www.pulsar.pl POE1648C
3
1. Technical description.
1.1. General description.
The PSU is designed for supply of up to 16 webcams requiring stabilized voltage of
48V DC (+/-15%)
. The PSU
supplies voltage of
54V DC
and total current capacity of
I=16x0,3A+0,5A Battery charging*.
In case of mains power
loss, the unit will instantly switch to battery operation. The PSU is constructed based on the switch mode PSU, with high
energy efficiency. The PSU is housed in a metal enclosure (colour RAL 9003) which can accommodate a 4x17Ah/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=16x0,3A
*
.
Maximum battery charging current is 0,5A. Total current of the receivers + battery is max 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.
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
Table 1. The description of components of the PoE module.
*
See diagram 1