ABB 1SAP221100R0001 CI590-CS31-HA Bus Module

Technical Specifications and Communication Features

The ABB 1SAP221100R0001 redundant bus module, also known as the CI590-CS31-HA, serves as a high-availability interface between the AC500/S500 PLC system and the CS31 fieldbus network. This module acts as a CS31 slave and features a media-redundant dual-bus interface for uninterrupted communication . It provides 16 configurable digital I/O channels operating at 24V DC with a 0.5A output current per channel . The module supports expansion with up to seven additional S500 I/O modules for scalable system architectures . Its compact dimensions measure 67.5 mm x 76 mm x 62 mm (W x H x D), and it weighs only 0.119 kg .

Parameter	Specification
Manufacturer	ABB
Model Number	1SAP221100R0001 / CI590-CS31-HA
Product Family	AC500 / S500 I/O
Function	CS31 slave interface with media redundancy
Configurable I/O Channels	16 (DI/DO)
Input Voltage	24V DC (20.4–28.8V range)
Output Current per Channel	0.5A
Response Time	0.1–32 ms (adjustable)
Communication Interfaces	Dual CS31 bus ports (redundant)
Maximum Transmission Distance	1200 m
Data Transfer Rate	Up to 1 Mbps
Protection Degree	IP20
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +85°C
Dimensions (W x H x D)	67.5 x 76 x 62 mm
Net Weight	0.119 kg
Standards Compliance	IEC 61131-2, CE, UL
Product Status	Active

Functional Capabilities and Redundancy Architecture

The 1SAP221100R0001 module actively manages data exchange between the PLC and field devices through its dual CS31 bus interfaces. The media-redundant design ensures continuous operation: when one communication path fails, the module automatically switches to the backup path within milliseconds . Each of the 16 channels can be configured as either a digital input or a digital output through the system software, offering exceptional flexibility for diverse applications . The module’s 27 LED indicators provide clear visual status for power, communication health, and each I/O channel . Additionally, the module delivers 1500V AC galvanic isolation between the bus interface and the I/O channels, protecting the system from electrical noise and transients .

Application Scenarios

This redundant bus module suits mission-critical automation environments where communication reliability directly impacts operational continuity . It performs effectively in petrochemical processing, power generation, and water treatment facilities where uninterrupted control is essential . The ABB CI590-CS31-HA also integrates into manufacturing lines and material handling systems, providing fault-tolerant connectivity for distributed sensors and actuators . Many facilities rely on this module to build scalable, high-availability CS31 networks that can extend up to 1200 meters while supporting up to 64 distributed nodes .