Electrical Connections; General Remarks; Powerlines; Protective Earth - Tecnotion TM3 Series Manual

4.4

Electrical connections

Before starting any activity on the wiring, make sure that the
mains are disconnected. Work carefully according the instructions
belonging to the applied servo controller. Be sure your machine
as a whole meets the requirements of all applicable electrical
standards, such as the EN 60204 standard.

4.4.1 General remarks

In general Tecnotion linear motor's electrical wiring is externally configured
with two cables:
■
a power cable
■
a temperature sensor cable
For wiring scheme please refer to chapter
19. If desired you can shorten these cables and provide them with
appropriate connectors.
Only the TM series power- and temperature sensor cables are designed for
use in a power chain. All others are not. Please refer to chapter
interface on page 19 for more information.

4.4.2 Powerlines

The three phases of the motor's power cable have to be connected to the
servo amplifier in such a way that the positive three phase directions of
©2015 Tecnotion BV - All rights reserved - The contents of this document are subject to change without prior notice.
3.4 Electrical interface on page
3.4 Electrical
the motor conform to the positive direction of the linear encoder. This
polarization has to be tested, it cannot be seen at first sight. Please refer to
chapter 4.4.4 Polarization test on page 34
Power cable adaption
The power cable can be adapted by the user to fit the servo drive. Except
for the TM –series all other motors require an extra flexible cable between
the coil and the servo drive.

4.4.3 Protective earth

Internally the motor's protective earth wire is galvanically connected to
the motor housing. This wire must be connected to the protective earth
connector of the servo amplifier.
Be sure that the earth shield of the cable is well connected – also through
the connectors – to the protective earth connector or the housing of the
amplifier. Most linear motors are propelled on the principle of pulse width
modulation. This involves large electrical impulses and causes a significant
risk of electromagnetic interference.
Provide the motor system with protective earth lines to the amplifier that
are as short as possible.
CH 4
for more information.
INSTALLATION
33