BrandABB
ModelDX571
LifecycleActive
ABB / AC500 S500-eCo mixed relay I/O module
ABB DX571 8-Input 8-Relay-Output Digital Module
Eight 24 V AC/DC inputs and eight normally-open relay outputs divided into three galvanically isolated groups.
01
Product Identification
ABB DX571, article 1TNE968902R2302, combines eight 24 V AC/DC digital inputs with eight normally-open relay outputs. The input channels form one group, while the relay outputs form two groups of four, producing three galvanically isolated groups in total.
02
Engineering Data
| Manufacturer | ABB |
|---|---|
| Article Number | 1TNE968902R2302 |
| Product Family | AC500 S500-eCo |
| Module Type | Digital input/output module |
| Digital Inputs | 8 channels, 24 V AC/DC |
| Digital Outputs | 8 normally-open relay outputs |
| Output Grouping | 2 groups of 4 relay channels |
| Galvanic-Isolation Groups | 3 total: 1 input group and 2 output groups |
| Supported Relay Voltages | 24 V AC/DC or 100-240 V AC |
| Maximum Relay Current | 2 A at 24 V; 1.5 A at 120/240 V AC pilot duty |
| Process Supply | 24 V DC at L+ |
| Process-Supply Current | 50 mA |
| Recommended Output Protection | 3 A fast-acting fuse |
| Maximum Module Dissipation | 2.3 W |
| Terminal Blocks | One 9-pin and one 11-pin block, ordered separately |
| Lifecycle | Active |
03
Functions
- Reads eight 24 V AC or DC field signals through one isolated input group.
- Switches eight loads through normally-open relay contacts arranged as two output groups.
- Provides individual yellow state indication for each input and relay output.
- Maintains galvanic separation between the input group, both output groups and module electronics.
- Uses removable terminal blocks to support organized S500-eCo field wiring.
04
Applications
- Mixed AC/DC sensor monitoring with relay-actuated field circuits in one module.
- Contactor, pilot and alarm control within the documented relay contact limits.
- S500-eCo installations that require two independently isolated groups of four outputs.
- Maintenance replacement where normally-open relay behavior and three-group isolation must be retained.
- Control panels needing 24 V inputs and higher-voltage relay switching from the same station slot.
05
Lifecycle
- ABB lists DX571 article 1TNE968902R2302 in the Active lifecycle phase.
- Retain the 9-pin and 11-pin terminal-block selection in the equipment record.
- DX561 uses transistor outputs and should not replace the relay-based DX571 without circuit redesign.
- External contact protection and appropriate voltage segregation remain necessary.
- Test the input group and both relay groups independently after replacement.
