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RS-232 Serial Interface
Printer connector: DB-9pin female RS-232 connector.
Printer EasyCoder PC4 Host
Signal DB-9 Signal DB-9 DB-25 Signal
1 +5V 500 mA
1
1
RXD 2 TXD 2 3 RXD
TXD 3 RXD 3 2 TXD
DTR 4 – 4 20 DTR
GND 5 GND 5 7 GND
DSR 6 RDY 6 6 DSR
RTS 7 – 7 4 RTS
CTS 8 RDY 8 5 CTS
9 – 9
1
/.e combined load on the external +5V on both the parallel and the
serial port must not exceed a total of 500 mA.