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model 3000 DeviceNet Module Manual (DN311/DN311A)
Chapter 8 Installation and Wiring
8
Considering protection from noise, a covered metal cable duct or steel-made protection
tube is recommended. The recommended minimum separation distances between
parallel signal lines and power cables in using the above means of protection are shown
in the table below.
Source: Guideline for the Environment of Installing Microcomputer-applied
Instrumentation and Control Devices (by the [Japan Electric Measuring Instruments
Manufacturers' Association])
In case of using a cable duct, place a steel-made separator in a cable duct and separate
the power cables from the trunk cables as shown below.
Figure 8-1 Example of Cabling through a Duct
In installing cables in a pit, use a separator as used in cabling through a duct.
Figure 8-2 Example of Cable Installation in a Pit
Table 8-3 Recommended Minimum Separation Distances
(Installation in Covered Metal Ducts or Steel Protection Tubes) (In millimeters)
Cabling Method Covered Metal Duct or Steel Protection Tube
Total parallel distance
10 m or
less
25 m or
less
100 m or
less
200 m or
less
500 m or
less
501 m or
more
Power cable
150 V or less, 10 A or less 10 10 50 100 200 250
250 V or less, 50 A or less 10 50 150 200 250 250
400 V or less, 100 A or
less
50 100 200 250 250 250
500 V or less, 200 A or
less
100 200 250 250 250 250
Over the above 500 or more
Transmission cables
Power cables
(Instrumentation power
cable, solenoid valve,
operating signal line, etc.)
Metal duct
Separator
Signal cables Power cables
Separator (steel-made)
Grounding (Class D)
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