Serial Interface to the System
The serial interface to the system is a V.24 (RS-232C) interface. It corresponds to the
COM interfaces on PCs.
Technical Data :
Data Transmission:
serial, full duplex
Synchronization:
synchronous
Handshaking:
DTR / DSR or XON / XOFF control
(can be selected by DIP switch 4)
Neither DTR / DSR nor XON/XOFF handshaking have effect
on the data transmission from the printer to the system. The
system must have a sufficiently large reception buffer
(e.g. 64 bytes) for reception data.
Baud Rate:
9600
Parity:
odd or none
automatic parity check: the type of parity check (odd or no
parity) is detected and set automatically when the signals
<0D>H, <80>H, <80>H, <80>H, <0D>H are received. To alter
the parity, these signals must be received as the first signals
after switching on the printer. If these signals are not detected,
the default value - odd parity - remains switched on. These
signals will not be printed.
Data Bits:
8
Stop Bit:
1
Signal Level:
MARK
= logical “1": -3V to
-15V
SPACE = logical ”0": +3V to
+15V
Connector Type:
25-pin D-sub connector
Allocation of Connectors and Description of Signals:
Pin
Name
Direction
Description
of Signal
1
FG
-
Frame Ground
2
TXD
Output
Transmission Data
3
RXD
Input
Reception Data
Interfaces
Appendix
GB - 88
