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CSI Bench Psu CC Mode Kit
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CSI Bench Psu CC Mode Kit

Price: £22.99

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A complete kit to convert CSI 3000 series bench power supplies to off-load CC (constant current) adjustable setting.

The standard functionality of these CSI power supplies is that the user cannot change the CC (constant current) setting without actually running at load, which makes it impossible to preset a control current.

This easy to fit kit allows the user to use the existing front panel buttons (UP/DOWN) to change the CC setting at any time on the LCD, on or off load.

All the parts are supplied to retro fit this kit to your own power supply and include:

  • Fully assembled & tested Pcb (from my own workshop).
  • Plastic standoffs.
  • Connectors & solder tails.
  • On-board LED provides functional status.

Tested with my own CSI3003X5 & CSI3005XIII power supplies, but may possibly be used (subject to your testing) in other CSI and other similar branded power supplies.

Note: Dual channel CSI power supplies, such as the CSI3005XIII require two kits, one per channel.

The kit is fitted simply by snapping it onto plastic standoffs (existing holes within the PSU) and plugging it in. All thats then required is just the soldering of three wires to specific points on the existing control board inside the PSU.
No drilling of any holes, no cutting of any wiring or Pcb traces etc is necessary. I've made this as easy as possible to install. See the video & photos below which provide all the necessary info for installation.

The kit does not require any calibration (on the above power supplies anyway), but does has the facility to tweak the display by way of an on-board potentiometer if required. Note: By default this pot is turned all the way up for standard installation.

Additional info:

  • TR1 potentiometer - Adjusts full scale of CC set display. Normally set to fully clockwise.
  • JP1 jumper - To manually set LCD to display CC Mode Set. This is for testing only.
  • Each one tested with my own CSI3003X5.
  • Please refer to the YouTube video here for full installation instructions. No written instructions are shipped with the kit, it's all in the video.
  • This kit involves opening up your PSU and making some light modifications. It may invalidate your warranty.
  • As featured on Hackaday !

Pcb's now being shipped are V1.11 (no difference to that in video except slight adjustment to the track layout, and a dimmer LED being fitted. I am also giving the boards a conformal coating for protection. Everything else including fitting is identical.

UPDATE 15/03/14:
Pcb's now being shipped include a new op-amp for better CC performance when set less than 50mA.

Electronics can be dangerous, so if you are not experienced or have any doubts at all then ask somebody who is to help you fit this kit. You can also email me via the contact form on this site in advance of your purchase if you have doubts. Again, electronics can be dangerous so please take care.
I have tested this kit with my own CSI3003X5 & CSI3005XIII power supplies, but I cannot be responsible for any changes CSI have made between models and any incompatibilities that may result. I also cannot guarantee that other CSI like power supplies will work.

Here's a video detailing the installation in full - http://youtu.be/KCZl3jnqxAw

And some additional photos (Pcb V1.1):

Topside of the board. All SMD components:



Underside of the board. Relay, connector tails and plastic standoffs visible:



Close-up of the PSU control board showing the positions of the 3 wires to be soldered up:



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Customer Reviews:

CrouchyUK  (Saturday, 05 April 2014)
Rating: 5
Superb solution! Makes you wonder why it never came like this to start with TBH. Thanks again!

briant33  (Saturday, 08 February 2014)
Rating: 5
Neat little upgrade! Easy to install and works great.

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Can't set the CC setting on your CSI Psu whilst off-load?
Get the CSI Bench Psu CC Mode Kit. Click HERE.

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