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mozerd
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CRS112-8P-4S-IN believe it or not

Fri Mar 19, 2021 12:13 pm

Recently I acquired for a client the subject switch. Much to my surprise a very important component was missing.
The missing component is the secondary DC jack on the back of the enclosure that supports 48-57 V power supply

https://mikrotik.com/product/crs112_8p_4s_in
CRS112-8P-4S-IN is an eight Gigabit RJ45 port PoE switch, that offers different power output options: autosensing 802.3af/at PoE/PoE+ and Passive PoE, and four SFP ports provide optical fiber connectivity options to support uplinks of up to 1 Gbps.

CRS112-8P-4S-IN is equipped with 12 independent switching ports. 28 V 3.4 A power supply is already included in the box. There is secondary DC jack on the back of the enclosure that supports 48-57 V power supply (not included, can be purchased separately - product codes 48POW (1.46A 70W) and 48V2A96W (2A 96W)). CRS112-8P-4S-IN can power 802.3af/at devices if 48-57 V DC input is used (unit will automatically detect and provide correct power to devices). Max current is 1 A per port if input voltage is 18-28 V, 450 mA if 48-57 V. Total limit is 2.8A@24V and 1.4A@48-57V. PoE-Out is passed over mode B 4,5 (+) and 7,8 (-) pins
How did I find out: I received the CRS112-8P-4S-IN from ISPsuplies [Ottawa Canada] -- set it up to test. After configuration I plugin a Unifi UAP-AC Pro into port 1 and it would not light up obviously the wrong power --- so I then proceeded to order the 48V2A96W power supply --- but where do I plug it in ??? ... so I read the description quoted above and looked for the secondary DC jack on the back of the enclosure that supports 48-57 V power supply .... MUCH to my surprise no such component was present Believe it or Not.

Following is picture of what the backside of the CRS112-8P-4S-IN should look like .... mine does not look like that at all.
missing.GIF
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erlinden
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Re: CRS112-8P-4S-IN believe it or not

Fri Mar 19, 2021 1:08 pm

Seeing is believing....what does it look like?
 
mada3k
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Re: CRS112-8P-4S-IN believe it or not

Fri Mar 19, 2021 1:36 pm

Mine has two DC-jacks. Have it simple gone missing in production?

You should ofcourse send it back to the supplier.
 
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mozerd
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Re: CRS112-8P-4S-IN believe it or not

Fri Mar 19, 2021 4:12 pm

Seeing is believing....what does it look like?
Here is the unit I received look like:
front.gif
back.gif
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erlinden
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Re: CRS112-8P-4S-IN believe it or not

Fri Mar 19, 2021 4:18 pm

You have a CRS112-8G-4S-IN: https://mikrotik.com/product/CRS112-8G-4S-IN
This is a non PoE switch, at least...it can be powered by passive PoE

So...I believe it ;-)
 
mada3k
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Re: CRS112-8P-4S-IN believe it or not

Fri Mar 19, 2021 5:50 pm

Yes, thats the older non PoE(out)-version.
 
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Znevna
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Re: CRS112-8P-4S-IN believe it or not

Sun Mar 21, 2021 1:51 am

Your topic is named CRS112-8P, yet you provide a picture with the device that has written on it CRS112-8G, notice anything wrong here?
What's the topic about ? you failing to read labels? lol.

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