Sensor wiring :
The sensor has an integrated AMP Superseal 2 pin connector. The two pins are numbered 1
and 2. Following table shows the relation between wire colour, pin numner and connection to
the respective EGS wires :
For the wire connection see 5.2.2.a inductive sensors - sensor wiring.
Note : the sensor wires have a polarity!
Be sure to correctly observe sensor polarities,
AS WRONG CONNECTIONS WILL DEACTIVATE
THE SENSOR !
5.2.3 Power supply considerations
Traditionally electrical wiring on vehicles is known as being susceptible to problems such as moisture,
vibrations and other environmental stresses.
Adequate connection sealing and cable size usually take care of these problems.
Not so often recognised are problems caused by 'common resistance' in vehicle wiring.
These problems stem from the fact that when a conductor conducts several amperes of current, due
to its internal resistance, significant voltage drops can develop along it.
If a conductor is used to power both a heavy load (e.g. head lamps) and a light load (e.g. a relay), the
light load 'sees' the same supply voltage as the heavy load. Because of the current drawn by the heavy
load, their COMMON supply conductor can easily create voltage drops up to volts.
A conductor with a resistance of 0.05 Ohms connecting both loads with the battery plus generates a
voltage drop of 0.5 Volts when conducting a current of 10 Amperes.
This means that with a 12 Volt battery the relay gets a voltage of 11.5 Volts.
Now if the return line is also shared by both loads (with the same 0.05 Ohm resistance), also here a
voltage drop of 0.5 Volts results. This brings the actual voltage across the relay down to 11 Volts.
In reality larger voltage drops are observed and therefor in some applications it's a must to have
separate power and ground wires as direct to the battery as possible (e.g. via a relay controlled by
the starter switch).
EGS user manual. Page 18 of 25
Document reference : egsman4.doc
Revision date: 07/04/97
Ten Briele 3, 8200 Brugge, Belgium