https://www.electronicdesign.com/technologies/power/whitepaper/21259954/electronic-design-high-speed-dual-channel-digital-isolator-offers-optocoupler-alternate
These 8-pin narrow-body devices provide rugged isolation up to 4,000 V (peak) and 2,830 V (rms) for 100-Mb/s digital signals.
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https://www.banggood.com/5Pcs-A87-4-Channel-Optocoupler-Isolation-Module-High-And-Low-Level-Expansion-Board-p-1264794.html
Only US$12.99, buy best 5pcs a87 4 channel optocoupler isolation module high and low level expansion board geekcreit for arduino - products that work with...
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https://www.tinytronics.nl/nl/schakelaars/optocouplers/optocoupler-isolatie-module-2-kanalen
Optocoupler Isolatie Module - 2 Kanalen - ISOBOARD2CH - Optocouplers - Optocoupler module met 2 kanalen om schakelingen optisch te isoleren. Dit kan...
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