Specifications

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EPSON
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EPSON Advanced Printer Driver for TM series
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Reference Manual
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! When connecting to a serial cable, use the following wiring
Cable wiring which can be used
Printer side User side
D-sub25 Connector
Pin Number
Signal
name
Signal name D-sub9 Connector Pin
Number
8 (NC) DCD 1
3 RxD RxD 2
2 TxD TxD 3
20 DTR DTR 4
7 SG SG 5
6 DSR DSR 6
4 RTS RTS 7
5 CTS CTS 8
22 (NC) RI 9
Furthermore, there is one more wiring structure of the cable, which cannot be used.
Cable wiring which cannot be used
Printer side User side
D-sub25 Connector
Pin Number
Signal
name
Signal name D-sub9 Connector Pin
Number
8 (NC) DCD 1
3 RxD RxD 2
2 TxD TxD 3
20 DTR DTR 4
7 SG SG 5
6 DSR DSR 6
4 RTS RTS 7
5 CTS CTS 8
22 (NC) RI 9