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Kollmorgen S7240

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7 Electrical installation
7.1 Important notes
WARNING
There is a danger of electrical arcing when disconnecting connectors,
because capacitors can still have dangerous voltages present up to eight
minutes after switching off the supply power.
Risk of burns and blinding. The contacts become damaged.
Never undo any electrical connections to the servo amplifier while it is
live. Wait at least eight minutes after disconnecting the installations from
the main supply power before touching potentially live sections of the
equipment (e.g. contacts) or undoing any connections.
To be sure, measure the voltage in the DC Bus link and wait until it has
fallen below 60V. 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 p. 59.
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.30.
Hints for use of Residual-current circuit breakers (FI) ð p.51.
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 60.
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 cables with an adequate cross-section, as per
IEC 60204 (ð p.31) and use the requested cable material (ð p. 61) 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.
S701x2-S724x2 Instructions Manual 57
Kollmorgen 07/2014 Electrical installation

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