Hardware reference
HARDWARE REFERENCE MANUAL
71
Revi
si
on 3.0
Serial connector
fig. 22
The serial connector allows for three communication standards:
•
RS232.
•
RS422.
•
RS485.
/i
TERM ON/OFF Switch
Sets the termination on/off of the RS422 / 485 serial connection.
The setting of the TERM ON/OFF switch depends on the
communication standard of the serial connection and the position of
the TJ1-MC__ in the network:
/i
9
8
7
6
5
4
3
2
1
Pin
Communication
Connection
1
RS422/RS485
/Tx
2
RS232
Tx
3
RS232
Rx
4
N/C
N/C
5
N/C
N/C
6
RS422/RS485
/Rx
7
RS422/RS485
Tx
8
RS422/RS485
Rx
9
RS232
0 V
Communication
standard
Position of the TJ1-
MC__
Setting of the TERM ON/OFF
switch
RS422 or RS485
First or last
Left (on)
RS422 or RS485
Not the first and not the
last
Right (off)
I51E-EN-03.book Seite 71 Donnerstag, 28. Juni 2007 1:05 13