Four-digit solid state relay also refers to four-channel solid state relay board.

Main functions:

As for PLC control circuit and control contact circuit, perform photoelectric barrier to reach effect of independence of each other so as to ensure safety of control system.

Lead -14VDC that DC module generates into control circuit, load of DC module power is reduced in this respect. On the other hand, contract’s requirement for power at closing/opening is ensured in another respect. Fault rate of control circuit is reduced at the same time.