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20 UMT-7211
User
Manual
2.6.3
COM3 RS-232 Port (J3)
Pin
Signal Name
Pin
Signal Name
1
DCD, Data carrier detect
2
RXD, Receive data
3
TXD, Transmit data
4
Data terminal ready
5
Ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9
RI, Ring indicator
10
Not Used
2.6.4
Backlight Connector (J22)
Pin
Signal Name
Pin
Signal Name
1 +12V 5
Backlight
Enable
2 +12V 6
Brightness
Control
3 Ground 7
+3.3V
4 Ground
2
1
9
10
1
7