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CIAS Elettronica S.r.l.
Ed. 1.1
Installation Manual
Page
53
of
76
PYTHAGORAS 3
3.2 Connection to Power Supply
The units must be powered by direct current at a nominal voltage of 13,8 V
, using the MS5
connector on the transmitter and receiver interface circuit.
The connection between the power supply and the device must have adequate dimensions,
calculating the cross-section based on the length of the connection and the current
consumption of the devices. When the connection is very long it is recommended to use a
supplementary power supply.
A table is reported below indicating the length of the conductors based on the minimum section
implemented. The conductors must be of the shielded and braided type.
Section of
wires
[mm
2
]
Wires length [m]
Wires length [m]
PYTHAGORAS3 100
PYTHAGORAS3 160
Tx
Rx
Tx
Rx
0,6
120
80
100
80
1,5
280
200
250
200
2,5
480
300
450
300
4
750
500
700
500
Note:
When using the same cable to power several Pythagoras3 barriers the distances
indicated must be divided by the number of barriers connected.
3.2.1 Connection to the Power Supply for Heating
The power supply concerning the heating system must be realised through a separate power
supply line other than that used for the module. Connect the power line directly to the terminal
block of each IR Module to the pin named as "HEATER".
This power supply can be either of the 12V
or 12V~ type.
3.2.2 Connection to Main Power Supply
The connection between the supplementary power supply and the 230/240
V~ network must
use conductors of the correct size, as proscribed in local regulations.
The connection of the 230/240 V~ network must be made using a suitable size device with the
following characteristics:
bipolar with a minimum distance of 3mm between the contacts.
configured as part of the fixed system
easily accessible
It is possible to use the Newton-Alim power supply inside the TX and RX column.
Full attention must be paid to the rules and regulations covering the permanent
connection of fixed devices to the national power supply network such as Law
46/90 and CEI 64-8 Standard in Italy.
3.2.3 Connection to Stand-by Power Supply (Battery)
The optional 12 V
2.1Ah battery placed inside the column and recharged by the Newton-Alim
will provide power supply autonomy for more than 12 hours (Fault contact is activated after
main power failure of more than 3 hours, if the positive for main present is connected on
terminal MPR ).
N.B.
the casing of the stand-by batteries used must be of self-extinguishing class HB or better (
Standard UL 94 ).