RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions
17
Publication RDB-IN002A-EN-P — October 2009
Attach Motor Cables
Follow these steps to attach the feedback and power/brake cables after the motor is
mounted.
1.
Form a drip loop in the cable before attaching it.
A drip loop creates a low spot in the cable. Gravity causes any liquid to flow
to the low spot and away from the connectors, thereby reducing the
potential for any liquid to enter the connector.
2.
If you use a cable with a SpeedTec plug, remove the O-ring from the motor
connector.
The O-ring on the motor connector dampens the effects of vibration at the
cable-to-motor connection. This creates a more secure connection for a
cable with a threaded plug. O-rings interior to the threaded and SpeedTec
plug provide complete environmental sealing for the cable.
ATTENTION
Make sure that cables are installed and restrained to prevent uneven tension or flexing at
the motor-to-cable connections.
Excessive and uneven lateral force at the motor connectors can result in the connector’s
environmental seal opening and closing as the cable flexes.
Failure to observe safety precautions could result in damage to the motor and its
components.
IMPORTANT
The 2090-XXNPMF-
xx
S
xx
power cable and the 2090-XXNFMF-S
xx
feedback cable require
an O-ring on the motor connector.
Power Connector
Feedback Connector
O-ring removed for
SpeedTec plug.
O-ring
Threaded Power Plug - Install O-ring
SpeedTec Feedback Plug - Remove O-ring
Align the flat surfaces
before securing connection.
