Omron EJ1 User Manual page 147

Programless Communications
MELSEC-Q/QnA/QnAS-series PLC
122
• RS-232C
RS-232C
Pin
Signal
No.
1 ( ) CD
2 (3) RD
3 (2) SD
4 (20) DTR
5 (7) SG
6 (6) DSR
7 (4) RS
8 (5) CS
Note QnA pin numbers are given
in parentheses.
• RS-422
MELSEC-Q/QnA/QnAS-series PLC
RS-422
Signal Signal
SDA SDA
SDB+ SDB
RDA RDA
R
RDB+ RDB
FG FG
• Refer to the user's manual if using a Communications Module for the
QnA/QnAS Series.
Shield
Shield
RDA( )
Section 5-1
EJ1N-HFU@-NFLK
B1
A1
B2
A2
B3
A3
B4
A4
B5
A5
B6
A6
B7
SD
A7
B8
RS-232C
RD
A8
B9
SG
A9
Turn ON pin 8 of SW2
to set RS-232C.
EJ1N-HFU@-NFL2
B1
A1
B2
A2
B3
A3
B4
A4
B5
A5
B6
A6
RDB(+)
B7
SDB(+)
A7
B8 RS-422
A8
SDA( )
B9
R
A9