Sequent Microsystems The 8-RELAY card is a stackable expansion card for Raspberry Pi B+, 2, 3, 4 and Zero. It offers a compact and inexpensive solution for adding up to 64 relays to a Raspberry Pi project.
Limits! This card can switch 120VAC/4A (24V if DC). If you need to switch higher voltages/currents, the 4-relay card is rated to 250VAC/10A.
The 8 Relay is 8 level stackable, yielding a total of 64 relays in one stack. You can also create a stack with up to 4 MegaIO and up to 4 more 8Relay cards.
Two of the Raspberry Pi’s GPIO pins are used for I2C communication, leaving 24 GPIO pins available for the user.
8-RELAY adds the following I/O functions:
- Eight on-board relays
- Eight later stackable: add up to 64 relays to your Raspberry Pi
- Command line, python drivers
- Relay limits (due to PCB construction)
- Relay max current/voltage: 4A/120VAC (24V if DC)
- Power requirements
- 10 mA @ +5V (all relays off)
- 750 mA @ 5V (all relays on)
- 8 Relay board
- Mounting hardware and jumpers
- Relay connector plugs