35FB90 Multiprocessor Control Module | ABB

The ABB 35FB90, also cataloged as the 35FB90 Multiprocessor Control Module, operates as a dedicated hardware component for parallel task execution and real-time processing within ABB Ability System 800xA platforms. Driven by a multiprocessor architecture and 256 KB memory, the module executes real-time control algorithms, integrated fault monitoring, and signal processing across 16 digital inputs and 16 digital outputs. Powered by a 24 VDC supply, it maintains continuous operation in thermal environments from -40 deg C to +70 deg C within a compact enclosure measuring 120 mm x 80 mm x 60 mm and weighing 0.5 kg.

Hardware Specifications

Backplane Bus Communication Velocity and Deterministic Networks

When integrated into System 800xA rack structures, the multiprocessor architecture coordinates high-speed backplane bus communication velocity across Ethernet and RS485 interfaces. Parallel task execution handles high I/O density scaling and adaptive algorithm execution while preventing scan cycle jitter. Onboard firmware flash compatibility enables real-time fault monitoring, ensuring synchronized controller state execution without interrupting processing cycles on the main system bus.

Frequently Asked Questions

Q: Does the module support online maintenance or hot-swapping during active operation?

A: Yes, the unit is hot-swappable and can be replaced or inserted into an active System 800xA rack without de-energizing the backplane or interrupting continuous system operation.

Q: What are the installation requirements for communication lines on the Ethernet and RS485 ports?

A: RS485 serial lines require shielded twisted-pair cabling with terminal matching resistors enabled at segment ends, while Ethernet ports require standard shielded industrial twisted-pair cabling bonded to cabinet ground to prevent high-frequency noise interference.

Field Installation Guidelines

• Align the module chassis guides with the subrack slot and push firmly until the rear backplane connectors are fully engaged.
• Connect external 24 VDC supply wiring to designated power terminals using properly sized and crimped ferrules.
• Ensure all RS485 and Ethernet communication line shields are grounded directly to the panel earth bar to maintain signal integrity.
• Maintain unobstructed air space around the module frame to prevent thermal build-up and keep ambient temperatures within the specified -40 deg C to +70 deg C operating range.