Parker EME
I/O and signal cables
51
192-300300N1 GVI Frames C, D & E 2019-9
12. General considerations for
system design
In the following section some common causes for issues in a system are listed, together with general
information about how to avoid them through proper system design.
12.1 I/O and signal cables
•
Physically separate power cables from signal cables. As a rule of thumb minimum
separation of 100 mm.
•
Do not connect any signal ground to the vehicle frame, (even if it is allowed in a
24 V system according to EN1175-1).
•
Verify noise levels on analog and digital inputs with different functions in operation
running (traction, hydraulics etc.).
•
Very high currents may circulate between motor controller and battery. Even if cables
are dimensioned correctly, this may lead to a significant voltage drop between motor
controller B- terminal and negative terminal on the battery. This means that there may
be voltage differences between GND references of different units in a control system.
Therefore it is strongly recommended to connect all wires of sensors supplied by the
motor controller directly to the intended GVI I/O connector pins.
•
Consider an alternative path for I/O cables that generates less noise (EMC).
•
To avoid damage to PCs or other external instrumentation connected to the mains
network, use a galvanic isolated CAN interface.
12.1.1. Motor and battery connection cables
As an alternative to unwieldy, heavy gauge cables, two thinner cables in parallel can be used. The total area
of the thinner cables shall exceed the area of the large cable.
12.2 Power cables
•
To avoid burning or overheating of the high-current terminals, ensure that the cable
connection has been made according to chapter 10.6, and that the correct torque has
been applied to screws or nuts. If the power cables are not connected properly, excess
heat will be generated that could damage both the motor controller and other equipment
in the vehicle.
•
If a washer is used between cable-lug and terminal, it must be made of copper.
Otherwise overheating may occur.
•
Use sturdy ring lugs made from a tube (see Figure 33), not from a plate.
Figure 33 Ring lug made from tube
