Mikrotik1100AHx4, 2-pin terminal input Voltage -48, 12-57 V ?

RouterOS General
1

I know that 12-57V means my Mikrotik_1100AH×4 can accepts DC voltage from 12 to 57 Volts, but I got confused, what meant by -48 ?

Please can I connect my router to 12 Volts battery safety ?

2

The device also has a terminal block for Telecom -48V DCsupply or any other DC supply in 24-57V range.
https://mikrotik.com/product/rb1100ahx4#fndtn-downloads

3

Sorry, but what that means? I did not get the point.
My MikroTik is written on it 12-57; -48

4

https://mikrotik.com/products
Search for telecom power supply…

5

Aha, there is power supply called telecom -48 DCsupply , which have 48Volts under zero “negative voltage”, used to supply some telecom devices.

Thanks.

6

Not some, it’s most telecom devices. And reversed polarity has to do with power terminal corrosion which doesn’t happen as much if supply voltage is negative (relative to earth/chasis/…). Not that positive pole is connected to earth/chasis …

7

In any case, don’t get confused and just follow the polarity marked next to the connector pins, in the whole range from 12 to 57 V DC.

8

Thank you all :slight_smile:

9

Sindy, At first glance I felt you mean me by your signature, :laughing: