Preventing Electromagnetic Interferences; Installing The Drive Controller Integrated In The Motor; Mechanical Installation - BONFIGLIOLI DGM MPM Technical Manual

3.3.4

Preventing electromagnetic interferences

To ensure immunity to interference, be sure that control
lines run separately from grid and motor cables. Where
possible use shielded lines for analogue control circuits.
At the line end, the shielding should be fitted with great
care. The use of EMC cable screw connections is
recommended for this purpose. These are not part of the
scope of delivery.
Ensure that no parasitic currents (compensating currents
etc.) can flow via an analogue control cable's shielding.
Route the control lines as far away as possible from the
power lines. Under certain circumstances, separate power
ducts should be used.
If lines do cross, an angle of 90° should be observed as far
as possible.
Upstream switch elements, such as protector switches and
brake coils or circuit elements that are operated via the
outputs of the drive controller have to be interference-
suppressed.
3.4 Installing the drive controller
integrated in the motor
3.4.1

Mechanical installation

Mechanical installation of sizes A - C
DANGER!
Risk of death due to electrical shock!
Death or serious injury!
De-energise drive controller and secure it
against being restarted.
Proceed as follows to mechanically install the drive
controller:
1. Open the standard motor connection box.
2. Disconnect the wires from the connection terminals.
Memorise or write down the connection
sequence.
3. Remove the motor terminal block if necessary.
4. Remove the connection housing's retaining bolts and
take the housing off.
DAMAGE TO PROPERTY POSSIBLE
Be careful not to damage the seal.
Operating manual for DGM Modular | DOC02389740-0006 | 2021-07 | V1.70 EN
RC circuits are suitable as AC voltage protector switches,
while free-wheeling diodes or varistors are usually used as
DC voltage protector switches. These interference
suppression devices are attached directly to the protector
switch coils.
IMPORTANT INFORMATION
Where possible, the power for a mechanical brake
should be supplied in a separate cable.
Power connections between the drive controller and motor
should always be shielded or reinforced, and the shielding
must have large-scale grounding at both ends! The use of
EMC cable screw connections is recommended. These are
not part of the scope of delivery.
Wiring suitable for EMC must be ensured.
Fig. 11: Assembly sequence:
Connection box – adapter plate (sizes A - C)
INFORMATION
The standard adapter plate is a plate the underside of
which is not reworked; i.e. no holes have been produced
yet.
You can order individually modified adapter plates from
Bonfiglioli for selected motors.
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