www.pulsar.pl POE0848C
3
1. Technical description.
1.1. General description.
The PSU is designed for supply of up to 8 webcams requiring stabilized voltage of
48V DC (+/- 1V)
. The PSU
supplies voltage of
48V DC
and total current capacity of
I=8x0,32A+0,5A Battery charging*.
In case of mains power
loss, the unit will instantly switch to battery operation. The power supply is constructed on the basis of a switch mode
PSU with high energy efficiency and 24/48V DC boost converter and is housed in a metal enclosure (RAL 9003) with
battery space for a 2x17Ah / 12V battery. A micro switch indicates door opening (front cover). The power is carried over
the spare pairs (4/5
& 7/8), which, according to the Ethernet network standard, are not used for data transmission (data
transmission uses 1/2 and 3/6 data pairs).
The PSU can not be used in Gigabit Ethernet networks, where all twisted pairs are involved in the
transmission of data!
During normal operation, the total current drawn by the device should not exceed I=8x0,32A
*
.
Maximum battery charging current is 0,5A.
1.2. Block diagram.
Fig. 1. Block diagram of the PSU.
1.3. The description of components and connectors of the PSU.
Table 1. The description of components of the PoE module.
Component No.
[Fig. 2]
Description
[1]
IN
–
screw connection, input power supply of the module (factory setting)
[2]
DC
red LED
– indicates power at the
IN
output
[3]
Optional, external optical indication connector (factory setting)
[4]
PoE 1 ÷ PoE4
- Network outputs (Et power supply)
– for camera connection
[5]
LAN1 ÷ LAN4
– Network inputs (Ethernet) – for connecting the Ethernet network switch
[6]
Mounting board
Fig. 2. Components arrangement.
*
See diagram 1
