Chapter 6 Wiring
6–6
6-3 Connection of power supply
CAUTION
1. Keep the power voltage and capacity within the controller's specification
range. Failure to observe this could lead to damage or faults.
2. For safety purposes, always install a no-fuse breaker or earth leakage
breaker, and shut off when an error occurs or before inspecting. A large
rush current flows when the power is turned ON. Refer to Chapter 6 and
select the no-fuse breaker or earth leakage breaker.
3. For safety purposes, install a magnetic switch that shuts off when an error
occurs. If the converter unit MDS-B-CV is provided in the system, use the
converter's magnetic switch control function. The magnetic switch can be
directly driven by the MDS-B-CV.
6-3-1 Example of connection for controlling magnetic switch (MC) with MDS-B-CV/CR
The following connection example applies when the power supply unit MDS-B-CV/CVE/CR is
provided in the system.
The magnetic switch can also be controlled by the MDS-B-SVJ2/SPJ2. Refer to the respective unit's
specification manual for details.
(1) When sharing a power supply unit and power supply
Power supply
unit
MDS-B-CV/CR
Ｌ＋
Ｌ−
Mitsubishi
CNC
I/F unit
MC
Ｌ１１
Ｌ１２
ＰＥ
Ｌ１
Ｌ２
Ｌ３
3-phase
200VAC
NFB
Intelligent
servomotor
External
emergency
stop
24VDC
Servo/spindle
drive unit
MDS-B-Vx/SP
Ｌ１１
Ｌ１２
ＭＣ１
ＰＥ
Ｌ１
Ｌ２
Ｌ３
Ｌ＋
Ｌ−
Ｌ１１
Ｌ１２
AC reactor B-AL
ＰＥ
Terminator
CAUTION
1. The MDS-B-CV is a power supply regenerative type converter; an AC
reactor is required in the power supply line.
Connect the intelligent servomotor main circuit power supply on the power
supply side of the AC reactor.
2. A no-fuse breaker and contactor cannot be shared when the rated current of
the no-fuse breaker exceeds 60A.
