This shield uses SONGLE relay, providing 4-channel input and output. The relays are isolated in the PCB. All the channels can control up to 24V DC or 250V AC on 10 A. It allows you to control high power components like lights and motors via Raspberry Pi 3. Just plug it directly into your pi with 5 V. You will find a LED indicates the status of the relays.
Control Signal: TTL Level
Rated Current: 10A(NO) 5A(NC)
Max Switching Voltage: 250VAC 30VDC
Contact Time: under 10ms