ABB / AC500 S500 CS31 interface with local digital I/O
ABB DC551-CS31 CS31 Communication Interface Module
A CS31 bus interface combining eight fixed 24 V DC inputs, 16 configurable digital channels and expansion support for a remote S500 station.
BrandABB
ModelDC551-CS31
LifecycleActive
Product Identification
ABB DC551-CS31, article 1SAP220500R0001, connects an S500 remote I/O station to the CS31 fieldbus while also providing local digital signals. The module carries eight fixed inputs, 16 configurable input/output points and fast-counter capability.
Engineering Data
| Manufacturer | ABB |
|---|---|
| Article Number | 1SAP220500R0001 |
| Product Family | AC500 S500 |
| Network Role | CS31 communication interface |
| Fixed Digital Inputs | 8 channels, 24 V DC |
| Configurable DC Channels | 16 inputs/outputs |
| Maximum Output Current | 0.5 A per configured output |
| Local Expansion | Up to 7 S500 I/O modules |
| Address Setting | Two front rotary switches |
| Module Supply | 24 V DC |
| Typical Module Current | 15 mA |
| Isolation | Module-wise galvanic isolation |
| Compatible Terminal Units | TU551-CS31 or TU552-CS31 |
| Maximum Unloaded Dissipation | 6 W |
| Product Lifecycle | Active |
Functions
- Connects a remote S500 I/O group to an ABB CS31 fieldbus installation.
- Acquires eight fixed digital inputs directly at the interface module.
- Allows 16 local points to be configured as digital inputs or transistor outputs.
- Supports attachment of up to seven additional S500 I/O modules at the remote station.
- Uses rotary switches and front diagnostics for station addressing, commissioning and fault isolation.
Applications
- Distributed I/O islands on existing ABB CS31 machine or plant networks.
- Remote control panels that combine local signals with additional S500 expansion modules.
- Service replacement for active DC551-CS31 stations using the standard article.
- Brownfield control upgrades that retain a documented CS31 field layer.
- Machines requiring local counter capability at a CS31-connected station.
Lifecycle
- ABB identifies 1SAP220500R0001 as Active.
- Retain the station address, CS31 bus parameters and complete expansion order in the maintenance record.
- Keep DC551-CS31 separate from the XC environmental variant and non-CS31 digital modules.
- Record local channel direction and counter use before disconnecting the field terminals.
- After replacement, verify bus communication, every local point and all attached expansion modules.
