3 connector and jumper setting table, Ar-b8172 user manual, 6 cn3 (reserved) – Acrosser AR-B8172 User Manual
Page 12
AR-B8172 User Manual
2.3 Connector and Jumper Setting Table
2.1 LED1/LED2 (On-board)
On-board Power/IDE (CF) status LED.
2.2 LED3/LED4
Power/IDE (CF) status LED external 2.54mm
1×2PIN connector.
FUNCTION
LED1
( Green)
POWER LED
LED2
(Yellow)
IDE/CF LED
FUNCTION
LED4
( POWER LED)
PIN1 : VCC+
PIN2 : LED Signal
LED3
( IDE/CF LED)
PIN1 : VCC+
PIN2 : LED Signal
2.3 JP1
COM2 RS-232/42/485 selection and RS-485
termination resistor.
1.4 COM2
COM2 RS-232 2.54mm 2×5PIN Connector
JUMPE
UNCT
R F
ION
1-2 (de
RS232
fault)
3-4
RS422
5-6
RS485
7-8
120Ω
TERMIN
ENABL
ATION
E
PIN
SIGNAL PIN SIGNAL
1
DCD
2
DSR
3
RXD
4
RTS
5
TXD
6
CTS
7
DTR
8
RI
9
GND
10
N.C
2.5 CN7
RS422/485 connector (signal from
COM2).
NOTE1
2.6 CN3
(reserved)
PIN SIGNAL
RS485
RS422
1
485D+ 422TX+
2
485D- 422TX-
3
N.C 422RX+
4
N.C 422RX-
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