1
7
6
5
4
3
2
20
1
7
6
5
4
3
2
20
RS-232C
or
25 pin
25 pin
1
7
6
5
4
3
2
20
1
7
6
5
4
3
2
20
RS-232C
25 pin
25 pin
7
6
5
4
3
2
8
7
6
5
4
3
2
20
RS-232C
25 pin
9 pin
Appendix A System Interface Description
Appendix A System Interface Description
Cables with bridges at printer side (4 to 5) for older PMs (lower than
1)
PM-40A4
) can also be used!
A-3
A-4
2 Transmission Protocols
- Version 2 - Connection full Duplex Transfer Mode
2.1
DTR - Ready/Busy
control the transmission of data from the host to prevent a buffer overflow.
(Supported RS-232C Protocols) - Full Duplex Local Connection
This protocol uses the following signal lines:
-
Pin
1 Protective Ground (PG)
-
2 Transmit Data (TXD)
-
3 Receive Data (RXD) (with internal
Pull-up
)
1)
-
5 Clear to Send (CTS) (with internal
Pull-up
)
1)
-
7 Signal Ground (SG)
-
20 Data Terminal Ready (DTR)
The
READY / BUSY DTR
protocol uses the DATA TERMINAL READY line to
control the transmission of data from the host to prevent a buffer overflow.
Note:
The signal lines TXD (pin 2) and CTS (pin 5) are only necessary if the
Device Status Report is required (see picture "Connection for
- Version 3 - PC Connection for full Duplex Transfer Mode
Unidirectional Transfer Mode").
-
Version 1 - Connection for Unidirectional Transfer Mode
The READY / BUSY DTR protocol uses the DATA TERMINAL READY line to
Note:
Bridge between 7 and 8 on PC side means alternative
RTS
to
CTS
.
Содержание PP 408
Страница 58: ...14073 Appendix A to G for Printer ...
