PROCESS CONTROL HARDWARE
I2CBUS-08 8-Channel Relay Board
An optically isolated 8-channel SPDT switching interface driven over standard I2C, selectable for 3.3 V or 5 V logic. Contacts rated 120 / 250 V AC at 12 A, rated -40°C to +70°C. Built for machine automation, test benches and embedded microcontrollers.
At a glance
| Part number | I2CBUS-08 |
| Relay channels | 8, SPDT |
| Isolation | Optical, between the I2C side and the relay side |
| Interface | I2C |
| Supply voltage | 3.3 V or 5 V DC |
| Contact rating | 120 / 250 V AC @ 12 A |
| Operating temperature | -40°C to +70°C |
| Current consumption | 1 A maximum, all eight relays energised |
| Bus connection | 3V3, GND, SDA, SCL screw terminal |
| Addressing | 3-position DIP switch (A1, A2, A3) |
| Relays | CIT Relay & Switch, UL and CE marked |
| Status indication | Per-channel LED |
Every channel carries its own indicator LED, so the state of the board is readable at a glance without a meter. The three-position address switch allows several boards to be daisy-chained on a single I2C bus, and each relay brings its contacts out to a pluggable screw terminal.
Comparable off-the-shelf relay boards exist, but they are not built to keep working in an industrial environment. This board is.
Building a control panel?
Tell us what you are switching, at what voltage and current, and how many points you need. We will tell you whether the I2CBUS-08 is the right board.