User manual

Instructions
ERC-1005 - 17 -
RS-232/RS-422/RS-485 mode selection for COM1 (motherboard)
Mode Selection
Pin
Setting
RS-232
(Default)
RS-422 RS-485
JP3 1-2 5-6 3-4
JP4 1-3, 2-4 3-5, 4-6 3-5, 4-6
JP3/JP4/JP5
JP5 1-3, 2-4 3-5, 4-6 3-5, 4-6
RS-232/RS-422/RS-485 mode selection for COM2 (motherboard)
Mode Selection
Pin
Setting
RS-232
(Default)
RS-422 RS-485
JP8 1-2 5-6 3-4
JP9 1-3, 2-4 3-5, 4-6 3-5, 4-6
JP8/JP9/JP10
JP10 1-3, 2-4 3-5, 4-6 3-5, 4-6
Signal Name
Pin
RS-232 RS-422 RS-485
1 NC TX- Data-
2 RXD TX+ Data+
3 TXD RX+ NC
4 NC RX- NC
5 GND GND GND
6 NC NC NC
7 NC NC NC
8 NC NC NC
COM3/COM4/COM5
9 NC NC NC
Note: the data transmission direction is controlled automatically under RS-485
mode.