Transition Networks
SI-IES-1200-LRT User Manual
33586 Rev. D
https://www.transition.com
Page
9
of
21
Wiring the Power Inputs
This device is recommended for Environment A. Use of an isolated power supply is recommended.
Follow the steps below to wire power lines from the terminal block to a compliant external DC power
source.
1. Before wiring, make sure the power source is disconnected.
2. Using the wire-stripping tool, strip a short piece of insulation from the output wires of the DC power
source.
3. Identify the positive and negative connection locations on the terminal block. See the symbols
printed on the panel indicating the polarities and DC voltage input power range.
4. Insert the exposed wires into the terminal block plugs. Only wires with insulation should extend
from the terminal block plugs. Note that the polarities between the wires and the terminal block
plugs must be positive to positive and negative to negative.
5. Use a slotted screwdriver to tighten the captive screws.
ATTENTION
:
Use Copper Conductors Only. At 60-75 ̊C, tighten to 5 lb-in. The wire gauge for the
terminal block should be in the range of
12~24 AWG.
Note
: The SI-IES-1200-LRT contains boost circuitry that will automatically step the voltage up from 24-
48 to 51VDC, so you do not need to adjust input voltage above 48VDC in order to meet IEEE802.3at
PoE+ spec.
The SI-IES-1200-LRT provides 51VDC with 600mA to the PD, which meets the IEEE802.3at spec.
So even you have the input to the SI-IES-1200-LRT set to 48VDC, the POE port output always
provides 51VDC.
