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1. Technical description
1.1. General description.
The S64-BR is a complete solution for uninterruptible power supply of 4 IP cameras (52 V DC power supply)
and uninterruptible power supply of the DVR (12 V DC power supply).
The main elements of this system include:
- 6 ports PoE switch
- buffer power supply 27,6 V unit which can accommodate 2 x 1 7Ah/12 V batteries
- a converter (DC/DC52115) increasing the voltage to 52 V DC (supply of the PoE switch)
- 12 V DC (DC/DC50SD) buck converter (DVR power supply)
In case of power decay, a battery back-up is activated immediately.
The approximate backup time is given assuming that all output ports are used (using typical devices and 17 Ah
batteries). The electricity consumption for own needs and the energy efficiency of the power intake track were taken into
account. The exact description of how to perform the calculations can be found at:
"Approximate backup time - assumptions
Automatic detection of any devices powered in the PoE/PoE+ standard is enabled at the 1
– 4 ports of the switch. The
UpLink port is used for connection of another network device e.g. recorder. The LEDs at the front panel indicate the operation
status (description in the table. 8).
The switch is housed in a metal enclosure (color RAL 9003) which can accommodate 2x17 Ah/12 V battery. The
enclosure features a micro switch tamper indicating door opening (front panel). The S64-BR is fitted with two LEDs on the
front panel (red LED
– indicates the presence of 230 V supply voltage, green LED indicates the presence of DC voltage).
The PoE technology ensures a network connection and reduces installation costs by eliminating the need to supply a
separate power cable for each device. This method allows supplying other network devices, such as IP phone, wireless
access point or router.
1.2 Block diagram.
Fig. 1. Block diagram.
