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2 Wiring and Connection
MITSUBISHI CNC
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
For MDS-D2 : Connect a 3-phase 200VAC (50Hz) or 200 to 230VAC (60Hz) power supply.
For MDS-DH2 : Connect a 3-phase 380V to 440VAC (50Hz) / 380V to 480VAC (60Hz) power
supply.
L11, L21
Control circuit
power supply
Control circuit power supply input terminal
For MDS-D2 : Connect a single-phase 200VAC (50Hz) or 200 to 230VAC (60Hz) power
supply.
For MDS-DH2 : Connect a single-phase 380V to 440VAC (50Hz) / 380V to 480VAC (60Hz)
power supply.
MC1, MC2 Contactor control Contactor control terminal
U, V, W
Motor output
(Single-axis unit)
Servo/spindle motor power output terminal
The servo/spindle motor power terminal (U, V, W) is connected.
LU, LV, LW
MU, MV, MW
Motor output
(Triple-axis unit)
Servo motor power output terminal (L-axis/M-axis)
The servo/spindle motor power terminal (U, V, W) is connected.
LU, LV, LW
MU, MV, MW
SU, SV, SW
Motor output
(Triple-axis unit)
Servo motor power output terminal (L-axis/M-axis/S-axis))
The servo/spindle motor power terminal (U, V, W) is connected.
Protective
grounding (PE)
Grounding terminal
The servo motor/spindle motor grounding terminal is connected and grounded.
CAUTION
1. Always use one AC reactor per power supply unit. Failure to observe this lead to unit damage.
2. When sharing a circuit protector for several power supply 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.
3. Be sure to use the circuit protector of proper capacity for each power supply unit.