Lenze 8200 Frequency inverters - Manual (Page 209)

Configuration
8200SHB0199 7-72
7.7.3.2 PTC input
Setting range 820X/821X: Option, see Accessories
Setting range 822X/824X:
Code Name Possible settings IMPORTANT
Lenze Choice Info
C119 ¤ Function PTC
822X/824X -0- -0- PTC input not active
-1- PTC input active
TRIP and IMP inhibit are set (OH3
message)
-2- PTC input active
Warning via relay (adjustable) Message not
visible in the
history buffer
(C161 ... C164)
Function Input for the connection of PTC resistors to DIN44081 and DIN44082. The motor temperature can
be detected and integrated in the drive monitoring.
This input can also be used for the connection of a thermostat (normally-close).
Activation 1.Connect the monitoring circuit of the motor to the provided terminals T1 and T2.
2.Parameter setting for the evaluation of the PTC signal:
If the PTC evalution detects an overtemperature, it can be evaluated in three ways:
- C119 = -0- PTC not active
- C119 = -1- TRIP
- C119 = -2- warning
Important - The controller can only evaluate a motor-PTC system.
- Several motor-PTC systems connected in parallel or in series are not allowed.
- If you connect several motors to an inverter, use thermistors (normally-close) to monitor the motor
temperature.
- For the evaluation, thermistors can be connected in series.
- The OH3 message is activated at approx. R  1.6 k Ω
. If, for a functionality test, the PTC input is
assigned to a variable resistor, the following occurs:
- R > 2 k
Ω
a message is set.
- R < 250
Ω
no message is set.
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