User manual

AE9ZP0BD - DUALAC2/&HP/POWER - User Manual Page - 21/89
- External agents:
The inverter is protected against dust and the spray of liquid to a degree of
protection meeting IP65.
- Protection against uncontrolled movements:
The main contactor will not close if:
- The Power unit is not functioning.
- The Logic is not functioning perfectly.
- The output voltage of the accelerator does not fall below the minimum
voltage value stored, with 1 V added.
- Running microswitch in closed position.
- Low battery charge:
When the battery charge is low, the maximum current is reduced to the half
of the maximum current programmed.
- Protection against accidental Start up
A precise sequence of operations are necessary before the machine will
start.
Operation cannot begin if these operations are not carried out correctly.
Requests for drive, must be made after closing the key switch.
4.3.2 Safety Features
U ZAPI controllers are designed according to the prEN954-1 specifications for
safety related parts of control system and to UNI EN1175-1 norm.
U The safety of the machine is strongly related to installation; length, layout
and screening of electrical connections have to be carefully designed.
ZAPI is always available to cooperate with the customer in order to evaluate
installation and connection solutions. Furthermore, ZAPI is available to
develop new SW or HW solutions to improve the safety of the machine,
according to customer requirements.
Machine manufacturer holds the responsibility for the truck safety features
and related approval.
Dualac2 controller electronic implements double hardware circuit for four Digital
inputs: Seat (C5), Forward (C6), Reverse (C7), Accelerator Enable (C8) and one
Analog input: CPOT (C21).
These signals are input, through two independent hardware circuits, to both
microcontrollers which implement a cross-check of the inputs status, thus
preventing an abnormal behaviour due to a failure in the input hardware.
It is strongly suggested to connect the machine safety related devices to these
five inputs, in order to increase machine safety.
4.4 EMC
U EMC and ESD performances of an electronic system are strongly
influenced by the installation. Special attention must be given to the
lengths and the paths of the electric connections and the shields. This
situation is beyond ZAPI's control. Zapi can offer assistance and
suggestions, based on its years experience, on EMC related items.
However, ZAPI declines any responsibility for non-compliance,
malfunctions and failures, if correct testing is not made. The machine