How to use a serial connection for programming Unitronics PLC
Nahum Stern
Dec-26th, 2018 10:57

Before you try to communicate with PLC you should check you have the following cable & adaptor:

1. Male RJ11 Type connector.

2. A female D-Type MJ10-22CS25.

You can use USB to Serial adaptor:


*Some PLCs need to add a communication module to be able connecting this method.

Connection have to be implemented as following:

Hope that this information helped you.


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