CINR function block handles input reads and initialization logic for the redundant channels .
Rugged Industrial Construction
Rated for Class G3 (Harsh) environmental contamination per ISA S71.04, the module operates reliably in corrosive chemical plants, coastal installations, and other demanding industrial settings. It operates across a temperature range of -40°C to +70°C .
Recommended Related Models
Compatible I/A Series Components:
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Control Processors: CP60, FCP270, FCP280
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Termination Assemblies: P0916JS (compression), P0916PP, P0916XT
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Redundant Adapter: Available for compact redundant configurations
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Fieldbus Communication Modules: FCM10E, FCM2F2
Frequently Asked Questions (FAQ)
Q1: What is the primary function of the Foxboro FBM207b (P0914WH)?
The FBM207b is a 16-channel contact sense input module for the I/A Series and Foxboro Evo DCS. It detects dry contact closures from field devices such as valve limit switches, motor starter auxiliary contacts, and breaker status contacts, converting these physical states into digital signals for the control processor via the redundant Fieldbus .
Q2: What wetting voltage does the FBM207b use?
The module operates with a 24 V DC contact wetting voltage (±15%), drawing approximately 3.2 mA short-circuit current per channel. This is distinct from the FBM207c, which uses 48 V DC wetting voltage .
Q3: What are the logic threshold specifications?
The module recognizes an on-state (closed contact) at ≤ 1.0 kΩ resistance and an off-state (open contact) at ≥ 100 kΩ resistance .
Q4: What debounce filter options are available?
The FBM207b supports software-configurable debounce filtering with options for no filtering, 4 ms, 8 ms, 16 ms, or 32 ms per channel. This eliminates noise-triggered false status indications while preserving valid equipment signals .
Q5: Can the FBM207b be used in redundant configurations?
Yes. The module can be deployed in redundant pairs using a redundant adapter. In a redundant configuration, contact sense power from each module is diode OR'd together to assure redundant power. The CINR function block validates inputs across redundant modules, ensuring continuous operation during maintenance or failure .
Q6: Does the FBM207b support Sequence of Events (SOE) recording?
Yes. When used with I/A Series software version 8.x or later, the module supports Sequence of Events timestamping. Optional GPS synchronization provides 1 millisecond precision with ±0.5 millisecond accuracy for precise event reconstruction .
Q7: What is the difference between FBM207b and FBM207c?
The primary difference is the contact wetting voltage: the FBM207b uses 24 V DC, while the FBM207c uses 48 V DC. The termination assemblies are not interchangeable between these variants .
Q8: Can the FBM207b be hot-swapped?
Yes. The module supports live insert and removal on an energized baseplate. The module can be removed or replaced without removing field device termination cabling, power, or communication cabling. When redundant, either module may be replaced without upsetting field input signals to the good module .
Q9: What termination assembly is compatible with the FBM207b?
The P0916JS is the dedicated compression termination assembly for the FBM207b. Alternative options include the P0916PP and P0916XT. Never use termination assemblies designed for FBM207c or other variants, as mismatched internal terminal pinouts deliver incorrect voltage levels .
Q10: What environmental conditions can the FBM207b withstand?
The module is rated for Class G3 (Harsh) environmental contamination per ISA S71.04. Operating temperature is -40°C to +70°C, with relative humidity of 5% to 95% non-condensing .
Q11: What are typical applications for the FBM207b?
The module is commonly used for: process control valve position feedback in chemical plants, safety interlock monitoring in oil and gas facilities, equipment status detection in power generation stations, alarm and event logging, and pump/motor status monitoring in water treatment systems .
Q12: Does this module come with a warranty?
Yes. This offering includes a 1 Year Warranty on the module. Verify warranty terms with your supplier before purchase.
