AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual Page – 29/155
4
EB output can be only a PWM voltage-controlled output. It cannot be used as
current-controlled output.
4
For version different from 24V, it is suggested to discuss with Zapi technicians
about the supply of pin A2.
U
Driving an inductive load on a PWM open-drain output, make sure to have
always a path for the current through the freewheeling diode. Do not
connect any switch or fuse in series with the diode.
Connector position
A2, A4.
U
To protect the motor controller from overvoltage at inductive load, internal
freewheeling diode to pin A2 is built-in.
U
Please ensure that the inductive load is connected such that the path for
the free-wheeling diode is always intact, or use an external free-wheeling
diode if this is not possible.
U
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.
4.4.8 Auxiliary outputs
Open-drain outputs can be used for operating services such as relays, hydraulic
valves, horn, etc.
They work in different modes depending on the hardware structure:
On/off (EV1, EV4, EV5, and HORN).
PWM current controlled (EVP1, EVP2).
PWM voltage controlled (EV2, EV3).
In order to utilize the built-in free-wheeling diodes, the loads must be supplied
from pin A3 (see paragraph 3.2).
In case the vehicle design does not allow the usage of the built-in free-wheeling
diodes, i.e. if the return path integrity cannot be guaranteed in all situations,
external free-wheeling diodes must be applied over the inductive loads supplied
by the open drain outputs.
ON/OFF outputs features
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