Nivus NivuLog Easy V3 User Manual Download

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Chapter 8 Installation

8.6.9 Technical details about detecting the failure of the supply voltage

Power supply units with an integrated rechargeable buffer battery (PSU DC+ for NivuLog EASY V3 and
PSU AC for NivuLog Easy V3 ) enable a message to be issued in the event of a supply voltage failure.
However, generation of an alarm must be activated via the relevant parameter in the "Basic settings"
configuration section (see "Basic settings" on page 99).

As soon as the supply voltage fails and subsequently the output voltage of the power supply unit V

PSU OUT

(see "Block diagram" on page 23) falls below 9V , this initiates the malfunction message to be issued, as long
as a time delay for issuing the malfunction message has not been entered via the "Delay for power off alarm"
parameter in the "Basic settings" configuration section (see "Basic settings" on page 99). The fact that the
value has fallen below the threshold is definitely entered in the device log with the "MODULE INFO (403), 1"
log entry. If the output voltage of the power supply unit continues to fall, the power supply is switched to the
rechargeable buffer battery. This second threshold on the PSU DC+ for NivuLog EASY V3 is dependent on
the state of charge of the rechargeable buffer battery (7V when fully charged, 6V when practically
discharged). This second threshold is 17V on the PSU AC for NivuLog Easy V3 . If a time delay has been
configured, the NivuLog Easy V3 continues to operate normally until the time delay has elapsed. If during the
time delay, the output voltage of the power supply unit once again rises above the threshold (6V to 7V on the
PSU DC+ for NivuLog EASY V3 or 17V on the PSU AC for NivuLog Easy V3 ) that is dependent on the
state of charge of the rechargeable buffer battery, then the rechargeable buffer battery switches back to the
supply via the output voltage of the power supply unit. If the output voltage of the power supply unit increases
further and also exceeds 9V , this is entered in the device log with the "MODULE INFO (403), 0" log entry. If
the output voltage of the power supply unit is below 9V when the time delay elapses then issuing of the
malfunction message is initiated.

The device establishes a connection to the server to issue a malfunction message. Any outstanding data is
also transmitted to the server during this process. The outputs are then deactivated and all operations with
the exception of monitoring the output voltage of the power supply unit and the cyclical transmission are shut
down. No measurement data is determined in this state.

If it was switched to the rechargeable buffer battery it is only possible to establish a connection with the sever
as long as the internal supply voltage V

batt

(see "Block diagram" on page 23) is above 3,4V . The modem is

deactivated from this threshold and the "UV MODEM LOCKOUT" log entry is entered in the device log. This
means that the connection is disconnected if the device is in "online" mode or is logged in to the GSM network
("Interval & wakeup" mode). Once this threshold has been reached, a connection establishment cannot be
triggered manually via the button (see "Solenoid switch" on page 73) or automatically via the system. If the
internal supply voltage falls below 2,9V , the NivuLog Easy V3 switches to energy saving mode. The "UV
LOCKOUT" log entry is also entered in the device log during this process. This state is maintained until the
rechargeable buffer battery is fully discharged or the output voltage of the power supply unit rises above 9V
again. The NivuLog Easy V3 resumes normal operation above 9V . A hardware-based controller in the power
supply unit ensures that the rechargeable buffer battery is charged as soon as the supply voltage is available
again.

NivuLog Easy V3 - Rev. 03 as of 24.10.2018

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