Hakko Electronics Monitouch V9 Series Connection Manual page 23

RS-422/RS-485 connection
 Prepare a communication cable on your side. Twisted pairs of 0.3 mm sq. or above are recommended.
 The maximum length of wiring is 500 m.
* The maximum length varies depending on the connected device. Check the specifications for each device.
 Connect twisted pairs between +SD and SD, and between +RD and RD.
 If the PLC has a signal ground (SG) terminal, connect it.
 To use a terminal block for connection, use Hakko Electronics' optionally available "TC-D9".
 The DIP switch on the back of the V9 unit is used to set the terminating resistance.
For more information on DIP switches, refer to "1.2.6 DIP Switch (DIPSW) Settings" (page 1-7).
 Connect a shielded cable to either the V9 series or the connected device. The connection diagram shows the case where
the shielded cable is connected on the V9 series side. Connect the cable to the FG terminal on the backside of
MONITOUCH.
- RS-422 (4-wire system)
CN1
Name
Dsub 9 (Male)
FG
+RD
1
6
-RD
9
5
-SD
+SD
SG
- RS-485 (2-wire system)
CN1
Name
Dsub 9 (Male)
FG
+RD
1
6
-RD
9
5
-SD
+SD
SG
 If noise disturbs communications, connect a shielded cable to both the V9 series and the connected device.
- RS-422 (4-wire system)
CN1
Name
Dsub 9 (Male)
FG
+RD
1
6
-RD
9
5
-SD
+SD
SG
No.
Shielded
1
2
3
4
5
No.
Shielded
1
2
3
4
5
No.
Shielded
1
2
3
4
5
1.3 Connection Methods
RS-422 port of the
connected device
Send data (+)
Send data ()
Receive data ()
Receive data (+)
SG
RS-485 port of the
connected device
Send/receive
data (+)
Send/receive
data ()
SG
RS-422 port of the
connected device
FG
Send data (+)
Send data ()
Receive data ()
Receive data (+)
SG
1-11