Figure 4-31 Sensitive Signal Circuit Clearance; Figure 4-32 Grounding The Drive, Motor Cable Shield And Filter; Figure 4-33 Grounding The Motor Cable Shield; Figure 4-34 Shielding Requirements Of Optional External Braking Resistor - Emerson unidrive sp User Manual

Safety Product Mechanical
Information Information Installation
Avoid placing sensitive signal circuits in a zone 300mm (12in) all around
the power module.

Figure 4-31 Sensitive signal circuit clearance

Ensure good EMC grounding.

Figure 4-32 Grounding the drive, motor cable shield and filter

Motor cable shield
(unbroken) electrically
connected to and held
in place by grounding
clamp.
88
Electrical Getting Basic
installation Started parameters
≥300mm
(12in)
Sensitive
signal
cable
Ensure direct
metal contact
at drive and
filter mounting
points (any
paint must be
removed).
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Running SMARTCARD
Optimization
the motor operation
Connect the shield of the motor cable to the ground terminal of the motor
frame using a link that is as short as possible and not exceeding 50mm
(2in) long. A full 360
the motor is beneficial.
It is unimportant for EMC purposes whether the motor cable contains an
internal (safety) ground core, or there is a separate external ground
conductor, or grounding is through the shield alone. An internal ground
core will carry a high noise current and therefore it must be terminated
as close as possible to the shield termination.

Figure 4-33 Grounding the motor cable shield

Unshielded wiring to the optional braking resistor(s) may be used,
provided the wiring does not run external to the enclosure. Ensure a
minimum spacing of 300mm (12in) from signal wiring and the AC supply
wiring to the external EMC filter. Otherwise this wiring must be shielded.
Figure 4-34 Shielding requirements of optional external braking
resistor
Optional external
braking resistor
Enclosure
+DC
Onboard Advanced Technical
PLC parameters Data
°
termination of the shield to the terminal housing of
Optional external
braking resistor
Enclosure
BR
OR
Unidrive SP User Guide
UL Listing
Diagnostics
Information
+DC BR
Issue Number: 13