Omron SYSDRIVE 3G3JV User Manual page 44

Design
H Wiring on the Output Side of the Main Circuit
D Connecting the Terminal Block to the Load
Connect output terminals U/T1, V/T2, and W/T3 to motor lead wires U, V, and W.
Check that the motor rotates forward with the forward command. Switch over any two of the output ter-
minals to each other and reconnect if the motor rotates in reverse with the forward command.
D Never Connect a Power Supply to Output Terminals
Never connect a power supply to output terminals U/T1, V/T2, or W/T3.
If voltage is applied to the output terminals, the internal circuit of the Inverter will be damaged.
D Never Short or Ground Output Terminals
If the output terminals are touched with bare hands or the output wires come into contact with the
Inverter casing, an electric shock or grounding will occur. This is extremely hazardous.
Also, be careful not to short the output wires.
D Do not Use a Phase Advancing Capacitor or Noise Filter
Never connect a phase advance capacitor or LC/RC Noise Filter to the output circuit.
Doing so will result in damage to the Inverter or cause other parts to burn.
D Do not Use an Electromagnetic Switch of Magnetic Contactor
Do not connect an electromagnetic switch of magnetic contactor to the output circuit.
If a load is connected to the Inverter during running, an inrush current will actuate the overcurrent pro-
tective circuit in the Inverter.
D Installing a Thermal Relay
The Inverter has an electronic thermal protection function to protect the motor from overheating. If, how-
ever, more than one motor is operated with one inverter or a multi-polar motor is used, always install a
thermal relay (THR) between the Inverter and the motor and set n33 to 2 (no thermal protection).
In this case, program the sequence so that the magnetic contactor on the input side of the main circuit is
turned off by the contact of the thermal relay.
D Installing a Noise Filter on the Output Side
Connect a Noise Filter to the output side of the Inverter to reduce radio noise and induction noise.
Power
supply
3G3JV
SYSDRIVE
Signal line
Controller
3G3IV-PLF
Noise
Filter
Induction noise Radio noise
AM radio
Chapter 2
2-19