CRS112-8P-4S-IN max for secondary power supply

Hardware MikroTik hardware general
1

Hello,

I need to buy a secondary PSU to deliver PoE to couple of devices in my home, just bought a CRS112-8P-4S-IN.
( devices including couples of pis powering their own SSD through USB if possible. + extra, AP … )

in the manual :


With the included 28 V PSU the max power output of each Ethernet port in this mode is 1 A, the total maximum for all ports is 2.8 A. At 802.3af/at high
power mode the max power output is 450 mA per port, total max 1.4 A.

The MikroTik 48V 2A 96W part seems a bit pricey.

I condisder then buying this, but then I saw this : 48V 3A 120W , or even this : 48V 5A 240 W

My question is, is 48V 2A 96W the maximum for the secondary PSU ?

Will it handel 3A or even 5A ? How about 57V ? Any upsides ?

2

You can use power adapter with higher power output (more amperes), but it won’t be useful … grand total output current is (as stated) 1.4A, add switch’s own consumption.
You can use adapter with higher voltage (e.g. 56V), wich will yield slightly higher power with same current.

3

Thank you