Quick Installation Guide
EBM-QM87U Quick Installation Guide
11
2.3.3
Multi-function select (SW1)
ON
OFF
1
AT SEL
ATX SEL
2
CF Slave
CF Master
3
Touch off
Touch on
4
NC
NC
5 BKLT Negative BKLT Positive
6
GPIO56:L
GPIO56:H
2.3.4
Serial port 1/ 2
– RS485 mode select (SW2)
* Default
In Serial Port 1 mode
ON
OFF
1
Auto Direction
*
RTS# Control
2
485TXP external
biasing resistor
OPEN
*
3
485TXN external
biasing resistor
OPEN
*
In Serial Port 2 mode
ON
OFF
4
Auto Direction
*
RTS# Control
5
485TXP external
biasing resistor
OPEN
*
6
485TXN external
biasing resistor
OPEN
*