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11.1.4 Temperature monitoring of the heat sink
The heat sink temperature of the power output stage is measured with a linear temperature sensor.
The temperature limit varies from device type to device type.
11.1.5 Monitoring of the motor
The ARS 2100 SE series servo drives have the following protective functions to monitor the motor and
the connected encoder:
Monitoring of the encoder: An error of the shaft encoder leads to the shut-down of the power output
stage. In the case of resolvers, for example the encoder signal is monitored. In the case of incremental
encoders the commutation signals are checked. Other “intelligent” encoders provide further means of
error detection.
Measurement and monitoring of the motor temperature: The ARS 2100 SE series servo drives have a
digital and analogue input for measuring and monitoring the motor temperature. The analogue signal
detection also supports non-linear sensors. The following temperature sensors can be selected:
At [X2A], [X2B] and [X6]: Input for PTCs, NTCs, normally closed contacts, normally open
contacts and analog sensors, type KTY.
11.1.6 I²t monitoring
The ARS 2100 SE servo drives comprise an I²t monitoring to limit the average power loss in the power
output stage and in the motor. Since the occurring power loss in the power electronics and in the
motor in the worst case increases square with the current, the squared current value is assumed as
the measure for the power loss.
11.1.7 Power monitoring for the brake chopper
Power monitoring for the internal brake resistor is implemented in the operating software.
When the power monitoring “I²t brake chopper” reaches 100% the power of the internal brake resistor
is switched back to the rated output power.
Product Manual „Servo drives ARS 2100 SE“
Version 5.0
