Acrosser AR-B9612 - Manual (Page 28)

AR-B9612 User’s Guide
3-9
3.2.5 Serial Port
(1) Serial Port Mode Select (J8)
Jumper pins allow you to set specific system parameters. Set
them by changing the pin location of jumper blocks. (A
jumper block is a small plastic-encased conductor [shorting plug]
that slips over the pins.) To change a jumper setting, remove
the jumper from its current location with your fingers or small
needle-nosed pliers. Place the jumper over the two pins
designated for the desired setting. Press the jumper even
onto the pins. Be careful not to bend the pins.
The J8 is used to choose the serial port mode, include of
RS-232, & RS-485.
RS-232
1
3
2
4
Factory preset
COM A=
RS-485
1
3
2
4
COM B=
RS-485
1
3
2
4
Figure 3-7 J8 : Serial Port Mode Select
(2) RS-485 Connector (J4 & J5)
J4 is used to connect the COM A port RS-485 selected, the I/O
port default address is 3F8H.
J5 is used to connect the COM B port RS-485 selected, the I/O
port default address is 2F8H.
1
2
3
4
1 NET+
2 NET-
3 GND
4 GND
Figure 3-8 J4 & J5 : COM A & COM B RS-485