Although the DNO does not have an under voltage protection cut-off fitted as standard it is easy to retro-fit this feature. There are two ways to do this;
Method 1; the easiest, is to cut the fuse link F1 [page 4 of the manual] and fit a 500mW zener diode fitted between the 2 adjacent holes. The zener voltage Vz is given by Vz = Vco -4 where Vco is the desired cut-off voltage. For example to achieve a 40V cut off fit a 36V zener diode. The bar of the diode should be to the right hand side as seen on page 4.
Note: Method 1 is not suitable if the DNO brake driver socket is to be used, if this is needed then method 2 should be used.
Method 2; the same value zener diode should be used as in method 1 but it should be fitted to the terminals shown below. The track indicated by the arrow should be cut.
If you have found this article useful please share it to help others discover it