HSD SM 137 D, Assembly Instructions Manual

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5 Installation and commissioning
HSD S.p.A. © - h0104k01a.fm291119
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5.5 Electrical connections
Refer to the product rating plate for the installed electric power. See paragraph 3.3 “Identification of
the manufacturer and the product” .
The electrical connections must be made by specialised, suitably trained personnel.
Before making the electrical connections, make sure the electricity supply has been
disconnected so there is no voltage present.
The device must always be protected from the dangers caused by indirect contact
and overload or overcurrent. Prepare adequate protections during installation,
referring to the technical characteristics of the product.
The device needs two different power supplies provided by two different units:

a logic supply of a suitable power level, protected by a fuse with a nominal value no higher
than 4A;

a power supply protected by a delayed fuse with a nominal value no higher than 10A.
For more information about the technical product data, refer to appendix A “Technical
characteristics” .
When running the device the first power that must be supplied is the logical power and then the
power supply. When switching the device off, first disconnect it from the power supply and then
from the logical power.
The user must provide suitable safety insulation between cables and SELV or PELV
type components and all the other components.
Do not perform maintenance operations or insert/remove modules or connectors
while the system is powered.
A connection error (supply, Fieldbus) could cause immediate, irreversible damage to
the main device and the others connected to it.