Power supply Extreme Networks ps2336-ye - how to use it? - Page 1
Forum section: electronics / projects

author: el737
author_rank: Newbie
timestamp: September 29, 2021, 01:41:42 pm
content: Hello,I have a chance to get the power supply Extreme Networks ps2336-ye really cheap. It should provide (depending on the mode) up to 48V / 24A, which would be perfect to use with a DIY CNC machine. In any case, too good to throw away.Now... When I plug in the power, I get 18V on the big terminals on the sides, but I don't know what kind of signal and on which pins it expects, in order to change this voltage (or mode).Since I am not an expert in these things, does anyone have an idea how to make it work? I couldn't find any info about it on the forum, or the internet.Sorry for the lack of information, I guess I'm just hoping to find someone who already did exactly this

author: eblc1388
author_rank: Frequent Contributor
timestamp: September 29, 2021, 02:53:24 pm
content: The following are the steps one can try to power ON unknown power supply. You will need to prepare two 100R resistors for use in step (3) and (5) below.Refer to the attached image and the notation of the terminal pins:1. Locate the GND pin(s). With the Power Supply(PS) un-powered, use the lowest resistance(200 ohm) range of a DVM to test if any of the big and small pins are connected to the metal casing. The black meter probe should be connected to metal casing and check each contact pin(P1, P2, A1~D6) with the red meter probe one by one. Record your results in a list for any pin with near zero resistance.2. Look for a relatively short contact pin among A1~D6, this is possibly the "PS_KILL" pin.3. Connect this "PS_KILL" pin via a 100R resistor to one of the pin(s) identified in (1) above. Ensure a good connection.4. Connect AC power to power supply, with DVM measure voltage between P1 & P2 contacts. Identify whether P1 or P2 is negative. Keep the DVM connected for voltage reading.5. Use the second 100R resistor, with one end connected to the GND pin identified in (1), touch the other end of the resistor to rest of the pin A1~D6 one by one. With luck, on a particular pin the power supply will turn fully ON. This is the "PS_ON" pin. Confirm 48V on the DVM and possibly a change of cooling fan speed.Report back the results.

author: el737
author_rank: Newbie
timestamp: October 04, 2021, 06:29:01 pm
content: THANK YOU!This was exactly the procedure I was looking for. I've seen it once for another power supply, but I can't find it anymore, and it was not so precise as this one. It took less than 5 minutes to find the right pins, and to fully start the PSU. Without load it gives me 49V. I have to test it with the machine and see if it has any problems running 10-12A.Here is the updated image with the important pins marked.So, one 100R goes between one GND and PS_KILL, and the other between GND and PS_ON:

author: eblc1388
author_rank: Frequent Contributor
timestamp: October 05, 2021, 07:23:27 am
content: Thanks for letting us know the method works.Now you have identified the pins, I'm glad to let you know, that once those pins are identified, in most cases you can leave out the 100R resistors afterwards and shorting the relevant pins directly to GND to startup the supply. I suggested using 100R resistor because there is a risk one could have shorted the auxiliary power output to GND instead.A toggle switch which short PS_ON pin to GND pin will let you turn ON/Off the power supply 48V output manually with mains connected.The AUX power output for this power supply is 12V 4A among pin A1~D6 and most probably adjacent to the GND pins. You might be able to use it for some other purposes too.

author: vik007
author_rank: Newbie
timestamp: November 25, 2024, 06:55:59 am
content: I started this switching power supply model according to the scheme above (PS_KILL and PS_ON to GND), it works perfectly in the maximum load at 49.9 volts.I did not use 100 ohm resistors.--------------------------------------------------------------------------------------------Am pornit acest model de sursa de alimentare in comutatie dupa schema de mai sus (PS_KILL si PS_ON la GND ) , functioneaza perfect in sarcina maxima la 49,9 volti.Nu am folosit rezistente de 100 ohmi .