CONNECTORS

1. Raspberry Pi GPIO interface: for connecting Raspberry Pi
2. Relay screw terminal: for connecting target devices
3. Relays
4. Photocoupler: PC817
5. Relay indicator

• LED on: relay NC is opened, NO is closed
• LED off: relay NC is closed, NO is opened
• Power indicator
• Relay control jumper

• short the jumper: control the relays by default I/Os used in the example code
• open the jumper: control the relays by custom I/Os through jumper wires

WHAT'S IN THE PACKAGE

• 1 x Raspberry Pi power relay board