====== Powering Unipi units through PoE ======
This tutorial describes the connection of Unipi controllers using 802.3at PoE+ splitter. The splitter must be supplemented and powered by a PoE injector or any PoE switch. This connection is useful especially if you need to place the controller in locations lacking a conventional 110 / 230 V~ socket (ie. sensor stations). This tutorial will show you how to power the Unipi over Ethernet cable while retaining local network connectivity.
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Neuron \\
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Axon
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== Components used in the tutorial ==
* Cat6 network cable (RJ45)
* conductor (Cu, 0.5mm2)
* Planet IPOE-162S PoE splitter ([[https://www.unipi.technology/ipoe-162s-splitter-p432?categoryId=15|e-shop link]])
* Planet IPOE-162 PoE injector ([[https://www.unipi.technology/ipoe-162-injector-p433?categoryId=15|e-shop link]])
* Unipi controller
==== Connection example ====
{{ :en:automation:unipi_-_injector_a_splitter.png?direct |}}
== Planet IPOE-162S ==
- set the splitter for 24 V⎓ voltage using the onboard switch
- connect the splitter’s V+ clamp to the PLC’s 24V clamp
- connect the splitter’s V- clamp to the PLC’s GND clamp
- using the network cable, connect the splitter’s **Data Out** port with the controller’s **ETH** port
- plug an 802.3at PoE+ compatible network cable into the splitter‘s **PoE In** port
== Planet GSD-908HP ==
- connect **Ethernet+DC** port to the **PoE In** port on the splitter via a suitable network cable
- connect the WAN network cable into the **Ethernet** port
==== Technical data ====
Using a single splitter to power multiple controllers is not recommended!
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{{ :en:automation:switch_splitter-table1_en.png?direct&nolink |}}
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==== Calculating the maximum load – examples ====
The calculations below are applicable for GSD-908HP PoE+ switch and IPOE-162S PoE+ splitter.
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1) Maximum number of connected Unipi Neuron L403 controllers
- maximum load of the Neuron L403 = 24 W
- maximum load of the splitter = 25 W
* 25 W – 24 W = 1 W
* the resulting value is a positive number = suitable
- maximum load of the switch = 100 W
* 100 W ⁄ 24 W = 4,166
__Based on these calculations, we can **safely use 4 PoE+ powered Neuron L403's**__
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2) Maximum number of connected Unipi Patron S107
- maximum load of the Patron S107 = 12 W
- maximum load of the splitter = 25 W
* 25 W – 12 W = 13 W
* the resulting value is a positive number = suitable
- maximum load of the switch = 100 W
* 100 W ⁄ 12 W = 8,333
__Based on these calculations, we can **safely use 8 PoE+ powered Patron S107's**__
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3) Various combinations of Unipi models
- maximum power input:
* Patron L207 -> 17 W (1×)
* Patron M207 -> 14.5 W (2×)
* Patron S107 -> 12 W (remaining)
- maximum load of the splitter = 25 W
* 25 W – 12 W = 13 W
* 25 W – 14.5 W = 10.5 W
* 25 W – 17 W = 8 W
* the resulting value is a positive number = suitable
- maximum load of the switch = 100 W
* 100 W – 17 W – 2 × 14.5 W = 54 W
* The remaining: 54 W ⁄ 12 W = 4.5
__Based on these calculations, a single switch **can power 1× Patron L207, 2× Patron M207 and 4× Patron S107**__