Mechanical Installation - Emerson Control Techniques Epsilon Eb Series Reference Manual

Table of Contents

Epsilon Eb and EN Drives Reference Manual

Environmental Considerations

If the product will be subjected to atmospheric contaminants such as moisture, oils,

conductive dust, chemical contaminants and metallic particles, you must mount it vertically

in a metal NEMA type 12 enclosure.

If the ambient temperature inside the enclosure will exceed 40° C (104° F), you must consider

forced air cooling.

Note

It is necessary to maintain the drive surround air ambient temperature at 40° C (104° F)

[50°C (122ºF) with derating of 3% per degree above 40° C].

The amount of cooling depends on the size of the enclosure, the thermal transfer of the

enclosure to the ambient air and the amount of power being dissipated inside the enclosure.

Consult your enclosure manufacturer for assistance with determining cooling requirements.

Wiring Notes

•

To avoid problems associated with EMI (electromagnetic interference), you should route

high power lines (AC input power and motor power) away from low power lines (encoder

feedback, serial communications, etc.).

•

If a neutral wire (not the same as Earth Ground), is supplied from the building distribution

panel it should never be bonded with PE wire in the enclosure.

•

You should consider future troubleshooting and repair when installing all wiring. All

wiring should be either color coded and/or tagged with industrial wire tabs.

•

As a general rule, the minimum cable bend radius is ten times the cable outer diameter.

•

All wiring and cables, stationary and moving, must be protected from abrasion.

•

Ground wires should not be shared with other equipment.

•

Ensure that metal to metal contact is made between the enclosure ground lug and the metal

enclosure, not simply through the mounting bolt and threads.

•

All inductive coils must be suppressed with appropriate devices, such as diodes or

resistor/capacitor (RC) networks.