| 24 V a.c. L1 / d.c. + | black |
| 24 V a.c. L2 / d.c. – | blue |
| Modbus D+ RS485-A | red |
| Modbus D- RS485-B | yellow |
Electrical connection 24 V a.c. / d.c. L1 (+) L2 (-)
Connection line
We recommend the following maximum cable lengths for installing a 24 V system:
| Cable | Section | Length |
| Standard DDC line | 0.22 mm² | 20 m |
| J-Y(ST)Y | 0.8 mm² | 45 m |
| NYM / NYIF | 1.5 mm² | 136 m |
Transformer/power supply unit
A safety isolating transformer according to EN 61558-2-6 or a switching power supply according to EN 61558-2-16 must always be used.
The dimensioning of the transformer or the switching power supply results from the maximum making capacity of the OEM Actuators.
MPM Modbus
| Feature | Description |
| BK | 24 V a.c. / +24 V d.c. |
| BU | Ground |
| RD | Modbus D+ / RS485-A |
| YE | Modbus D- / RS485-B |