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2 Wiring and Connection
MITSUBISHI CNC
2 - 4
2-2 Main circuit terminal block/control circuit connector
2-2-1 Names and applications of main circuit terminal block signals and control circuit
connectors
The following table shows the details for each terminal block signal.
Name Signal name Description
L1 . L2 . L3
Main circuit power
supply
Main circuit power supply input terminal
Connect a 3-phase 200VAC (50Hz) or 200 to 230VAC (60Hz).
(N . P1 . P2) Not used Not used (Short between P1 and P2.)
P.C.D
Regenerative
resistor
Regenerative resistor connection terminal
When using the built-in regenerative resistor, short between P and D.
P to D is wired at shipment.
When using the external option regenerative resistor, disconnect the wire between P and
D, and wire the external option regenerative resistor between P and C.
L11 L21
Control circuit power
supply
Control circuit power supply input terminal
Connect a single-phase 200VAC (50Hz) or 200 to 230VAC (60Hz).
U . V . W Motor output
Servo/spindle motor power output terminal (3-phase AC output)
The servo/spindle motor power terminal (U, V, W) is connected.
Protective grounding
(PE)
Grounding terminal
The servomotor/spindle motor grounding terminal is connected and grounded.
1. When sharing a circuit protector for several drive units, of a short-circuit fault occurs in a small
capacity unit, the circuit protector could trip. This can be hazardous, so do not share the circuit
protector.
2. Be sure to use the circuit protector of proper capacity for each drive unit.
CAUTION