Technical Data
50 BA8230
Motor thermistor connection PTC-MOTOR-TEMP
A PTC resistor according to DIN 44081 is used for monitoring the motor temperature.
PTC cold R
PTC
< 2 kΩ
PTC hot R
PTC
> 2.4 kΩ
The comparator in the 8230 frequency inverter switches at a resistance value
of 2.1 kWΩ to 2.3 kWΩ and has 0.1 kΩ hysteresis.
The temperature trigger curve is very steep in this range.
If a switch contact is connected here (TMA), the low contact current of 2 mA should
be noted. Suitable switching contacts must be used.
Fig. 21: Motor thermistor connection
Binary inputs
Design: Optocoupler
Number: 12
Input level: 24 V / 14 mA
Fig. 22: Binary signal input
The inputs can be switched with a signal level of DC +12 V ... +30 V (positive logic).
The internal DC +24 V supply voltage should be used wherever possible. The input
current is 14 mA per input.
The standard terminal wiring is stated in section 2.7.2.1. The binary input signals have
a common reference potential at X15 :02 and X15 :26.
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