Com1 serial port – Symbol Technologies VRC 6940 User Manual
Page 100
D-3
Environmental and Technical Specifications
COM1 Serial Port
The COM1 Serial Port is located on the back panel of the VRC 6940.
lists the pin
descriptions.
Table D-3. COM1 Serial Port Descriptions
Pin
Name
Signal
Direction
1
GROUND
GND
IN
1
2
TRANSMIT DATA
TXD
OUT
1
3
RECEIVED DATA
RXD
IN
1
4
REQUEST TO SEND
RTS
OUT
1
5
CLEAR TO SEND
CTS
IN
1
6
DATA SET READY
DSR
IN
1
7
SIGNAL GROUND
GND
—
1
8
CARRIER DETECT
DCD
IN
1
9
Not used
10
Not used
11
REV CH
OUT
1
12-19
Not used
20
DATA TERMINAL READY
DTR
OUT
1
21
Not used
22
RING INDICATOR
RI
IN
1
23
Not used
24
Reserved
2
25
Reserved
2
1
RS-232 signal
2
Symbol internal test signals