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Current consumption and voltage drop
Current consumption
The power supply of the emergency system can provide 250 mA.
When accumulator-operated via the UPS module (only included in the emergency system
set with UPS: NRS .. 0834-2 ..) the following data applies:
Maximum load accumulator-operated: 300 mA / 0.25 h
Rated load accumulator-operated: 130 mA / 1 h
Current consumption of the individual components:
Emergency signal
stand-by 8 mA, call mode 65 mA, (without buzzer 48 mA)
Service unit
stand-by 3 mA, call mode 57 mA
Call and pull cord push-button stand-by 3 mA, call mode 19 mA
Example 1:
An emergency system set should include a second emergency signal and a service unit.
Emergency signal
1 x 65 mA
Emergency signal
1 x 65 mA
Pull cord push-button
1 x 19 mA
Service unit
1 x 57 mA
206 mA
Operation is permissible.
Example 2:
An emergency system set should include a second emergency signal and two service
units.
Emergency signal
1 x 65 mA
Emergency signal
1 x 65 mA
Pull cord push-button
1 x 19 mA
Service unit
1 x 57 mA
Service unit
1 x 57 mA
263 mA
Operation is not permitted. The second emergency signal must be fed from a separate
power supply.
Voltage drop
Observe the voltage drop of the power cables. It must not be higher than 10 %.
This equals 2.4 V.
This results in a maximum loop resistance of the power supply of:
Emergency signal
36.9 ohm
Service unit
126.3 ohm
Call and pull cord push-button 41.1 ohm
