Bosch PRAESENSA, Installation Manual

Page: 60 / 194

60 en | System controller | PRA-SCL/SCM/SCS PRAESENSA
2019.11 | V1.00 | Installation manual Bosch Security Systems B.V.
All PRAESENSA devices are on the primary network, the secondary network is only
for network redundancy of Dante devices. Also see section
Network redundancy, page
29 .
– To configure the system, access to the webserver of the system controller is needed,
using a web browser and the URL (Uniform Resource Locator) of the system
controller. The URL is printed on the product label and for a PRA-SCL it has the
following format:
https://PRASCL‑xxxxxx‑ctrl.local , with xxxxxx being the last 6
hexadecimal digits of the device MAC‑address. Configuration of the system and its
devices is described in the PRAESENSA configuration manual.
7.6.5 Internal battery
The system controller has an internal lithium coin cell battery, model CR2032 (3 V, 225 mAh),
in a battery holder. It is only used to power the internal real time clock (RTC) when the system
controller is off. The life‑time of the battery is in that case more than 20
years. When the
system controller is on, the RTC is powered from the external power supply and the CR2032
battery is not used, making the system insusceptible to spring contact bounce of the battery
holder in case of heavy vibrations.
Even when the system time is under control of an NTP server, the battery must not be
removed, because it is important to keep the real time clock (RTC) powered during system
restarts, keeping event logs in chronological order. Storage of system data does not depend
on the presence of the battery.
In case battery replacement is needed:
1. Disconnect all power supply connections to the system controller.
2. Remove the system controller from the mounting rack and remove the top cover.
3. Locate the battery on the main printed circuit board, behind Ethernet port 5.
4. Replace the battery with the same type: CR2032 (3 V, 225 mAh). Observe polarity.
5. Assemble in reverse order.
6. Always comply with local requirements for hazardous waste when disposing the old
battery.
!
Warning!
Keep lithium coin batteries out of the reach of small children; coin cell batteries can be
accidentally ingested. If ingested, these batteries may leak harmful contents causing chemical
burns, perforation of soft tissue, and in severe cases may cause death. Lithium coin batteries
must be removed immediately if swallowed. Seek medical attention immediately.
7.6.6 Reset to factory default
The reset switch resets the device to its factory default settings. This function is only to be
used in case a secured device is removed from a system to become part of another system.
See
Device status and reset, page 51 .