Thank you for selecting ORIENTAL MOTOR products.
To ensure correct operations, please read these instructions
carefully before using this motor.
INSTRUCTIONS
Electromagnetic Brake Motors
Single Phase 115V, 60Hz 4RK25GN-AM-115, 5RK40GN-AM-115
Single Phase 220/240V, 50Hz 4RK25GN-CME, 5RK40GN-CME
These Electromagnetic Brake Motors are reversible motors with a built-in de-energized electromagnetic brake [Fail-Safe Brake].
These motors are designed for 115V, 60Hz or 220/240V, 50Hz power sources.
■Features
1. Employing a de-energized, electromagnetic brake, the brake is
activated upon power shut off. The motor stops immediately and
holds the load firmly.
2. Sufficient holding torque is obtained regardless to the motor speed or
the power source frequency.
[Holding brake torque: 4RK25 Type 13 oz-in(9.8N-cm), 5RK40
Type 20 oz-in(14.7N-cm)]
3. The overrun at motor shaft is approximately 2〜3 rotations.
(With no-load and motor power shut off simultaneously.)
■Connecting Diagrams
●Protection of the relay contacts
The motor switch (SW2) and the electromagnetic brake switch (SW3) emit sparks
when turned on and off. In order to protect the relay contacts.
CR circuit ( ) must be connected.
Co=0.1〜0.2μF 250WV:4RK25GN-AM-115,
5RK40GN-AM-115
500WV:4RK25GN-CME,
5RK40GN-CME
Ro=5〜200Ω, 1/4W minimum
●Switch Specifications
No. of switches
SW1
SW2
SW3
SW4
Switch specifications
Single Phase 115V
AC125V 3A
Minimum
Single Phase 220/240V
AC250V 1.5A
Minimum
Note
Move together
■Timing Chart
■Operations
●Run/Stop
1. Motor will rotate when SW2 and SW3 are switched simultaneously to
RUN (short circuit) switching SW4 to OFF (open).
2. When SW2 and SW3 are switched simultaneously to STOP (open),
the motor stops immediately by electromagnetic brake and holds the
load.
3. To rotate the motor shaft by hand during the motor stops, switch
SW4 to ON (short circuit). The electromagnetic brake is released
and the motor shaft can be rotate easily by hand.
(Always switch SW4 to OFF (open) when running and stopping the
motor. SW4 is not necessary when such a operation is not needed.)
●Direction of Rotation
To rotate the motor in a clockwise (CW) direction, switch SW1 to CW.
To rotate it in a counter-clockwise (CCW) direction, switch SW1 to
CCW.
The diagram shows the direction of rotation of the motor shaft as
viewed from the motor shaft end.
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