Lenze E94P PositionServo with MVOB - Manual (Page 19)

S94H201E_13426446_EN L 17
Installation
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.
WARNING!
The PositionServo drive runs on phase-to-phase voltage. For the standard drive, either a
delta or wye transformer may be used for 3-phase input. However, for reinforced insulation
of user accessible I/O circuits, each phase voltage to ground must be less than or equal to
300VAC rms. This means that the power system must use center grounded wye secondary
configuration for 400/480VAC mains.
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 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 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 the drive and servo motor).