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18. COM1, COM2, COM3/5, and
COM4/6 Connector
1) COM1 & COM2
•
D-SUB 9pin Connector
•
CI signal of COM1 or COM2 and +5V power supply can be
switched in order to 5V power.
Connector Specifications
D-SUB9
Pin No.
Signal
Function
I/O
1
CD
Data Carrier Detect
I
2
RD
Receive Data
I
3
SD
Send Data
O
4
ER
Data Terminal Ready
O
5
SG
Signal Ground
—
6
DR
Data set Ready
I
7
RS
Request to Send
O
8
CS
Clear to Send
I
9
CI/+5V
Ring In5V
I/–
S2
1 2 3
S1
1 2 3
Main PWB
S1=COM1 : 1=CI
3=+5V
S2=COM2 : 1=CI
3=+5V
S1
1
2
3
S2
S1
S2
COM1
COM2
+5V
1
2
3
1
2
3
1
2
3
CI
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