DI820 ABB Digital Input Module for Automation Systems

Description

The ABB DI820 Digital Input Module is a robust I/O unit designed for ABB AC 800M controllers and the S800 I/O system. It provides 8 individually isolated input channels capable of reading both AC and DC signals, making it versatile for a wide range of industrial applications. Each channel features current limiting, EMC protection, optical isolation, and input state LEDs, ensuring safe and accurate signal acquisition. The module also includes voltage supervision capability: channel 1 can supervise channels 2-4, and channel 8 can supervise channels 5-7. If the supervision voltage disappears, error inputs are triggered, and a warning LED alerts operators. This makes the DI820 especially valuable in critical process industries where reliable digital input monitoring is essential.