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QL Series User Guide
Communications Port
Signal
Pin# Name Type Description
1 RXD input Receive Data
2 TXD output Transmit Data
3 CTS input Clear To Send from host
4 RTS output Request To Send
set high when printer is ready
to accept a command or data
5 GND Ground
6NC No Connect
7 DSR input Data Set Ready
low to high transition turns
printer on, high to low transi-
tion turns printer off (if en-
abled)
8 DTR output Data Terminal Ready
set high when printer is on.
Set to battery voltage
for “S” versions( comptable
with Symbol™ PIM)
8
7
6
4
2
1
5
3
Figure 23 Communications Port (8 pin Circular DIN)