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Tis is the part of your small module:






Thanks in advance if you could confirm the pins:

+5v
GND
RX
TX

I see in other Topic: Concerning the wiring-diagram, have a look at the MAX-232 datasheet. Looking at pictures of the PCB the circuit-board is a very standard TTL <--> RS-232 convertor. Looking again at the PCB: 1: +5V 2: RX from PowerMax to external 3+4: TX/DTR from external to Powermax All signals...

Thanks snelvuur,

I am trying to do myself this small module. This module is only for converter signal TTL --- RS232 (by RJ45).

With max232 I think I could the same but I need to Know the pins in the board:

+5v
GND
RX
TX

Thanks in advance

Hello, I have a VISONIC POWERMAX PRO and I am trying to do myself a cable in order to communicate with the software (between rs232 pc and powermax). I would like to Know the pins fron the poermax pro panel: http://www.domoticaforum.eu/uploaded/nicobermejo/20091011132318_Captura.JPG After that I thin...