Promax NGM EVO, User Manual

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NGM EVO USER GUIDE
4.2 Serial Ports
The serial ports on the NGMEVO allow communication with external devices to the control, PC-type, PLC
and other.

SER1-PRG : is normally used both for the download of the programs on the control, both for the
debugging from a PC application. It is also the port to use for updating the firmware

SER2 : Can be used for communication with other devices, such as a PLC, inverters or other. CAN BE
CONFIGURED RS485 MODE .
For the electrical signal, the serial ports are in compliance with RS232/RS485.
Use a CABLE WITH SHIELD for serial ports connections
Connect the SHIELD to PIN 5 SER1 or SER2 to NGMEVO ports
Generally the RS232 connection, uses a NULL MODEM cable (pin 2,3,5) CROSSOVER (with inversion on pin
2,3)
Always check the external device that type of connection it accepts
RS232
RS485
Normally the GND pin is not connect