★DC24V Input power. ★The case adopts closed structure which can avoid improper intrusion of foreign objects and has high safety. ★The RUN/STOP current adopts digital circuit, and the accuracy of current adjustment is high. ★With self-test and TIMING functions, it is easy to check and use. ★The internal self-resetting fuse can provide complete protection even if the positive and negative polarities of the power supply are connected incorrectly.