ABB Bailey SPQRS22: High-Speed Bus Communication Module

Engineered for ABB Bailey INFI 90 Bus Networks

This module manages data transfer across the INFI 90 bus system. It provides reliable bus communication for the ABB Bailey SPQRS22 unit. You will find this bus module in distributed control system racks. Unlike standard interfaces, this version supports high-speed 2.5 Mbps operation. It handles communication between multiple controllers and I/O subsystems.

Technical Specifications & Physical Dimensions

We designed this bus module for high-throughput industrial networks. The table below presents all verified technical specifications.

Functional Architecture and Bus Management

This bus module connects to the INFI 90 controller backplane directly. It uses a dedicated bus controller chip for message handling. You can configure the module for different bus addresses via DIP switches. Moreover, the unit includes automatic collision detection and retry logic. These components resolve bus contention without losing data. Consequently, the board maintains deterministic communication timing for control loops.

Installation and Operational Guidelines

The ABB Bailey SPQRS22 processes 2500 messages per second. It consumes 120 mA at 24V DC during normal operation. You must terminate both ends of the bus cable with 120 ohm resistors. Always use shielded twisted-pair cable with proper grounding. This practice prevents ground loops and signal degradation. Furthermore, the module supports dual redundant bus connections. This feature provides seamless failover if the primary bus fails.

Physical Characteristics and Environmental Limits

This bus module has a rugged, industrial-grade plastic housing. Its moderate 0.55 kg weight allows for easy rack installation. The layout follows ABB Bailey standard INFI 90 specifications. Therefore, it fits securely into any INFI 90 controller rack. The module includes LED indicators for bus activity and error status. In addition, it maintains stable operation between 0°C and 60°C ambient temperature. You can store this unit safely between -25°C and 85°C.

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