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80 User's Guide
Connection with host:
Host 25S Printer 9P Host 9S Printer 9P
(PC or compatible) (PC or compatible)
DTR 20 ……….. 1 DSR DTR 4 ……….. 1 DSR
DSR 6 ……….. 6 DTR DSR 6 ……….. 6 DTR
TX 2 ……….. 2 RX TX 3 ……….. 2 RX
RX 3 ……….. 3 TX RX 2 ……….. 3 TX
CTS 5 ……….. 7 RTS CTS 8 ……….. 7 RTS
RTS 4 ……….. 8 CTR RTS 7 ……….. 8 CTS
GND 7 ……….. 5 GND GND 5 ……….. 5 GND
Alternatively you can just connect the 3 wires in the following way.
Host 25S Printer 9P Host 9S Printer 9P
(PC or compatible) (PC or compatible)
TX 2 ……….. 2 RX TX 3 ……….. 2 RX
RX 3 ……….. 3 TX RX 2 ……….. 3 TX
GND 7 ……….. 5 GND GND 5 ……….. 5 GND
pin 4 pin 4
pin 5 pin 6
pin 6 pin 7
pin 20 pin 8
The simplest way to connect to other hosts (not PC compatible) or terminals is:
Printer Terminal/Host
Pin 2- RxData ………… TxData
Pin 3- TxData ………… RxData
Pin 5- Ground ………… Ground
In general as long as the data quantity is not too large or you use Xon/Xoff as flow
control, there will be no flow control issues.