Control Techniques SM-Encoder Output Plus, Руководство пользователя

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SM-Encoder Plus & SM-Encoder Output Plus User Guide
17
Issue: 4 www.controltechniques.com
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Index
5 Getting started
5.1 Installation
Encoder connections
In order to ensure correct operation there are a number of checks which should be
carried out:
•
Ensure the encoder is securely mounted to the motor as spurious operation can
result due to the encoder slipping whilst the motor is rotating.
• Ensure encoder connections to both the encoder and the Solutions Module
terminals are secured, intermittent connections can result in spurious operation or
the Solutions Module not detecting the feedback signals.
• Ensure screening recommendations as specified in Chapter 4.4 Wiring, Shield
connections on page 14 are followed to prevent noise being induced on the encoder
feedback signals. Noise induced on encoder feedback cables cannot only result in
spurious operation but in extreme cases can result in encoder failure and/or
damage to the Solutions Modules encoder input.
Encoder feedback and communications data is transmitted from an encoder as low
voltage analog or digital signals. Ensure that electrical noise from the drive or motor
does not adversely affect the encoder feedback. Ensure that the drive and motor are
connected as per the instructions given in the approriate drive manual, and that the
encoder feedback wiring and shielding recommendations are followed in section
4.3
Wiring, Shield connections on page 12.
The control circuits are isolated from the power circuits in the drive by basic insulation
only, as specified in IEC60664-1. The installer must ensure that the external control
circuits are insulated from human contact by at least one layer of insulation rated for use
at the AC supply voltage.
If the control circuits are to be connected to other circuits classified as Safety Extra Low
Voltage (SELV) (e.g. to a personal computer) an additional isolating barrier must be
included in order to maintain the SELV classification.
WARNING