Operating manual
EZ, EZF, EZH, EZHD, EZHP synchronous servo motors / EZS, EZM synchronous servo
motors for screw drive
2
ID 442581_en.03
WE KEEP THINGS MOVING
07/2015
en
STÖBER ANTRIEBSTECHNIK GmbH & Co. KG
www.stober.com
GERMANY
Tel.: ++49 7231 582-0
2.1 Thermal winding protection
Synchronous servo motors are equipped with a thermistor
(PTC thermistor) in the standard configuration. You can
optionally select the KTY 84-130 as thermal winding
protection.
Make note of the information specified in the SMS-EZ catalog
and in the commissioning instructions for the servo inverter.
CAUTION!
Overheating of the motor!
If the thermal winding protection is not connected, the motor
may overheat as a result.
Possible consequences: destruction of the motor, danger of
fire.
X
You must also take precautions to ensure that no hazard
could occur after the thermal winding protection has
responded and the motor has then cooled off by
unintentional automatic switching on of the motor again!
Always connect to the thermal winding protection. If the
thermal winding protection is not connected, the warranty is
rendered void!
2.1.1 Thermal winding protection PTC
NOTICE
The PTC thermistor is a low-voltage sensor with max. 7.5
V
DC
connection voltage.
Higher voltages will cause the thermistor and motor winding
to be destroyed.
Always connect to the thermistor. If the drive controller has no
option for PTC evaluation, appropriate triggering devices
must be used for this purpose.
2.1.2 Thermal winding protection KTY
(optional)
Synchronous servo motors can optionally be equipped with a
temperature-dependent KTY 84-130 resistor as a
temperature sensor in a winding. On the KTY the resistance
changes in proportion to the temperature of the winding.
The continuous sensor current i
cont
= 2mA.
NOTICE
When making the KTY connection make certain the
polarity is correct! The installed KTY protects the
synchronous servo motors against overload only to a
limited degree. For this reason the I2t monitoring
parameter should be set to "WARNING".
X
Avoid currents >4mA in the KTY circuit, as these could
result in excessively high self-heating of the temperature
sensor and damage to its insulation and to the motor
winding.
CAUTION!
ESD/EGB safety information
This product contains components that can be damaged or
destroyed by electrostatic discharges.
X
Always avoid directly touching the pin contacts with your
fingers!
2.2 Encoder systems
Synchronous servo motors have an encoder system
integrated into the motor for motor commutation and
recording of position. Two-pole resolvers are possible as well
as absolute encoders in various versions.
Note the relevant motor connection diagram and the details
on the motor nameplate. The encoder systems have been set
to the respective servo inverters in the factory.
WARNING!
Changes to the factory settings of encoder systems may
result in uncontrolled startup or vibrating movements of
the motor shaft.
X
Therefore the factory settings must not be changed.
CAUTION!
ESD/EGB safety information
This product contains components that can be damaged or
destroyed by electrostatic discharges.
X
Always avoid directly touching the pin contacts with your
fingers!
