Installation guide to electronic modules to provi-
sion of electromagnetic compatibility
Power Supply
The utilized power supply has to comply with the
EMC-standards (CE-sign, certificate of conformity).
Relais and solenoids operating from the same
supply circuit as the valve electronics have to be
fitted by surge protection elements.
Wiring Cable
The wires between the installation site of the module
and the peripheral units, as power supply, valve
solenoids, position transducer, command signal
source have to be shielded. The following wire
sizes must be reached: power supply AWG 16,
other connections AWG 20. The capacity should not
exceed a value of approx. 130 pF/m (wire/wire). The
maximum cable length is 50 m. No power current
lines may be placed within the wired shielded cables
to the electronic module. The cable shield has to be
connected to ground at both ends (see also chapter
“Grounding“). Please be aware of ground loops.
Installation
The module has to be mounted within a conductive,
shielded enclosure. Usable is i.e. an EMC-approved
control cabinet. A perfect grounding of the enclosure
is mandatory (see also chapter “Grounding“).
Grounding
The mounting plate of the valve has to be con-
nected to the grounded metal machine frame. The
cable shields must be tied to ground at the control
cabinet. A low-ohmic potential compensation wire
has to be provided between the control cabinet
and the machine frame (cable wire >AWG 7 cross
section) to prevent ground loops.
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