FBM42 P0902XB Foxboro Digital I/O Module

8 DI 8 DO Expansion Module | Foxboro FBM42 P0902XB I/A Series

8 DI 8 DO Expansion Module | Foxboro FBM42 P0902XB I/A Series

Availability: 10 left in stock

Foxboro FBM42 P0902XB I/A Series Expansion Module The Foxboro FBM42 P0902XB, also cataloged as the FBM42 Digital I/O Expansion Module,...

SKU: P0902XB

Manufacturer: Foxboro
Product No.: P0902XB
Product Type: Digital I/O Modules
Product Origin: USA
Payment:T/T, Western Union
Weight: 800g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Foxboro FBM42 P0902XB I/A Series Expansion Module

The Foxboro FBM42 P0902XB, also cataloged as the FBM42 Digital I/O Expansion Module, operates as a dedicated hardware component for contact input and VDC output signal processing within Foxboro I/A Series DCS networks. Designed to expand the channel capacity of primary main modules, the assembly accommodates 8 discrete digital inputs and 8 discrete digital outputs to convert field electrical signals for real-time bus transmission.

Hardware Specifications

Parameter	Specification
Model	FBM42 P0902XB
Brand	Foxboro
Origin	United States
Weight	0.80 kg
Dimensions	11.4 cm x 5.15 cm x 14.7 cm
Operating Temp	-20 to +70 deg C
Power Consumption	3 W (Maximum)
Channel Configuration	8 Contact/VDC Inputs / 8 VDC Outputs
Isolation Rating	Galvanic Isolation between Field and Logic
Terminal Connection	Removable Screw-Terminal Blocks
Bus Interface	Internal Expansion Bus via Baseplate
Enclosure Rating	IP20

Process Control & Digital Network Connectivity

The FBM42 interfaces through an expandable main module to exchange discrete field signals with control processors. By maintaining galvanic isolation between field-side contacts and internal logic circuits, the module shields system electronics from field-induced electrical surges and ground loops. Channel-to-channel isolation prevents cross-talk across digital input loops and 24 VDC output lines, ensuring deterministic signal state validation for process interlocks and alarm actuation.

Frequently Asked Questions

Q: Can the FBM42 module operate as a standalone module directly on the fieldbus?

A: No. The FBM42 is an expansion module and must connect directly to an expandable main module (such as an FBM41) via the baseplate expansion bus to share digital processor and fieldbus transceiver resources.

Q: How does the module maintain field signal isolation?

A: Optical coupler arrays provide galvanic isolation between the field wiring terminals and the backplane logic bus, preventing common-mode voltage spikes from damaging backplane electronics.

Q: Does replacing the FBM42 module require shutting down the entire baseplate?

A: No. The module supports live removal and insertion (hot-swapping) on active baseplates, provided the associated primary main module and software configuration permit fieldbus expansion re-initialization.

Field Installation Guidelines

Mount the FBM42 into the designated expansion slot adjacent to its primary main module on the I/A Series baseplate. Press the module firmly onto the backplane connectors until the mechanical latch engages securely. Tighten top and bottom retaining screws to ensure proper grounding contact and resistance against cabinet vibration.

Strip field conductors to the recommended length before securing them into the removable terminal blocks using 18-22 AWG copper wire. Separate 24 VDC output power cables from low-voltage instrument signals inside the wire ducting. Connect all cable shields to the cabinet ground bus bar to maintain electromagnetic compliance across discrete signal paths.

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