TransAct Technologies ITHACA 80PLUS User Manual
Page 43
Appendix
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Pin
Signal Name
Signal Function
PC Host 9-pin Cross
Connect Pin #
1
Received line
signal detector
Not used
2
Serial receive
Input signal to receive
data from the host system
3 TX
3
Serial transmit
Output signal sending
data to the host system
2 RX
4
Data terminal ready Output signal to float
control the host
6 DSR
5
Ground
Logic ground
5 GND
6
Data set ready
Input signal to float
control printer
4 DTR
7
Request to send
Output signal to float
control the host
8 CTS
8
Clear to send
Not used
7 RTS
9
Ring indicator