Allocation of Connectors and Description of Signals:
Pin
Name
Direction
Description
of Signal
1
+12 V
Output
supply voltage, max. 500 mA
2
RXD
Input
reception data
3
TXD
Output
transmission data
5
SG
-
signal ground
7
RTS
Input
This signal indicates whether the customer display
data can be received or not.
RTS = “0" indicates that the system can receive
data; otherwise, RTS = ”1".
The printer only transmits when RTS = “0".
8
CTS
Output
This signal is always switched at “0"; it is only at ”1"
during the switch-on norming and during the
self-test printing.
4,6, 9 NC
-
not connected
Appendix
Interfaces
GB - 91