I have an RB200 with a 4 CM9 cards in it currently. I would like to replace 2 of the 4 cards with SR5’s. Can the RB200’s PCI slot support that much current draw? I’m using a 12V DC power supply plugged in directly (no POE).

It’ the Sparklan part that says 5V on datasheet - not SR5

If I read the specks on the SR5 correctly worst case is 4.65 Watts. I assume that I can use the RB11 with a SR5 since it is showing 5 Watt max. Is this correct? After reading Tulle’s comment on the RB14 I am thinking maybe I can use a RB14 with 2 SR5 cards, as long as I only put 1 card per LDO an…

We may offer a RB14 with a higher power LDO. But, the 50% of the power used by the cards will be wasted by the LDO to make the 3.3V. So the efficiency is ~66%. The PCI specs have 20W as the required 5V for the PC PCI bus. So, with four cards running at full speed, you will use 30W. Also, the RB…

maybe add external power source to sr-2/5 ? on the amp specs card could give us about 31dB output power at 5V (2,4GHz 11b) :shock: :shock: :shock: btw i have done some testing with two SR5 and two SR2 on RB 14 (same time of course) and all was working fine, but that was only test without any t…

Question 1) RB11 is it Ok for a SR5? Question 2) RB14 is it Ok for 2 SR5’s on different LDO’s and not use the other MiniPCI slots on the board.

You could also use a DC-DC converter(which is a switching regulator, as opposed to a linear regulator, and will run at closer to 100% efficiency), powered off of the 12 Volt PCI supply line, such as this one that costs about $40US… This would supply enough current for all four cards on an RB14… ht…

Thanks Hitek146 That was the info that I needed. Mike

I would try to change LD regulator… soon my result in this tread.. Regards

What about a external power mod to the RB14/18?

Super Range 5 in RB200

RouterOS Wireless Networking

hitek146 July 5, 2005, 11:13pm 17

Old topic…
http://forum.mikrotik.com/t/rb18s-and-such/2385/1