---
title: DC motors controlled by reverse polarity
description: When there is a need to integrate DC motors controlled by reverse polarity with the Grenton system, there are two solutions. These are presented below.   Control using Roller Shutter module By choosin
---

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# DC motors controlled by reverse polarity

When there is a need to integrate DC motors controlled by reverse polarity with the Grenton system, there are two solutions. These are presented below.

 

**Control using Roller Shutter module**

By choosing this option, four additional relays will be required.

 

Wiring diagram:

![](https://knowledgebase.grenton.com/hubfs/Knowledge%20Base%20Import/s3.amazonaws.comcdn.freshdesk.comdatahelpdeskattachmentsproduction35176302756originalXNRXxAQpCylFefBdexpDVjYNBtfQf9KtCA-1.png)

To drive the motor in the desired direction, the corresponding relay must be forced:

-  *UP* for a first direction,

-  *DOWN *for a second direction.

**Control using ** Relay 4HP** module**

Wiring diagram:

![](https://knowledgebase.grenton.com/hubfs/Knowledge%20Base%20Import/s3.amazonaws.comcdn.freshdesk.comdatahelpdeskattachmentsproduction35176302926originalfBDifmpeT-DIhsPxWZDY9J1Xmr1RHMXtLg-1.png)

 

To drive the motor in the desired direction, the corresponding pair of relays must be forced:

- *OUT1* and *OUT2 *for a first direction,

- *OUT3* and *OUT4 *for a second direction.

Do not allow a situation where both pairs of relays are driven simultaneously. In such a situation, it is best to prepare logic that will switch off the other pair of relays before switching on the desired pair.

![](https://knowledgebase.grenton.com/hubfs/Knowledge%20Base%20Import/support.grenton.plensupportsolutionsarticles35000208757-dc-motors-controlled-by-reverse-polarityhit.gif)

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