Acrosser AR-B1740 - Manual (Page 8)

AR-B1740 User's Manual 8
Serial Port Selection (RS232C/422/485)
RS-232C/422/485 Mode select (JRS2)
Type : JRS2: onboard 6-pin(2*3) header
1
3
5 2
4
6
CPU Type Selection
Type : J1: onboard 2-pin header
The CPU VccA (PLL supply voltage) could be selected by J1 in 1.5 V or 1.8
Note: Please make sure the correct setting of CPU VccA before up and running.
JRS2 Selection 1-2 3-4 5-6
RS-232C ON OFF OFF
RS-422 OFF ON OFF
RS-485 OFF OFF ON
default setting RS-232C
Mode J1
CPU VccA : 1.8V ON
CPU VccA : 1.5V OFF
default setting VccA : 1.8 V
1 2