AFNZPxxx– DUALACE2 NEW GENERATION – User Manual Page 45/169
Built-in diagnostics:
- Overcurrent
- Driver shorted
- Driver open
- Coil open
Refer to chapter 10 for more detailed description.
Overcurrent protection is applied by hardware.
EB outputs can be only a PWM voltage-controlled output. It cannot be used as
current-controlled output.
Driving an inductive load on a PWM-modulated open-drain output, there is
always to be a path for the current through the freewheeling diode. Do not
connect any switch or fuse in series with the diode.
Connector position
Standard Premium
A18, A19 A28, A29
To protect the motor controller from overvoltage at inductive load, internal
freewheeling diode toward pin A27 (A17) is built-in.
Please ensure that the inductive load is 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 fans or other loads with built-in capacitor can give high
inrush current at turn on, which can give an open-drain over-current trip.
The inrush current must be below the open-drain peak current.
4.4.7 PWM current-controlled output
In premium version only (35-poles Ampseal) an additional Open-drain current
controlled output can be used for operating services such as relays, hydraulic
valves, horn, etc.
In order to utilize the built-in freewheeling diodes, the loads must be supplied
from pin PIN A24, see paragraph 3.1.1.
In case the vehicle design does not allow the usage of the built-in freewheeling
diodes, i.e. if the return path integrity cannot be guaranteed in all situations,
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