Quantity   Component name
1 × Raspberry Pi 4
1 × DQ5rly I2C-HAT Raspberry Pi I/O Module / I2C / 5 Relay Outputs
2 × DQ10rly I2C-HAT Raspberry Pi I/O Module / I2C / 10 Relay Outputs
1 × DI16ac I2C-HAT Raspberry Pi I/O Module / I2C / 16 Digital Inputs
1 × DIN Pi Case Raspberry Pi and HATs enclosure / DIN Rail
4 × DIN Pi Case Extension HAT case / DIN Rail