RouterBoard N card power issues

This page is a work in progress, describing the steps people have taken to resolve power issues related to the 'new' Mikrotik R52hn and R52n cards. Please add your experiences and solutions to the problems here.

• PLEASE BE AS SPECIFIC AS POSSIBLE* - mention at least the following:

* rb type
* RouterOS version
* the number of cards
* the type of cards (R52/R52n/R52hn/XR71 etc)
* the power supply (POE/Direct DC)
* If using POE
  * cable type (Cat5e normal/shielded/Cat6 etc)
  * distance between injector and rb
* measured voltage
  * at supply
  * at RB
* how many RBs on the same power supply

The Problem

A typical Mikrotik | RB433 will quite happily power 3 | R52 or equivalent cards on a standard 18v 0.5A POE injector over more 30m or more of Ethernet CAT5e cable.

| RB433AH | RB493AH

| R52 | R52hn | R52n