Overview of all connections
15
4.4
Socket for backup battery
Most models are equipped with a socket for a backup battery.
The backup battery is automatically charged during normal
mains operation. The backup battery supplies the device with
power for up to 3 hours in the event of a power failure.
A type with 3.7 V / 750 mA must be used as backup battery.
Suitable rechargeable batteries are available from
FP InovoLabs GmbH.
Fire or damage to property due to incorrect rechargeable
batteries
Commercially available AA rechargeable batteries (1.2 V) will
damage the device and may even cause a fire by destroying the
battery.
Only use rechargeable batteries of the specified type
(3.7 V / 750 mA).
Do not use commercially available rechargeable batteries
(1.2 V).
Please note that the M-Bus does not work in rechargeable bat-
tery mode.
Variable
/Process/SysIO/P0
The loss of the energy supply can be detected via the system
variable
/Process/SysIO/P0
. With normal mains power supply, the
variable is set to “1”. As soon as the power supply fails, the var-
iable changes to “0”.
Via an appropriately programmed EventState/EventHandler,
emergency actions can still be triggered if the mains power
supply fails. Emergency actions can be:
– Sending a message via GSM (SMS, EMail; only useful for de-
vices with GSM modem)
– Creating a log entry to document time of power failure
Variable
/Process/SysIO/P3
The variable
/Process/SysIO/P3
indicates the state of
charge of the rechargeable battery.
(1=Charging process running, 0=charging finished)
Variable
/Process/SysIO/P4
The variable
/Process/SysIO/P4
indicates the battery
voltage in mV.
Summary of Contents for 50.0070.0001.00
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