





The ABB TU551-CS31 is a dedicated S500 interface terminal unit designed to bridge CS31 protocol-based field devices with central control systems. This unit features robust screw terminals for secure and maintenance-friendly connections, making it a reliable choice for distributed I/O architectures in industrial automation. With a compact footprint and IP20 protection, the TU551-CS31 is engineered for straightforward DIN-rail mounting within control cabinets, ensuring efficient space utilization. Its 24 V DC operation and extended temperature tolerance support consistent performance in demanding manufacturing environments.
| Specification | Details |
|---|---|
| Product Type | Interface Terminal Unit |
| Model | TU551-CS31 |
| Protocol Support | CS31 (screw terminals) |
| Number of Analog Configurable I/Os | 0 |
| Supply Voltage | 24 V DC |
| Degree of Protection | IP20 |
| Ambient Air Temperature (Operation) | 0 … +60 °C |
| Ambient Air Temperature (Storage) | -40 … +70 °C |
| Product Net Weight | 0.236 kg |
| Product Net Depth / Length | 28 mm |
| Product Net Height | 135 mm |
| Product Net Width | 67.5 mm |
| Gross Weight | 0.266 kg |
| Package Level 1 Dimensions (L x W x H) | 147 mm x 78 mm x 40 mm |
| Package Level 1 Units | 1 carton |
| Product Main Type | TU551 |
| Product Name | Distributed Automation I/Os |
| eClass | 27-24-22-92 |
| ETIM 8 | EC000810 – PLC mounting rack |
| UNSPSC | 32151703 |
| WEEE B2C / B2B | Business To Business |
| WEEE Category | 5. Small Equipment (No External Dimension More Than 50 cm) |
| Made To Order | No |
| Minimum Order Quantity | 1 piece |
| Order Multiple | 1 piece |
| Selling Unit of Measure | piece |
| CN8 (Customs Tariff) | 85389091 |

What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22