SystemAir Sense SNX, Installation,Operation And Maintenance Instruction, Page: 22 / 28

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11. Wiring
Electrical equipment is connected at the control box.
Electric supply cable and HMI cable are not included!
It has to be installed before the commision. Choose
the type and thickness of the cable according to the
proudct’s maximum power consumption and the specific
requirements of the place of installation.
All the product's electrical circuits must be connected
through an residual current device (RCD) switch
according to regulations of the country where the unit is
installed. The product must be installed together with an
emergency switch.
Wiring power lines
Use standard stranded cable and wiring. The ends can
be connected directly or strengthened with conductor
sleeves or pin connectors.
•
Min. 0,5 mm2/AWG 24
• Max. 2x1,5 mm2/AWG16 or 1x 2,5 mm2/AWG13 Set
the torque to 0,5 – 0,6 Nm
• Supply cables must be secured with cable restraints
• The AC 230 V installation must guarantee that the
voltage is at least 230 V - 15% (196 V) at the
controller.
Ethernet network
Building automation and control systems must use a
separate technical network with very restricted and
selective connection to the rest of the intranet and no
connection at all to the internet. This can be done using a
VLAN or a separate subnet.
Standard Ethernet cable (min. category 5)
• STP (Shielded twisted pair)
• Length between switch and room automation station:
Max. 100 m
• Length between room automation stations: Max. 30 m
• Number of devices in a line topology: Max. 20
• Standard IT product at 100 MB
• BACnet on IP network
• Max. length between two room automation stations:
500 m
• Max length for stubs: 30 m
• Max. cable length of an MS/TP segment (including
stubs): 1000 m
• Long distances can be spanned using routers.
• MODBUS
• Low slew rate 1/8-unit load transceiver
Caution
• Service switch must be turned off
before working on the unit.
• The electrical installation must be
done pursuant to the technical
documentation and by a certified
electrician. The unit installation
should be done by a qualified
technition with experience in
electrical applications. The manuals
must be observed, together with
the laws and regulations applicable
in the country.
• The wiring diagrams located on
the product have a higher priority
than those in manuals. In case
of doubt, contact the supplier
before preforming any work on the
product.
• The unit must be connected to the
main power source via isolated
cable in compliance with the
diameter and the applicable laws
and regulations of the country
where the unit is installed.
• Any altering or changes to the
internal connections of the unit are
forbidden and may result in the loss
of warranty.
• Only using of original components
guarantees the correct function of
the product.
11.1 Electric power cable
Position Description
1 Controller
2 EMI filter
3 DC power supply (24V)
4 6A fuse for fan, controller, pump
5 Contactor for electric heaters (depend on options)
6 Terminal blocks
L/N
LA
N
USB
-EMI1
1
2
3
4 5
6