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Rockwell Automation Publication TLP-IN001A-EN-P - October 2019
Kinetix TLP Servo Motors with 046…235 mm Frame Size
Prevent Electrical Noise
Electromagnetic interference (EMI), commonly called electrical noise, can affect motor performance. Follow these guidelines to reduce the effects
of EMI:
• Isolate the power transformers or install line filters on all AC input power lines.
• Use shielded cables.
• Shield signal cables from power wiring.
• Do not route motor cables over the vent openings on servo drives.
• Ground all equipment by using a single-point parallel ground system that employs ground bus-bars or large straps.
• If necessary, use additional electrical-noise reduction techniques to reduce EMI in noisy environments.
See System Design for Control of Electrical Noise Reference Manual, publication
, for additional information on reducing EMI.
Install Cables
Correct cable routing and careful cable construction improve system electromagnetic compatibility (EMC).
Follow these guidelines to build and install the cables:
• Keep the wire lengths as short as possible.
• Route noise sensitive wiring (encoder, serial, and I/O) away from input power and motor power wiring.
• Separate cables by 0.3 m (1 ft) minimum for every 9 m (30 ft) of parallel run.
• Ground both ends of the encoder cable shield and twist the signal wire pairs to help prevent EMI from other equipment.
Motor Installation
Motor installation must comply with all local regulations and use of equipment and installation practices that promote safety and electromagnetic
compatibility:
• All motors include a mounting pilot for aligning the motor on a machine.
• Preferred fasteners are stainless steel.
ATTENTION:
Damage can occur to the motor bearings and the feedback device if sharp impact is applied to the shaft during installation of couplings and pulleys.
Damage to the feedback device can result from applying leverage to the motor mounting face when removing devices mounted on the motor shaft.
Do not strike the shaft, couplings, or pulleys with tools during installation or removal. Use a wheel puller, to apply pressure from the user end of the shaft, when
attempting to remove any device from the motor shaft.
ATTENTION:
High voltage can be present on the shield of a power cable, if the shield is not grounded. Verify that there is a connection to ground for any power
cable shield.
ATTENTION:
Unmounted motors, disconnected mechanical couplings, loose shaft keys, and disconnected cables are dangerous if power is applied. Identify
(tag-out) disassembled equipment and restrict access to (lock-out) the electrical power.
Before applying power to the motor, remove the shaft key and other mechanical couplings that could be thrown from the shaft.
ATTENTION:
Verify that cables are installed and restrained to prevent uneven tension or flexing at the connector. Provide support at 3 m (10 ft) intervals
throughout the cable run.
Excessive and uneven lateral force at the cable connector can result in the connector’s environmental seal opening and closing as the cable flexes.