146
TX/CX 4000
A.2 Parallel Port Specifications
The TX/CX 4000 uses standard 36-pin/25-pin Centronics printer cables for
connection to a parallel printer and to connect a parallel PC/LAN printer
server port.
The 25-pin connector on the TX/CX 4000 has the pin assignments shown
in
Table A-3
.
Table A-3. Pin Assignments for the 25-Pin Parallel Connector on the
TX/CX 4000.
Pin Number
Direction
Name
1
Output
nStrobe
2-9
Output
Data 1 - Data 8
10
Input
nAck
11
Input
Busy
12
Input
PError
13
Input
Select
14
Output
nAutoFd (held high for future
use only)
15
Input
nFault
16
Output
nInit (pulled high by 1 K ohm
resistor)
17
Output
nSelectIn (held low)
18-25
Signal Ground
Shell
Chassis Ground