Farnell G24-10A PSU - current-limit modification

I have an old Farnell G-series switched-mode PSU, type G24-10A (240 watt, 24V 10A) and it shuts down completely when the current drawn from it reaches the limit threshold. The original spec sheet for the PSU suggests that the normal behaviour is to enter a constant-current mode when the current-limit is reached. I seem to remember that there was a modification that could be done to these units to select whether they shut down or gave constant-current but I can't find any reference to this anywhere. I no longer have any instruction manual for the unit, either.

Can anyone think back a few years to remember anything about this and, more importantly, how to change the current-limit mode? Thanks!

Reply to
Edenyard
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"Edenyard" wrote

If it's like the 120W units, there's an option to shut down after 200ms of overload (option C). To disable this, fit a link across C5/R7 (22µ/56k on the 120W) on the output board. Hope this applies to your unit.

Reply to
Jules

Many thanks for that. The 240W unit doesn't have component references C5 or R7 on the control PCB, but there's a 56K (R27) in parallel with a 22u 16V tantalum (C12), so I tried linking across that and hey presto! No more shutdown.

Thanks again,

Ed.

Reply to
Edenyard

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