| Basic order number | Name | Manufacturer |
|---|---|---|
| 6ES7321-1CH20-0AA0 | S7-300 Digital Input Module SM 321; DI 16 × 48 - 125 V DC | Siemens |
| DiM___-__-__ | Multi-turn actuator for on-off duty DREHMO, i-matic, DiM | DREHMO |
| DPiM____-__-__ | Part-turn actuator DREHMO, i-matic, DPiM | DREHMO |
| 6ES7321-1FH00-0AA0 | S7-300 Digital Input Module SM 321; DI 16 x 120/230 V AC | Siemens |