CPR32-SE-BRD v3.0 User Manual
2020-10-08
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3.2 LED indicators
According to fig. 3, CPR32-SE-BRD v3.0 is equipped with 5 LED indicators and RESET button (S1)
on its PCB. RESET button can be used to restart the CPR in the same way as in case of powering
device off and then on. The RESET button can also be used during Memory Reset procedure and
during firmware update procedure.
Table 3. LED indicators of CPR32-SE-BRD v3.0
AC (D33)
18VAC power supply on
SYS (D24)
steady light – events buffer is full (the oldest events are being
overwritten by the latest ones)
flashing light – CPR events buffer is filled in 75%
OPN (D19)
18VAC power supply shortage
STAT (D11)
red light – CPR is off (by means of PR Master software)
green light – low level of backup battery
LINK (D2)
Data transmission on RS485 bus
Fig. 3 LED indicators of CPR32-SE-BRD v3.0
3.3 Power supply
Basically, CPR32-SE-BRD v3.0 network controller is designed for power supply from 230VAC/18VAC
transformer with minimal power output 25VA, but it can also be supplied with 12VDC. The
connection of power supply is shown in fig. 4 and fig. 5.
If CPR is supplied with 18VAC, then 12V backup battery can be connected in order to provide
power supply in case of mains supply shortage. The CPR charges backup battery with 300mA
stabilized current up to 13.8V. Backup power supply is activated automatically in case of main
powers supply shortage. If the voltage at backup battery drops below approx. 10V then the battery
is automatically disconnected from CPR and remains disconnected until mains power supply returns.
Depending on charging phase of backup battery, the voltage at AUX and TML terminals may vary in
range of 11V (initial charging phase) to 13.8V (final charging phase) which is not a symptom of
failure but it results from applied concept of battery charging.
In case of 12VDC power supply, backup battery cannot be directly connected to CPR and in such
case backup power supply must be provided by 12VDC power supply unit.
