Lust SMARTDRIVE VF1205M - Motor Temperature Monitoring

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2.3.4 Motor temperature monitoring (PTC/ PT1 design)
A thermistor (PTC) or a thermal circuit breaker can be connected to the
terminals X4/ 51 + 52 for monitoring the motor coil. The input is potential-
free. There are 2 design versions available:
PTC design ð Thermistor evaluation according to
DIN 44081/44082 with short circuit detection
PT1 design ð For use of thermal circuit breaker (Klixon)
Specification:
PTC and PT1 design
Terminal voltage U
MAX
≤ 7.5 V
Current I
MAX
≤ 3 mA
Switching threshold R
ST
3600 Ω (nominal)
Reactivation value R
WST
< 1600 Ω
Only PTC design
Switching point with
short circuit R
K
< 50 Ω
Note: In the PTC or PT1 design, the device is supplied with an
installed resistance (100Ω on Cl. X4/51or 52). When
connecting a motor PTC or thermal circuit breaker, the
resistance should be removed in advance.
+
4
7
48
49
50
51
52
X5
X4
X3
X2
υ
υ
12
Terminal assignment:
(1) = Motor PTC
(2) = Thermal circuit breaker