AFNZPxxx– DUALACE2 NEW GENERATION – User Manual Page 47/169
To protect the motor controller from overvoltage at inductive load, internal
freewheeling diodes are mounted to the A24 pin.
Please ensure that inductive loads are connected such that the path for the
freewheeling diode is always intact, or use an external freewheeling diode if
this is not possible.
Use of brushless fan or other loads with built-in capacitor can give high
inrush current when turn ON which will give an Open Drain over current
trip. The inrush current must be below the open-drain peak current.
4.4.8 High-side driver
In premium version only (35-poles Ampseal), a high-side switch provides
redundancy in turning off the EB and the EVs. If one of the open-drain outputs is
short circuited, it is possible to turn off the high-side switch so to disconnect the
load on pin A27 (PEB) from the positive supply on pin A24 (PIN).
The high-side switch has a maximum output current of 5 A. The high-side switch
can only be controlled as an on/off switch, it is not suited for switching operation.
The high-side switch has a maximum output current of 4 A.
The high-side switch can only be controlled as an on/off switch, it is not suited for
switching operation.
Protection
Built-in diagnostics:
- Shorted driver
- Open driver
Refer to chapter 10 for more detailed description.
Connector position
Premium
A24, A27
4.4.9 Motor-temperature measurement
Inputs for motor-temperature sensors, for measuring the temperature of each
motor windings, is available on pin PTH_R A32 (A22) and PTH_L A33 (A23).
Compatible temperature sensors are like:
- KTY84 with 1000Ω @ 100°C.
- KTY83 with 1670Ω @ 100°C.
- PT1000 with 1385Ω @ 100°C.
- On/Off.
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