Epson C I - 4 0 4 User Manual page 124

1.2.2 XON / XOFF
This protocol requires all signal lines.
S Pin
1 Protective Ground (PG)
S
2 Transmit Data (TXD)
S
3 Receive Data (RXD)
S
4 Request to Send (RTS)
S
5 Clear to Send (CTS)
S
6 Data Set Ready (DSR)
S
7 Signal Ground (SG)
S
20 Data Terminal Ready (DTR)
Standard Connection
25 pin
For local connections RTS with CTS can be connected and likewise DTR with
DSR.
Appendix A System Interface Description
25 pin
A-5