Rs232 Serial Interface - Custom Audio Electronics VKP80II User Manual

3. INSTALLATION
5 5 1 1
9 9 6 6
1 DTR
2 TX
3 RX
4 n.c.
5 GND
J3
6 DTR
7 n.c.
8 RTS-O
9 +5VO
Note: Given the presence of the RS232 standard, logic value "0" corresponds to a voltage level of between +3 Vdc
and +15 Vdc and logic value "1" corresponds to a voltage level of between -3 Vdc and -15 Vdc.
Note: VKP80II > PC connection
The following pictures show an example of connections between the printer and a personal computer using a 9
pin female serial connector:
Note: When use a serial cable, we recommend the installation of a ferrite core on the serial cable.
20 VKP80II
User Manual

RS232 SERIAL INTERFACE

Female DB9 connector
When "1", printer is fed
(out)
During transmission, oscillates between "0" and "1" depending on data
(out)
During reception, oscillates between "0" and "1" depending on data
(in)
When "1", printer is fed
(out)
When "1", printer is ready to receive data
(out)
1
2
3
4
SIGNAL GND
5
6
7
8
9
DEVICE
DCD
1
RXD
2
TXD
3
4
5
DSR
6
7
CTS
8
9
PC