Digital Servo Controllers
DSV 130 / DSV 132 / DSV 133
Operating Manual Rev. 1.8 www.engelantriebe.de Page 7
3.2 Safety installations
The DSV is equipped with substantial sensor technology to protect controller, power stage, motor and communication
interfaces. All errors cause a shutdown of the power stage. They are reported by a blinking code of the red status LED.
The power stage can not be switched on again before the source of fault is removed and the error is released using the
enable input.
3.2.1 Power stage protection
The power stage is protected by the following safety installations:
The over-current- respectively short-circuit-protection detects short circuits between the motorwindings as well
as between the motorwindings and the voltage supply.
The over-voltage-protection raises an error as soon as the dc-link voltage exceeds its maximum value.
The temperature of the power stage heat sink is measured, when the value exceeds 85°C, the power stage is
switched off.
3.2.2 Motor protection
The plausibility of the resolver signal is evaluated. Invalid signal combinations lead to switch-off of the power
stage.
Cable break detection when using a tacho.
The DSV is equipped with an input for monitoring the motor temperature. Normally closed thermal contacts or
PTC resistors can be used as sensors. The analogue nature of the input also allows the use of a linear temperature
probe, enabling individual adjustments of the threshold.
The I²t - surveillance protects motor and power stage against thermal overload, by limiting the output current to the
rated value after the maximum overload time has elapsed.
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