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COM2 RS-232 Serial Port Connector (D-Sub 9-pin Male): CN3
Pin #
1
DCD (Data Carrier Detect)
2
RXD (Receive Data)
3
TXD (Transmit Data)
4
DTR (Data Terminal Ready)
5
DCD (Data Carrier Detect)
Figure:
USB1 / USB2 Connector (4-pin Female): CN4
Pin #
1a
2a
3a
4a
Figure:
Assignment
Assignment
Vcc via Ploy-fuse
USBPO
USBP0 +
Signal ground
Pin #
6
DSR (Data Set Ready)
7
RTS (Request to Send)
8
9
5
1
9
6
Pin #
1b
2b
3b
4b
1
4
1
4
19
Installations
Assignment
CTS (Clear to Send)
RI (Ring Indicator)
Assignment
Vcc via Poly-fuse
USBP1
USBP1 +
Signal ground
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