Fuji Electric Monitouch V9 Series Connection Manual page 32

Connection Method 3
Connecting the MJ1/MJ2 of the master to the MJ1/MJ2 ports of the slaves
Master
(= Local port 1)
CN1 MJ1/MJ2
MJ1/MJ2
(a) (b)
Communication between V9 units: RS-485 (2-wire system), maximum length = 500 m
PLC1
(a) Connection between master and PLC
Select the port for connection from among CN1, MJ1 and MJ2.
The communication settings and connection method are the same as those for 1 : 1 connection.
(b) Connection between master and terminal block
Choose the connecting port of the master between MJ1 and MJ2.
For the cable, use "V6-MLT" (3 m). Connect the terminals of this cable to a terminal block prepared by the customer.
(c) Connection between terminal block and slave
Choose the connecting port of the slave between MJ1 and MJ2.
Use the "V6-MLT" cable (3 m).
(d) Connection between terminal blocks
Use the RS-485 (2-wire system) connection. Use twisted-pair cables of 0.3 mm sq or greater.
(b), (c), (d) The maximum length of the wiring among the master and slave is 500 m.
Wiring diagrams
Master
MJ1/MJ2
FG
+
−
Terminating
resistance
SG
(ON)
(b)
Slave
(= Local port 2) (= Local port 3)
MJ1/MJ2 MJ1/MJ2
(c) (c)
*1
Terminal Terminal
block
(d)
*1 0.5 m recommended (1.0 m maximum)
*2 Use twisted-pair cables of 0.3 mm sq. or greater between terminal blocks.
(d)
Slave
MJ1/MJ2
Terminating
resistance
(OFF)
SG
−
FG FG
+
-
+ SG
Terminal block
installed by the
customer
1.3 Connection Methods
Slave
(= Local port 4)
MJ1/MJ2
(c)
*1
Terminal
block block
(e)
(e)
Slave
Slave
MJ1/MJ2
MJ1/MJ2
Terminating Terminating
resistance resistance
(ON)
(OFF)
SG SG
− −
FG
+ +
- -
+ SG + SG
Terminal block Terminal block
installed by the
installed by the
customer
customer
1-21
Slave
*1
*2
(c)