Custom Engineering KPM150H - Page 37

1
5
6 9
RS232 SERIAL INTERFACE
Female DB9 connector
J3
1 DCD
2 TX During transmission, takes the values “0” and “1” depending on data
3 RX During reception, takes the values “0” and “1” depending on data
4 DSR
5 GND
6 DTR When “1”, printer is power on
7 CTS
8 RTS When “1”, printer is ready to receive data
9 n.c.
NOTE:
Given the presence of the RS232 standard, logic value “0” corresponds to a voltage level of between +3Vdc and
+15Vdc and logic value “1” corresponds to a voltage level of between -3Vdc and -15Vdc.
NOTE: DEVICE > PC connection
The following pictures shows an example of connections between the printer and a personal computer a 9 pin
female RS232 serial connectors:
DEVICE PC
DCD
RXD
TXD
SIGNAL GND
DSR
CTS
DTR
RTS
DB9
1
2
3
4
5
6
7
8
9
DB9
1
2
3
4
5
6
7
8
9
DCD
TX
RX
GND
DTR
RTS
DSR
CTS
NOTE:
When use a serial cable, we recommend the installation of a ferrite core on the power supply cable.
3. INSTALLATION
User manual KPM150H-AERO 37