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Jignesh Desai
Jignesh Desai • Jul 26, 2017

How much Power would a 18V "Power Over Ethernet Injector" consume per day in Electrical Units (i.e.

How much Power would a 18V "Power Over Ethernet Injector" consume per day in Electrical Units (i.e. kW-h) , if left on for 24 hours ?

The product's .pdf file for the above product shows the following electrical specifications :

Ethernet Connectors :- RJ45 Jacks (2)
Ethernet Data Rate :- 10/100 Mbps Ethernet
No. of Ethernet Devices that can be powered :- Single
Data Lines :- Pair 1 : Pins 1/2
Pair 2 : Pins 3/6
Cat-5 Power (Poe) Pin Out (Spare Pair) :- +VDC: Pins 4/5
- VDC: Pins 7/8
Operating Temperature :- 0 C to 50 C
Max Ouput Power :- 30W
Nominal Output Voltage :- 18V (Typical)
Input - 205-255 VAC 50 Hz
IEEE 802.3 af Compiant :- Not applicable


The Adaptor that I am using along with this Injector has the following Details printed on it :

AC/DC Adaptor
Input - 100-240V AC 50/60 Hz
Output 12 Volt = DC 1 Amp


The Cable that has been provided by the ISP , has the following written on it :- "Duraconnect CAT -5e 4 Pair UTP 25 AWG UV Resistant PVC as per TIA/EIA 568 C.2 And IEC/ISO 11801" .

This Cable connects the ISP's connection to the "Power Over Ethernet Injector" & from the LAN socket of this injector , another cable (with same thing written) runs to my P.C. & gets connected to it .

I have attached the .pdf file regarding this Power Over Ethernet Injector that I was able to download from Telenet's website .

In case I am wrong in assessing which Injector I am using & in case , I am actually using Telenet's 12V Injector , in that case , what would be the Power consumption per day (if left on for 24 hours) ? The specifications of this product are as follows :

Maximum Output Power - 12W
Nominal Output Voltage - 12V (Typical)
Input - 205-255 VAC 50 Hz
IEEE 802.3af Compliant - Not Applicable



I am attaching the .pdf file for this product also, along with this email .

Please , kindly can you show the working ?

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