Mitsubishi Electric FR-D720 K Series Instruction Manual page 186

Communication operation and setting
(2) PU connector communication system configuration
Connection of a computer to the inverter (1:1 connection)
FR-PU07
RJ-45 connector 2)
Communication cable 1)
Combination of computer and multiple inverters (1:n connection)
interface/terminals
RS-232C
* The inverters may be affected by reflection depending on the transmission speed or transmission distance. If this reflection hinders communication, provide a
terminating resistor. If the PU connector is used to make a connection, use a distributor since a terminating resistor cannot be fitted. Connect the terminating
resistor to only the inverter remotest from the computer. (Terminating resistor: 100)
REMARKS
 Refer to the following when fabricating the cable on the user side.
Examples of products available on the market (as of February 2015)
Product
1) Communication cable
2) RJ-45 connector
 Do not use pins No. 2, 8 of the communication cable. (Refer to page 181.)
182
Computer
Inverter
PU
RS-485
connector
interface/terminals
Station 0
Computer
Inverter
connector
RS-485
Distributor
Communication cable 1)
Computer
RS-232C
Connector Station 1
Inverter
Maximum
cable
15m
connector
RS-232C RS-485
converter
Distributor
Communication cable 1)
Type
SGLPEV-T (Cat5e/300m)
24AWG 4P
5-554720-3
Station 0
Inverter
PU
RS-232C
connector
RJ-45
connector 2)
Communication cable 1)
Station 1
Inverter
PU PU
connector
RJ-45 connector 2)
Station 2
Inverter
PU PU
connector
RJ-45 connector 2)
Mitsubishi Cable Industries, Ltd.
Tyco Electronics
Station 0
Computer
Inverter
RS-232C
connector
Maximum
connector
cable
15m
RS-232C RS-485
converter
Communication cable 1)
Station n
(max. 32 inverters)
Inverter
PU
connector
Terminating resistor *
Station n
Inverter
PU
connector
Terminating resistor *
Manufacturer
PU
RJ-45
connector 2)