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This section contains the instructions needed
for correct installation of GTF controllers on the
machine/host system control panel and for correct
connection of the power supply, inputs, outputs
and interfaces.
CAREFULLY READ THE FOLLOWING WAR-
NINGS BEFORE INSTALLING THE INSTRU-
MENT!
Disregard of such warnings could create elec-
trical safety and electromagnetic compatibility
problems, as well as void the warranty.
2.1
e
lectrical 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 supply up-line of the controller.
The switch must be installed in the immediate vicinity 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 materials, it MUST be equipped with
auxiliary alarm devices.
It is advisable to provide the ability to check for tripped alarms
during regular operation.
DO NOT install the product in rooms with hazardous
(inflammable or explosive) atmosphere; it may be connected to
elements that operated in such atmosphere only by means of
appropriate interfaces that conform to current safety standards.
2.2
n
otes on electrical safety anD electromaGnetic
:
comPatibility
2.2.1
CE MARKING: EMC
(electromagnetic compatibility) conformity
in compliance with Directive 2014/30/EU and
following modifications. Series GTF controllers are
mainly intended for industrial use, installed on panels
or control panels of production process machines
or systems. For purposes of electromagnetic
compatibility, the most restrictive generic standards
have been adopted, as shown on the table.
2.2.2
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.
4
2 • INSTALLATION AND CONNECTION
2.3
r
ecommenDations for
emc:
PurPoses of
2.3.1
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, solenoids,
etc., MUST ALWAYS be powered by separate lines.
• When the power supply line of electronic instruments
is heavily disturbed by switching of thyristor power
groups or by motors, you should use an isolation
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 < 6Ω;
• 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
instrument input and output lines.
• Supply from Class II or from limited energy source
2.3.2
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
automatic switches to protect power lines.
The fuses present in the module function solely as a
protection for the GTF
• 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 connections.
- use braided and shielded cables, with sheathing
grounded at a single point.
2.3.3
Installation notes
Use the extra-rapid fuse indicated in the catalogue according
to the connection example equipped.
- Moreover, the applications with solid-state units requi-
re a safety automatic switch to section the load power
line.
To ensure maximum reliability, the device must be cor-
rectly installed in the panel in such a way as to obtain
adequate heat exchange between the heat sink and the
surrounding air under conditions of natural convection.
Fit the device vertically (maximum angle 10° to the ver-
tical axis) see figure 3.
80960G_MHW_GTF_05-2019_ENG
c
i
orrect
nstallation for
semiconductors.
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