Manual MVK-MP
10 V 3.5
2.2.3 Cable Routing
You can avoid EMC problems by observing elementary basic rules of cable routing:
Route data lines as far as possible away from power lines.
Route data lines and power lines at least 10 cm apart.
Intersect data and power lines at right angles only.
Route data and power lines in separate, shielded compartments.
Remember the interference potential of other devices or lines when routing the cables.
Place frequency converters, motor lines, and other devices and lines that emit high-
frequency intereference at the greatest possible distance.
2.2.4 Voltage Drops
Short-term voltage drops normally do not pose operational problems as the electronics are protected by
capacitors integrated in the power circuits. This does not apply to the power supply of the sensors and
actuators connected to the module. Their high power requirement cannot be covered by the capacitors
integrated in the device. For this reason, even transient interruptions of the actuator supply can result in
undesirable switching operations.
Due to the integrated input filter, a change in the input signal of less than 1 ms does not cause a change
of the input state signaled to the Master. Longer interruptions of the sensor supply may cause changes
of the input signal.
2.2.5 Separate Power Supplies
Sensors or actuators can be powered by a common power supply unit. However, it is preferable to use
separate power supplies in order to maximize the electromagnetic compatibility of the overall system.
2.2.6 Interference Suppression of Inductive Loads
The outputs of the devices described in this manual have an integrated protective circuit that provides
safety against high-energy interference voltages, such as those that occur when inductive consumers
are switched.
Fig. 1: Interference Suppression of Inductive Loads
A suppressor diode helps to quickly reduce the energy stored in the inductive load of a magnetic field.
Contrary to varistors, suppression with suppressor diodes offer two important advantages:
No aging
Very fast response
(e.g. magnectic valve)
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