11
Electrical connection
Caution!
For the wiring and connection of the controller, you are required to observe the regulations
of the Association of German Electrical Engineers (VDE) and your local power supplier. For
this reason, this type of work must be carried out by a specialist.
Caution!
The controller inputs are not DC-isolated from the control outputs. If actuators and active sen-
sors are used which are supplied from the same operating voltage source, either all the ac-
tuators or all the sensors must be DC-isolated.
If these instructions are not followed, the
controller may be destroyed.
Notes concerning the electric wiring
4
Use separate cables for the 230 V supply lines and the signal lines! To improve the noise
immunity, keep a minimum distance of 10 cm between these cables. This distance also
applies to the cables inside the control cabinet.
4
Use separate cables for the digital signals (bus lines) and the analog signals (sensor ca-
bles, analog outputs).
4
We recommend that shielded cables be used for analog signal lines in systems with a
high level of electromagnetic noise. Ground the shield at the control cabinet inlet or out-
let, using a large surface contact. Connect the central grounding point using a cable with
≥
10 mm
2
on the shortest route to the PE grounding conductor.
4
Equip the inductances in the control cabinet, e.g. contactor coils, with suitable interferen-
ce suppressors (RC elements).
4
Control cabinet elements with high field strengths, e.g. transformers or frequency conver-
ters, should be shielded by means of separators that have good chassis ground.
Surge protection measures
4
If signal lines are routed outside of buildings or over long distances, you are required to
provide appropriate surge protection measures. Theses are imperative when bus lines are
used.
4
The shield of signal lines that are routed outside buildings must have current carrying ca-
pacity and must be grounded on both sides.
4
The surge diverters must be installed at the control cabinet inlet.
86
EB 5477 EN
Electrical connection
!
!