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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 supply +5V power.
Connector Specifications*
D-SUB9
Pin No.
Signal
1
CD
Data Carrier Detect
2
RD
Receive Data
3
SD
Send Data
4
ER
Data Terminal Ready
5
SG
Signal Ground
6
DR
Data set Ready
7
RS
Request to Send
8
CS
Clear to Send
9
CI/+5V
Ring Indicate/+5V
Function
I/O
I
I
O
O
—
I
O
I
I/–
Main PWB
S2 = COM1:
1 = +5V
3 = CI
S1 = COM2:
1 = +5V
3 = CI
COM2
+5V
COM1
CI
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