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2. Wiring and Connection
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2-6-2 Dynamic brake unit wiring
The 11kW and larger servo drive unit does not have built-in dynamic brakes. Always install a dynamic
brake unit.
The 9kW and smaller servo drive unit has built-in dynamic brakes.
CAUTION
Correct wire the dynamic brake unit to the servo drive unit.
Do not use for applications other than emergencies (normal braking, etc.). The
internal resistor could heat up, and lead to fires or faults.
POINT
When you use a servomotor with a brake, please wire (between 1pin and 3pin)
of CN20 connector.
Control terminal
block
（M3）
U V W
CNU20S(AWG14)
a b
Name
NC
a
2
1
Pin
3
b 4
5
6
13
14
External
power supply
24VDC GND
Dynamic brake unit
(MDS-B-DBU-150)
Drive terminal
block
（M3）
Name
V
W
2
1
Pin
3
U
1
2
3
Motor with a brake
Twist wire
Brake connector
（CN20）
Name
24VDC
DBU
MBR
2
1
Pin
3
Servomotor
MDS-C1-V1-110/150