![background image](http://html1.mh-extra.com/html/aim/ecumaster-emu-black/ecumaster-emu-black_user-manual_2871722004.webp)
3
3.2
EMU Black
EMU Black ECU, as well, features serial communication protocol on EMU Black front connectors whose
pinout is shown below:
RS232TX: pin 11; 39 pins connector (Black)
RS232RX: pin 24; 39 pins connector (Black)
Please note
: with serial communication protocol it is mandatory to connect ECU GND with AiM device
GND as well as ECU TXD is to be connected to AiM ECU RS232 TX (or AiM RS232RX for older products)
and vice versa.