---
title: Connection
description: "**MPRF, MPVF, MPOF** | 24 V a.c. L1 / d.c. + | black | | --- | --- | | 24 V a.c. L2 / d.c. - common ground | blue | | Control Voltage IN 0 – 10 V…"
url: "https://faqdoc.info/en/systemauswahl/motoric-valve-drive-6/motoric-valve-drive-6-24-v-proportional-failsafe-en/assembly/"
updated: "2024-07-22"
category: "Motoric Valve Drive 6: 24 V proportional failsafe"
---

# Connection

**MPRF, MPVF, MPOF**

| 24 V a.c. L1 / d.c. + | black |
| --- | --- |
| 24 V a.c. L2 / d.c. - common ground | blue |
| Control Voltage IN 0 – 10 V | red |
| Feedback 0 – 10 V OUT < 1 mA | yellow |

![](https://faq.testumgebung.digital/wp-content/uploads/2023/11/MPxF_468x5_stetig_Verdrahtung_AM3.svg)

**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.