Pin
Name
Direction
Description
of Signal
6
DSR
Input
This signal indicates whether the system can receive
data or not.
DSR = “0" indicates that the system can receive
data; otherwise, DSR = ”1"
If the DTR / DTS control has been selected, the
printer only transmits when DSR = “0" (except when
it transmits data in reply to GS ENQ ).
7
SG
-
Signal Ground
20
DTR
Output
This signal indicates whether the system can receive
data or not.
If the DTR / DTS control has been switched on,
DTR = “0" indicates that the printer can receive data;
otherwise, DTR = ”1".
DTR = “1" is switched in the following cases:
during switch-on norming;
during the self-test printing;
when the reception buffer is full.
If the XON / XOFF control is switched on, DTR is
always ”0", except in the following cases:
during switch-on norming;
during the self-test printing;
when a device error has been recognized.
Connecting Cable
A standard cable for connecting printers to the serial interface is used to connect the
ND69 to a PC or PC-compatible unit (e.g. BEETLE).
In the case of the connection to a BEETLE /60 with voltage-supplied COM interface, your
local branch office can supply the appropriate cable. Gender-changers must not be used.
At the printer end, this cable has a 25-pin D-sub connector, and at the systems end it has
a 9-pin D-sub connector. The following illustration shows the connector point allocation
and connection of the cable.
Appendix
Interfaces
GB - 89
