4 D50 PLC User's Manual
System Installation Considerations
Environmental Considerations
The D50 PLC system should never be installed under the following environmental conditions:
1. Ambient temperature outside the range of 0 to 55°C (32 to 131°F).
2. Direct sunlight.
3. Humidity outside the range of 20% to 90%.
4. Altitudes greater than 10,000 ft. (3,000 m).
5. Corrosive or dusty air.
6. High voltage, high magnetics, or high electromagnetic waves.
7. Locations subject to direct impact greater than 10G or vibrations greater than 1G @ 57-2000
Hz.
Preventing PLC System Malfunctions
1. Use an isolation transformer and line filter on the incoming power to the PLC when in the
vicinity of equipment using or producing high current, high voltage, or large magnetic fields.
2. Separate the main PLC power line ground from all other power grounds. Always use triple-
grounding.
3. Do not exceed the current and power rating of the external 24 VDC provided by the D50
power supply.
4. Avoid system faults due to programming errors by reading and fully understanding this
system manual and the PLC instruction set.
5. Perform regular preventive maintenance on installed systems, checking devices and wiring for
potential breakdowns and failures.
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