PSI Matrix PP 806 Benutzerhandbuch Seite 128

A 2 Parallel Centronics® Interface
A 1.1 Interface Characteristics - Connector Pin Assignment / Signal Definition
Control Signal from the Host. Printer reads data
STROBE **)
line (Data 1 to Data 8) when going low.
Data lines transfer the characters from the host to
Data 1 - 8
the printer. Data 8 = most significant bit.
Acknowledge - Negative going pulse from the
ACKN *)
printer indicates that the printer has received a
character and is ready for the next data transfer.
Control signal from the printer. A high level
BUSY indicates that the printer is unable to receive any
more data. **)
Paper Empty - Control signal from the printer. This
PE signal goes high when paper runs out, i.e. load
upper or lower tractor, paper jam.
Control signal from the printer. A high level
SELECT
indicates that the printer is ON-LINE and ready.
LG Logic Ground
--
not used
LG Logic Ground
CG Chassis Ground
VCC + 5 volt
SG Signal Ground
Control signal from the host. Does not reset the
*)
INIT
prin- ter.
Control signal from the printer. A low level
FAULT
indicates that the printer has been switched off, or
*)
the serial interface is active.
LG Logic Ground
--
not used
SELECT IN Compatible mode (low) 1284 nibble mode (high)
Signal Description
Return line
Pin No.
Pin No.
1 19
2 - 9 20 - 27
10 28
11 29
--
12
--
13
--
14
--
15
--
16
--
17
--
18
--
19 - 20
--
31
--
32
--
33
--
34 - 35
36 30
Appendix A-6
Direction
Input
Input
Output
Output
Output
Output
Input
Output
Input