How to extend cable to Anchor to more than 100 m without additional power supply?
PoE Passthrough (sometimes depicted as PoE In/PoE Out) is an approach where small PoE extender unit can provide PoE input and several PoE Outputs without required external power adapter. This enables to prolong cable distance from network switch to anchor to several hundred meters.
One should always consider voltage drop among the cable once the anchors are daisy chained. Anchor consume maximally 2.5W. Here is a cable length calculator.
The second thing that need to be considered is what type of the PoE is used – Passive PoE or Active PoE?
There are different PoE Passthrough extenders for Passive PoE and (Active) PoE IEEE 802.3af/at.
- Mikrotik hEX PoE Passthrough extender. It is delivered only with 24V power source, please use 48V instead, recommended PN: GS36E48-P1J or GST36E48-P1J Meanwell.
- Passive PoE Passthrough extender
Note: Passive PoE Passthrough extender supports only 24V Passive PoE which is available only on Anchor 1.4. Sewio recommends using a 48V PoE power supply for cables longer than 50m.