Intelligent Motion Systems Modular LYNX System - Manual (Page 12)

1 - 12 Modular LYNX System 12.05.2003
S e c t i o n 4
P o w e r i n g t h e LY N X S y s t e m
S e c t i o n O v e r v i e w
This section covers the two basic power configurations for your LYNX System.
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Basic rules of wiring and shielding.
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LYNX Control Module with IMS Drivers.
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LYNX Control Module as Stand-alone or with Optional I/O Module.
W i r i n g a n d S h i e l d i n g
Noise is always present in a system that involves high power and small signal circuitry. Regardless of the
power configuration that you use in your system, there are some wiring and shielding rules that you should
follow to keep your noise-to-signal ratio as small as possible.
R u l e s o f W i r i n g
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Power Supply and Motor wiring should be shielded twisted pairs run separately from signal
carrying wires.
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A minimum of 1 twist per inch is recommended.
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Motors wiring should be shielded twisted pairs using 20-gauge wire, or 18 gauge or better for
distance greater than 5 feet.
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Power ground return should be as short as possible to established ground.
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Power Supply wiring should be shielded twisted pairs. Use 18 Gauge wire if load is less than 4
amps, or 16 gauge for more than 4 amps.
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Do not “Daisy-Chain” power wiring to system components.
R u l e s o f S h i e l d i n g
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The shield must be tied to zero-signal reference potential. In order for shielding to be effective
it is necessary for the signal to be earthed or grounded.
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Do not assume that earth ground is true earth ground. Depending on the distance to the main
power cabinet it may be necessary to sink a ground rod at a critical location.
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The shield must be connected so that shield currents drain to signal-earth connections.
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The number of separate shields required in a system is equal to the number of independent
signals being processed plus one for each power entrance.
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The shield should be tied to a single point to prevent ground loops.
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A second shield can be used over the primary shield, however the second shield is tied to
ground at both ends.
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WARNING! When using an unregulated supply, ensure that the
output voltage does not exceed the maximum driver input voltage
due to variations in line voltage! It is recommended that an input line
filter be used on power supply to limit voltage spikes to the system!