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The RTU is powered at low voltage (12VDC 160mA), preferably using a
power supply module with battery backup (RTU-Qxx), or using an ordinary
power supply having the same characteristics. The power cables must be
dimensioned as indicated in the table below. The maximum allowable voltage
drop on the power cable is 1V.
•
Cable length(m) = 1V / (I[A] load x 2 x (res [Ohm/km] /1000))
Cabl e Type
Ext ensi on [ m] based on l oad
AWG
mm2
ohm/ Km 160 [ mA] 320 [ mA]
12
3. 3
5. 7
548
274
14
2
8. 8
355
178
16
1. 3
14
223
112
18
0. 9
21
149
74
20
0. 6
34
92
46
22
0. 35
52
60
30
24
0. 2
85
37
18
The device is equipped with 2 non-removable cables of 2m length:
•
Two-pole, twisted, unpolarized cable dedicated to the LON line
connection
-
LON a
0,325 mm
2
white
-
LON
b 0,325
mm
2
orange
•
Ten-pole cable, providing the following signals:
-
+12VDC
0,34
mm
2
red
-
GND
0,34
mm
2
black
-
INPUT 1 +
0,22 mm
2
green / white
-
INPUT 2 +
0,22 mm
2
gray
/
green
-
RELAY 2 contact C
0,22 mm
2
brown
-
RELAY 2 contact NC
0,22 mm
2
white
-
RELAY 2 contact NO
0,22 mm
2
blue
-
RELAY 1 contact C
0,56 mm
2
green
-
RELAY 1 contact NC
0,56 mm
2
yellow
-
RELAY 1 contact NO
0,56 mm
2
gray
The signals must be connected using a shunt box with IP protection level
in conformance with the type of environment in which it is to be used:
-
IP55 for moist environments
-
Recessed box or IP31 at least for inside installations
The shunt box must be positioned within the perimeter controlled by the
access control system.
