II Installation and commissioning
II.1 Important instructions
Check the conformance of the servo amplifier and the motor. Compare the rated voltage and
current of the equipment. Implement the wiring according to the wiring diagram in Chapter II.2.3
or II.2.4. For units with CONNECT modules, also refer to the connection diagram for the inter
-
face in the appropriate CONNECT operating manual.
Take care that, even under worst-case conditions, the maximum permissible rated voltage on
the terminals L1, L2, L3 or +DC, –DC is not exceeded by more than 10% (see EN 60204-1,
Sec. 4.3.1). Excessive voltage on these terminals can result in destruction of the ballast circuit
and the servo amplifier. Use the digifas™ servo amplifier only on a three-phase 400V mains
supply and only to drive a synchronous servomotor from the 6SM series.
Fuse protection of the AC mains supply and the 25V supply must be provided by the user.
An unnoticed failure of a supply phase can result in an overload and possible destruction of the
mains input rectifier. We therefore recommend the use of a power circuit-breaker with phase-
failure monitoring (see Chapter I.8.3) .
Make sure that the servo amplifier and motor are properly earthed.
Run power and control cables separately. Recommended distance is more than 20 cm to
improve compliance with the limits specified by the EMC regulations.
Install all power cables with an adequate cross-section according to EN 60204. A tabular
summary of the recommended cross-sections can be found in Chapter I.8.2 . Use a motor
choke box (3YL-06) and a 4x1mm² motor cable if your motor cable is longer than 25m (see
chapter I.11). If a motor power cable is used with integrated brake control leads, then the brake
control leads must be shielded separately. The shield must be connected at both ends (see
Chapter II.2.1 ff).
Loop the BTB contact into the safety circuit of the system. Only so can the monitoring of the
servo amplifier be ensured.
Carry out all shielding with large areas (low resistance), using metallised connector housings
where possible (see II.2.1 ff). Notes on connection methods can be found in Chapter II.2.6 .
Ensure an adequate supply of filtered cool air in the switchgear cabinet, fed from below.
Refer to Chapter I.8.1 .
If the ballast power exceeds 75W, you have to use forced cooling (digifas™ 7206, -BV-)
Alterations in the servo-amplifier settings by means of the operator software are permitted.
Any additional tampering with the equipment will invalidate the guarantee.
Chapter II Installation and commissioning Page II - 1
digifas
®
7200 series 03.98
Caution
Never remove the electrical connections of a servo amplifier which is live.
In some cases this can cause the destruction of the electronics. The residual charge in
the capacitors can still have a dangerous level up to 120 seconds after the supply
voltage has been switched off.
Measure the voltage in the intermediate circuit and wait until it has droppped below 40V.
Even when the motor is standing still, control and power terminals may still be live.
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