Xinje XC Series User Manual page 67

Constitution of output
3
circuit
 For DC induce load, please parallel connect with commutate diode. If not
connect with the commutate diode, the contact's life will be decreased
greatly. Please choose the commutate diode which allow inverse voltage
endurance up to 5~10 times of the load's voltage, ordinal current exceeds
load current.
 Parallel connect AC induce load with surge absorber can reduce noise.
4 DC Load
5 AC Load