The ABB DC551-CS31:S500,BUS module provides reliable and flexible I/O expansion for your ABB AC500 PLC system. With 8 digital inputs and 16 configurable digital inputs/outputs, this CS31 slave module is designed to meet the demands of complex industrial automation applications, even in harsh environments. Its expandable design supports connection of up to 7 additional I/O modules, enabling scalable and adaptable control solutions.
This module offers significant advantages for system integrators and maintenance engineers seeking dependable and adaptable I/O solutions:
Robust design for operation in challenging industrial settings.
Flexible configuration with 8 DI and 16 configurable DI/DO.
Scalable expansion capabilities for growing system needs.
Seamless integration with ABB AC500 PLC systems via the efficient 1-wire CS31 interface.
Compliant with relevant industry standards for performance and safety.
Key Features
8 Digital Inputs (24VDC)
16 Configurable Digital Inputs/Outputs (24VDC, 0.5A)
CS31 Slave Module for AC500 PLCs
Expandable up to 7 additional I/O modules
1-wire CS31 Interface for efficient communication
Robust design for industrial environments
Applications
Industrial Automation and Control Systems
Process Automation
Machine Control
Robotics
Harsh Environment Applications
Frequently Asked Questions
While designed for the AC500 platform, compatibility may vary depending on the specific PLC model and firmware version. Consult the ABB compatibility documentation or contact our technical support for confirmation.
Additional I/O modules are connected via the CS31 bus using standard ABB cabling and connectors, creating a daisy-chain configuration. Detailed connection instructions can be found in the product manual.
Technical Specifications
Part Number
DC551-CS31:S500,BUS
Digital Inputs
8 (24VDC)
Digital Inputs/Outputs
16 (24VDC, 0.5A)
Communication Interface
CS31 (1-wire)
Mounting
DIN Rail
HS Code
85389091
Country of Manufacture
Germany
Part Number
DC551-CS31:S500,BUS
Digital Inputs
8 (24VDC)
Digital Inputs/Outputs
16 (24VDC, 0.5A)
Communication Interface
CS31 (1-wire)
Mounting
DIN Rail
HS Code
85389091
Country of Manufacture
Germany
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
● frequently asked questions
Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
What product ranges do you supply
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Can you help specify the correct part?
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...