Installation
7
3.2 General Wiring Guidelines
Dangerous voltages, currents, temperatures, and energy levels exist within this
unit, on certain accessible terminals, and at the servo motor. NEVER operate
the unit with its protective cover removed! Caution should be exercised when
installing and applying this product. Only qualified personnel should attempt
to install and/or operate this product. It is essential that proper electrical
practices, applicable electrical codes and the contents of this manual be followed
strictly.
Superior SLO-SYN controls and drives use modern solid-state digital electronics to provide the features
needed for advanced motion control applications. Although care has been taken to ensure proper operation
under a wide range of conditions, some user equipment may produce considerable electromagnetic
interference (EMI) which can cause inappropriate operation of the digital logic used in the control, drive,
or other computer-type equipment in the user’s system.
In general, any equipment that causes arcs or sparks or that switches voltage or current at high frequencies
can cause interference. In addition, ac utility lines are often “polluted” with electrical noise from sources
outside a user’s control (such as equipment in the factory next door). Some of the more common causes of
electrical interference are:
•
power from the utility ac line
•
relays, contactors, and solenoids
•
light dimmers
•
arc welders
•
motors and motor starters
•
induction heaters
•
radio controls or transmitters
•
switch-mode power supplies
•
computer-based equipment
•
high frequency lighting equipment
•
dc servo and stepper motors and drives
The following wiring practices should be used to reduce noise interference.
Solid grounding of the system is essential. Be sure that there is a solid connection to the ac system
protective earth ground (PE). Insure that there is a good electrical connection through the drive case to the
control system enclosure . A separate grounding strap may be required to properly ground the unit to the
control system enclosure. This strap should ideally be constructed using copper braid at least 0.5" in width.
Use a single-point grounding system for all related components of the system (a “hub and spokes” arrange-
ment). Keep the ground connection short and direct. Grounding through both a mechanical connection to
the control enclosure and through a grounding strap is optimal.
Warning
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