Epson Apex 20020 - Manual (Page 157)

Parallel Port Loop-back Connector Pin Assignments
Output signal name Pin no. Pin no. Input signal name
Strobe 1 — 13 Select
Data bit 0 2 — 15 Error
Auto feed 14 — 12 P.END (out of paper)
Init. printer 16 — 10 Acknowledge
Select input 17 — 11 Busy
Serial Port Loop-back Connector Pin Assignments
Output signal name Pin no. Pin no. Input signal name
Transmit data 3 — 2 Receive data
1 Data carrier detect
Data terminal ready 4 — 6 Data set ready
9 Ring indicator
Request to send 7 — 8 Clear to send
Specifications A-9