Wiring: I/O Connections; Safety Features - Zapi EPS-AC0 SWs&ENC User Manual

4
Can advantages
The complexity of today systems needs more and more data, signal and information
must flow from a node to another. CAN is the solution to different problems that
arise from this complexity
- simplified design (readily available, multi sourced components and tools)
- lower costs (less and smaller cables )
- improved reliability (fewer connections)
- analysis of problems improved (easy connection with a pc to read the data flowing
through the cable).

7.7 Wiring: I/O connections

After crimping the cable, verify that all strands are entrapped in the wire barrel.
Verify that all the crimped contacts are completely inserted on the connector
cavities. For information about the mating connector pin assignment see the
description of the connectors in topic 8.
U
A cable connected to the wrong pin can lead to short circuits and failure; so,
before turning on the truck for the first time, verify with a multimeter the
continuity between the starting point and the end of a signal wire.

7.8 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. 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.
Eps-ac0 implements a double µC structure to comply with the Category#3
specification. The second µC main task is to check correct functionality of the first
µC, whose main task is to control the steering motor. Basically, the two
microcontrollers implement a double check control of the main functions.
The two µCs are both CAN Bus connected. This characteristic makes possible the
eps-ac0 receives the steering command (wished steered wheel position) via CAN
Bus fulfilling the norm.
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