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2 Design
High-function General-purpose Inverter RX2 Series User’s Manual
2-3 Wiring
2
2-3-2 Arrangement and Function of Main Circuit Terminal Block
The table below shows the arrangement of the main circuit terminal block and description of each termi-
nal.
Precautions for Correct Use
• EMC filter is enabled at factory default setting.
• P-PD is short-circuited when shipped from the factory. If P-PD is not connected, power is not
supplied to the main circuit, which disables operation.
2-3-2 Arrangement and Function of Main Circuit Terminal Block
Main Circuit Terminal Block
Terminal
symbol
Terminal name Description
R,S,T
(L1,L2,L3)
Input terminal for main
power supply
Connect to the AC power supply.
U,V,W
(T1,T2,T3)
Inverter output terminal Connect to the 3-phase motor.
PD,P
(+1,+)
DC reactor connection ter-
minal
Remove the short bar between PD and P terminals, and connect
the optional reactor DCL for improving power factor.
P, R B
(+,RB)
Connection terminal for
external braking resistor
Connect the optional external braking resistor. For models
equipped with the braking resistor circuit, see 1-3-3 400V Class
Specifications on page 1-12. Models not equipped with the braking
resistor circuit do not have the RB terminal.
P, N
(+,-)
Connection terminal for
regenerative braking unit
Connect the optional regenerative braking unit BRD.
Inverter earth terminal
The earth terminal for the Inverter case. Please connect this termi-
nal to the ground.
Conduct class-D ground work for 200V class, and class-C ground
work for 400V class.
ELB MC
R/L1
S/L2
T/L3
R0
T0
U/T1
V/T2
W/T3
MM
3~
P
PD
RB
N
Internal EMC filter
Short bar or terminal
Short bar
3-phase AC motor
D-class grounding
(200V class)
C-class grounding
(400V class)
Main circuit
terminal area
Earth-leakage
breaker
Magnetic
contactor
3-phase
AC power
supply
J51 connector
Control circuit
power supply
Disable Enable
200 V class:
200-240 VAC
400V class:
380-500 VAC
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