Green DC OK LED indicates correctness of the power supply at the output. The power supply has internal short-circuit, overload, overvoltage and temperature protection.
  
Implementation
| Type | Current | Power | 
| ZI-75-12 | 6,25A | 75W | 
| ZI-120-12 | 10A | 120W | 
| ZI-240-12 | 20A | 240W |