Factory default 0
S2.22 Protection level
Setting range 0.0 ~ 10.0
Minimum unit 0.1
Factory default 2.0
S2.23 Thermal motor time constant
Setting range 0.0 ~ 400.0min
Minimum unit 0.1min
Factory default Depends on model
Used to protect the motor against overheat. There are two means of motor thermal pro‐
tections.
1. Protection with temperature sensor
A temperature sensor needs to be connected externally to the frequency convert‐
er. For this matter, 10 V and GND output pins are available on the external signal
connector of the frequency converter.
Fig.8-21: Protection with temperature sensor
● For a good resolution of temperature with continuous sensors (in gener‐
al: NTCs), the value of resistor R in the figure should be close to the
sensor resistance at the motor temperature limit.
● For switching sensors (in general: PTCs), the value of resistor R in the
figure should be close to the sensor resistance at high temperature.
● A protection threshold may be defined by users according to the sen‐
sor’s features. If AIV is defined for other purpose, the protection with
sensor could not be enabled ([S2.21] is always 0).
Bosch Rexroth AG
Parameter Settings
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
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