Module ABB DO573
| S500-eCo I/O modules | Number of I/Os | Features |
| DI561 | 8DI | 24 V DC |
| DI562 | 16DI | 24 V DC |
| DI571 | 8DI | 100-240 V AC |
| DI572 | 16DI | 100-240 V AC |
| DO561 | 8DO | Transistor |
| DO562 | 16DO | Transistor |
| DO571 | 8DO | Relay |
| DO572 | 8DO | Triac |
| DO573 | 16DO | Relay |
| DX561 | 8DI / 8DO | 24 V DC / Transistor |
| DX571 | 8DI / 8DO | 24 V DC / Relay |
| DC561 | 16DC | 24 V DC / Transistor, configurable, Interfast |
| DC562 | 16DC | 24 V DC / Transistor, configurable |
| AI561 | 4AI | V, mA |
| AI562 | 2AI | RTD |
| AI563 | 4AI | Thermocouple |
| AO561 | 2AO | V, mA |
| AX561 | 4AI / 2AO | V, mA |
| FM562 | 4DI 4 pulse outputs | Pulse Train Outputs for 2 axes |
