User`s manual

Table Of Contents
Connectors & Jumpers 25
M-322
COM4 RS-242/422/485 Select (JCOMPWR5, 6, 7)
Short the jumper pins according to the following settings to set
COM4 to RS-232/422/485/485 mode.
JCOMPWR5 JCOMPWR6/7
RS-232
RS-422
RS-485