Motion Control Engineering Motion 4000, Manual

Page: 41 / 459

Preparation
2-3
2
Motion 4000
Equipment Safety
• Provide equipment grounding in accordance with local code and NEC Article 250. Failure
to obtain a true earth ground may result in electrical shock. Improper grounding is the
most common cause of electrical component failure and noise-induced problems.
• Replace components only with main line power off. Damage to equipment or unexpected
operation of the elevator may occur if this precaution is not observed.
• Do not substitute or modify parts. MCE will not be responsible for modifications made in
the field unless they are approved in writing by MCE.
• Circuit boards believed to be defective must be sent to MCE for repair and testing. Field
repair may leave the board with undetected problems.
• Care should be taken when using test leads and jumpers to avoid shorting high voltage or
ground to low voltage microprocessor circuits.
• Do not allow dust, carbon, or metallic particles to accumulate on any part of the control.
• Avoid vibration, shock, high humidity, high ambient temperature, and caustic fumes.
Preparation
When choosing equipment location, consider:
• Logical arrangement, taking into consideration other equipment, electrical power, and
seismic zone requirements.
• Do not install equipment in hazardous or vibration prone locations.
• Locate the drive isolation transformer (if used) near the controller to reduce wire runs.
• Ambient temperature should remain within 32
°
to 104
°
Fahrenheit (0
°
to 40
°
Celsius).
Temperatures outside these guidelines may be tolerated, but will shorten equipment life.
Adequate ventilation is required. Air conditioning may be necessary.
• The air in the machine room should be free of excessive dust, moisture, or corrosive ele-
ments. A NEMA 4 or NEMA 12 enclosure can help meet these requirements if machine
room conditions are inadequate. If the machine room has open or unglazed windows or
other direct outside openings, place equipment cabinets far enough from them that severe
weather does not damage the equipment.
• Very high levels of radio frequency (RF) radiation from nearby sources should be avoided.
RFI may interfere with controller components, degrading elevator performance. Using
hand-held communication devices close to the controller may also cause interference.
Interference from permanently installed radio transmitting antennas is not common.
• Power line fluctuation should not be greater than ±10%.