Lenze 8400 StateLine - Manual (Page 242)

5 Motor control (MCTRL)
5.12 Monitoring
242
Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14
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5.12.4 Motor temperature monitoring (PTC)
For detecting and monitoring of the motor temperature, a PTC thermistor (DIN 44081/DIN 44082)
or a thermal contact (NC contact) can be connected to the terminals X106/T1 and X106/T2.
• If 1.6 kΩ < R < 4 kΩ at the terminals X106/T1 and X106/T2, the monitoring will respond, see
functional test below.
• If the monitoring responds:
• The error response set in C00585 is activated (Lenze setting: "Fault").
• The " oH3: Motor temperature (X106) triggered " error message is entered into the Logbook.
• The bMctrlMotorPtc status output of the LS_DeviceMonitor system block is set to TRUE.
• A setting of C00585 = "0: No Reaction" deactivates the monitoring.

Tip!
We recommend to always activate the PTC input when using motors which are equipped
with PTC thermistors or thermostats. This prevents the motor from being destroyed by
overheating.
Functional test
Connect a fixed resistor to the PTC input:
• R > 4 kΩ : Fault message must be activated.
• R < 1 kΩ : Fault message must not be activated.

Stop!
• The controller can only evaluate one PTC thermistor!
Do not connect several PTC thermistors in series or parallel.
• If several motors are operated on one controller, use thermal contacts (NC contacts)
connected in series.
• To achieve full motor protection, an additional temperature monitoring with separate
evaluation must be installed.

Note!
• In the Lenze setting ( C00585 = "1: Fault"), motor temperature monitoring is activated!
• There is a wire jumper between the terminals X106/T1 and X106/T2 by default.
• Lenze three-phase AC motors are provided with a thermal contact on delivery.