11-85G5-7D0002/B-EHT-10/2021 33
16.6. Information on project planning, wiring diagrams
When supplying power to point sensors PSO and PSO+, it must be ensured that the voltage drop across the supply line does not
become too great and that the current limit of the voltage source is not exceeded.
PSO and PSO+ ratings: Umin PSO = 16.8V; InPSO = 20mA
a) Voltage drop on the supply line
Example 200 m total length; 0.5 mm²; ρ copper = 0.018
; Un = 24 Vdc
= 7.2 Ω = 7.2 V
= 50 pieces
Example 350 m total length; 0.5 mm²
= 12.6 Ω = 7.2 V
= 28 pieces
b) The current limit of the voltage source
ATTENTION!
Warning of system damage due to an overloading of the power pack
Observe the maximum rated current when connecting PSO and PSO+ sensors. If necessary, use a
separate power pack.
With BARTEC wall-mounted devices, a power pack is used, which serves to power the built-in devices. If additional point sensors PSO
and PSO+ are to be connected directly to this power pack, the maximum nominal current must be taken into account. A separate
power supply must be used.
The potential separation between the measuring circuit and the power supply, as well as to the alarm contact in the point sensors PSO
and PSO+ enables the use of decentralised power supplies.
Configuration of the power supply unit:
Rated current RLA
net
: Ir = 0.25 A
Rated current PSO+/PSO: Ip = 20 mA
Rated current power relay coil (example): Is=90 mA
Universal power pack installed in the wall housing (example): In = 0.63 A
Example universal power supply; 1 RLA
net
:
= 19 pieces
Example universal power supply; 1 RLA
net
; 1 power relay:
= 15 pieces
Example separate universal power supply: In = 1.2 A
= 60 pieces; max. 50 pieces per RLA
net
Factory-made devices "RLA
net
in wall housing" are pre-wired according to the following wiring diagrams. The connection plan is glued
into the housing as a label.
Type 17-85G5-21230901 IP housing; 1 universal power supply; 1 RLA
net
Guaranteed number of PSO/PSO+ that can be supplied by the power pack (0.63 A): 19 pieces
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