1 wiring, 2 shielding and grounding, 1 general guidelines – Lenze S94P01B2 User Manual
Page 14: Installation
S94P01B2
12
Installation
UL INSTALLATION INFORMATION
•
Suitable for use on a circuit capable of delivering not more than
200,000 rms symmetrical amperes, at the maximum voltage rating
marked on the drive.
•
Use Class 1 wiring with minimum of 75ºC copper wire only.
•
Shall be installed in a pollution degree 2 macro-environment.
3.1
Wiring
DANGER!
Hazard of electrical shock! Circuit potentials are up to 480 VAC above
earth ground. Avoid direct contact with the printed circuit board or
with circuit elements to prevent the risk of serious injury or fatality.
Disconnect incoming power and wait 60 seconds before servicing the
drive. Capacitors retain charge after power is removed.
WARNING!
Leakage current may exceed 3.5mA AC. Minimum size of the protective
earth conductor shall comply with local safety regulations for high
leakage current equipment.
STOP!
Under no circumstances should power and control wiring be bundled
together. Induced voltage can cause unpredictable behavior in any
electronic device, including motor controls.
Refer to section 4.1.1 for power wiring specifications.
3.2
Shielding and Grounding
3.2.1 General Guidelines
Lenze recommends the use of single-point grounding (SPG) for panel-mounted controls.
Serial grounding (a “daisy chain”) is not recommended. The SPG for all enclosures
must be tied to earth ground at the same point. The system ground and equipment
grounds for all panel-mounted enclosures must be individually connected to the SPG
for that panel using 14 AWG (2.5 mm
2
) or larger wire.
In order to minimize EMI, the chassis must be grounded to the mounting. Use 14 AWG
(2.5 mm
2
) or larger wire to join the enclosure to earth ground. A lock washer must
be installed between the enclosure and ground terminal. To ensure maximum contact
between the terminal and enclosure, remove paint in a minimum radius of 0.25 in (6
mm) around the screw hole of the enclosure.
Lenze recommends the use of the special PositionServo 940 drive cables provided by
Lenze. If you specify cables other than those provided by Lenze, please make certain
all cables are shielded and properly grounded.
It may be necessary to earth ground the shielded cable. Ground the shield at both the
drive end and at the motor end.
If the PositionServo 940 drive continues to pick up noise after grounding the shield, it
may be necessary to add an AC line filtering device and/or an output filter (between
drive and servo motor).