8 Electrical Installation
8.1 Safety Instructions
Never undo any electrical connections to the servo amplifier while it is live. There is a
danger of electrical arcing with damage to contacts and serious personal injury. Wait at
least five minutes after disconnecting the servo amplifier from the main supply power before
touching potentially live sections of the equipment (e.g. contacts) or undoing any
connections.
Capacitors can still have dangerous voltages present up to five minutes after switching off
the supply power. To be sure, measure the voltage in the DC Bus link and wait until it has
fallen below 40V.
Control and power connections can still be live, even if the motor is not rotating.
Wrong mains voltage, unsuitable motor or wrong wiring will damage the amplifier.
Check the combination of servo amplifier and motor. Compare the rated voltage and current
of the units. Implement the wiring according to the connection diagram on page 41.
Make sure that the maximum permissible rated voltage at the terminals L1, L2, L3 or +DC,
–DC is not exceeded by more than 10% even in the most unfavorable circumstances (see
IEC 60204-1).
Excessively high external fusing will endanger cables and devices. The fusing of the AC
supply input and 24V supply must be installed by the user, best values are given on p.24.
Hints for use of Residual-current circuit breakers (FI) ð p.34.
Correct wiring is the basis for reliable functioning of the servo system.
Route power and control cables separately. We recommend a distance of at least 200mm.
This improves the interference immunity. If a motor power cable is used that includes cores
for brake control, the brake control cores must be separately shielded. Ground the shielding
at both ends. Ground all shielding with large areas (low impedance), with metalized
connector housings or shield connection clamps wherever possible. Notes on connection
techniques can be found on page 42.
Feedback lines may not be extended, since thereby the shielding would be interrupted and
the signal processing could be disturbed. Lines between amplifiers and external brake
resistor must be shielded. Install all power cables with an adequate cross-section, as per
IEC 60204 (ð p.25) and use the requested cable material (ð p. 42) to reach max. cable
length.
The servo amplifier's status must be monitored by the PLC to acknowledge critical
situations. Wire the BTB/RTO contact in series into the emergency stop circuit of the
installation. The emergency stop circuit must operate the supply contactor.
It is permissible to use the setup software to alter the settings of the servo amplifier. Any
other alterations will invalidate the warranty.
SERVOSTAR
®
601...620 Instructions Manual 39
Kollmorgen
07/2010 Electrical Installation
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