Lantronix
LSS2200-8P Install Guide
23
Power Supply Information
Important
: Read all power supply information and powering examples before proceeding.
The LSS2200-8P can be powered by these Lantronix power supply options:
•
25172 Weidmuller PRO MAX 960W 48V 20A DIN Rail Power Supply (recommended for full PoE output)
•
25160 Hardened 480W DIN Rail Mounted Power Supply
IEEE 802.3bt Power Input Ripple and Noise Specification
f
< 500 Hz
V
Noise
V
pp
0.5
500 Hz to 150 kHz
0.2
150 kHz to 500 kHz
0.15
500 kHz to 1 MHz
0.1
Power Input
The LSS2200-8P has a 4-pin terminal block that allows for two power inputs. The switch can be powered by a
single power supply that meets power input and total power output requirements, or it can be powered by dual
power supplies for redundant power.
The power input required is 46 – 56VDC, depending on the PoE output level required. Note that the input
power must be set to the following voltage if
any
of the ports require the corresponding PoE levels:
IEEE 802.3af = min 46VDC
IEEE 802.3at = min 52VDC
IEEE 802.3bt = min 54VDC
Example: If
any
port is providing IEEE 802.3bt to a powered device, the power input must be at least 54VDC.
The recommended power supply for powering the LSS2200-8P and providing full power on all ports is part
number 25172, Weidmuller Pro Max 960W 48V 20A power supply. The external power supply rating
requirement for the switch is higher than the simple sum of the PoE PD requirements. The first 30W of power is
immediately reserved for the LSS2200-8P. Also, there is an additional amount of power (called a “guardband”)
required in excess of each PD’s power requirement. Use the chart below to determine the amount of power
required:
PoE Class
Maximum PD input
power draw
Maximum PSE output
power source
Maximum power including
guard band
0
13
15.4
16.2
1
3.84
4
4.2
2
6.49
7
7.4
3
13
15.4
16.2
4
25.5
30
31.2
5
40
45
48.6
6
51
60
65
7
62
75
81.8
8
71.3
90
97
Example
: For a fully loaded system, add the LSS2200-8P system power required (30W) + qty 8 ports of 802.3bt
power required (8 x 97W or 776W) = Total 806W.