NF DP420LS Instruction Manual page 195

4. Advanced Operation
 Operation procedure
1. Press the MENU key to move to the root menu, then select [System]. The system setting
window opens.
2. In the [Relay Cntrl] item, select [2:Enable] or [1:Disable]. If you select [Enable], the activation
of the output relay is enabled. If you select [Disable], the output relay is fixed to the on state
and the operation to turn the output on/off is performed by the semiconductor device rapidly.
176 PROGRAMMABLE AC POWER SOURCE