Mitsubishi Electric LE7-40GU, Instruction Manual, Page: 89 / 154

6 N:N NETWORK
6.1 System Configuration
87
6
6
N:N NETWORK
LE7-40GU can be operated as a local station for FX PLC N:N network communication.
Data monitoring and parameter writing from a master station FX PLC for up to seven local stations (LE7-40GU units) can be
carried out.
Precautions
• For 5 seconds after turning on the power of LE7-40GU, data from master station will not be accepted.
• Initial setting of LE7-40GU can not be done only with N:N Network.
• Simultaneous use of N:N Network and CC-Link communication is not possible.
6.1
System Configuration
6.2
Wiring
This section describes wiring.
Selection of cable
Use the following procedure to select cables.
Twisted pair cable
Use a shield twisted pair wire for connection with RS-485 communication equipment.
■
RS-485 cable specification
Connection equipment Communication
form Connection cable Tension controller
(Local station) Connectable
No. of units
Cable type name Optional equipment Main unit
FX5 PLC (master station) RS-485 User created  (Built-in to main unit) LE7-40GU Up to seven local stations (LE7-
40GU) from the master station
Item Specifications
Cable type Shielded cable
Pairs 2 p, 3 p
Conductor resistance (20  ) 88.0

/km or less
Insulation resistance 10000 M

-km or more
Withstand voltage 500 V DC1 minute
Capacitance (1 kHz) An average of 60 nF/km or less
Characteristic impedance (100 kHz) 110

10

LE7-40GU
N:N Network master station
(FX series PLC)
Connection Cable