8
This section contains the instructions needed for cor-
rect installation of CFW modular power controller on
the machine/host system control panel and for correct
connection of the power supply, inputs, outputs and
interfaces.
CAREFULLY READ THE FOLLOWING WARNINGS
BEFORE INSTALLING THE INSTRUMENT!
Disregard of such warnings could create elec-
trical safety and electromagnetic compatibility
problems, as well as void the warranty.
3.1 Electrical Power Supply
• the controller DOES NOT have an On/Off switch:
the user must install switch/isolator conforming to
safety requisites (CE mark) to cut off the power sup-
ply up-line of the controller.
The switch must be installed in the immediate vicin-
ity of the controller in easy reach of the operator.
A single switch can be used for multiple devices.
* the earth connection must be made with a specific
lead
• If the product is used in applications with risk of
harm to persons or damage to machines or materi-
als, it MUST be equipped with auxiliary alarm de-
vices.
It is advisable to provide the ability to check for
tripped alarms during regular operation.
DO NOT install the product in rooms with hazard-
ous (inflammable or explosive) atmosphere; it may
be connected to elements that operated in such at-
mosphere only by means of appropriate interfaces
that conform to current safety standards.
3.2 Notes on electrical safety and electro-
magnetic compatibility:
3.2.1 CE MARKING: EMC
(electromagnetic compatibility) conformity
In compliance with Directive 2014/30/EU and following
modifications.
Series CFW are mainly intended for industrial use, in-
stalled on panels or control panels of production pro-
cess machines or systems.
For purposes of electromagnetic compatibility, the
most restrictive generic standards have been adopted,
as shown on the table.
3.2.2 LV (low voltage) conformity in compliance with
Directive 2014/35/EU.
EMC compliance has been verified with respect to the
information in Tables 1 and 2.
3.3 Recommendations for Correct Instal-
lation for purposes of EMC
3.3.1 Instrument Power Supply
• The power supply for the electronic instrumentation
on the panels must always come directly from a cut-
off device with fuse for the instrument part.
• Electronic instrumentation and electromechanical
power devices such as relays, contactors, sole-
noids, etc., MUST ALWAYS be powered by sepa-
rate lines.
• When the power supply line of electronic instru-
ments is heavily disturbed by switching of thyristor
power groups or by motors, you should use an iso-
lation transformer only for the controllers, grounding
its sheathing.
• It is important for the system to be well-grounded:
• voltage between neutral and ground must not be
> 1V Ohmic resistance must be < 6
Ω
;
• If the grid voltage is highly unstable, use a voltage
stabilizer.
• In proximity of high-frequency generators or arc
welders, use adequate grid filters.
• The power supply lines must be separate from in-
strument input and output lines.
• Supply from Class II or from limited energy source
3.3.2 Input and Output Connections
Before connecting or disconnecting any connection,
always check that the power and control cables are
isolated from voltage.
Appropriate devices must be provided: fuses or auto-
matic switches to protect power lines.
The fuses present in the module function solely as a
protection for the CFW semiconductors.
• Connected outside circuits must be doubly isolated.
• To connect analog inputs, strain gauges, linears,
(TC, RTD), you have to:
• physically separate the input cables from those
of the power supply, outputs, and power con-
nections.
• use braided and shielded cables, with sheathing
grounded at a single point.
3.3.3 Installation notes
Use the extra-rapid fuse indicated in the catalogue ac-
cording to the connection example equipped.
Moreover, the applications with solid-state units require
a safety automatic switch to section the load power
line. To ensure the high reliability of the device, it is nec-
essary to install it properly inside the panel so to obtain
3. Installation and Connection
Summary of Contents for CFW
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