Motor Temperature Monitoring (Ptc) - Lenze 8400 StateLine C Reference Manual

8400 StateLine C | Reference manual
Motor control (MCTRL)
Monitoring
5.12.3

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.

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
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.
 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
– The "OH3: Motor temperature (X106)
Logbook.
– The bMctrlMotorPtc status output of the
TRUE.
 A setting of

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.
236
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(C00585
C00585
C00585 = "0: No Reaction" deactivates the monitoring.
L
= "1: Fault"), motor temperature monitoring is
is activated (Lenze setting: "Fault").
tripped" error message is entered into the
LS_DeviceMonitor
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
system block is set to