TallyGenicom 2440, User Manual

Page: 101 / 150

B-1
B
Interfaces
Your printer offers by default the possibility of operating either via a parallel interface or
an USB interface. In addition, a serial interface (RS232C) or an Ethernet interface are
available as options. Interfaces may vary from unit to unit depending on which configu-
ration is purchased.
This appendix provides information you may need for wiring your own interface cables
or for programming computer-to-printer communications. Most users do not need the in-
formation in this appendix. To simply connect your printer to your computer, follow the
instructions in Chapter 2,
“Operating the printer” , section “Connecting the interface cable” .
Parallel interface
This parallel interface can operate in the following two modes:
•
Unidirectional (forward channel) mode or compatible mode: This printer sup-
ports a conventional Centronics interface.
•
Bidirectional (forward/reverse channel) mode or nibble mode: This printer sup-
ports a bidirectional communication per Nibble mode of the IEEE 1284 Standard.
The cable connector at the printer side should be a shielded, Amphenol DDK57FE-
30360 or equivalent.
The connector pin assignments are given in the following tables by modes. In the tables:
•
“Input” denotes a signal from the computer to the printer.
•
“Output” denotes a signal from the printer to the computer.
•
The standard signal levels are 0.0 to +0.4 V (low), and +2.4 to +5.0 V (high).