BK4020
The Beckhoff BK4020 from the BK EtherCAT Bus Couplers series is a high-performance industrial automation interface that supports up to 64 bus terminals (extendable to 255 with K-bus extension) and handles 512 digital I/O channels alongside 32 analog I/O channels. It delivers a 500 kbaud data rate over LiYCY 3×2×0.22 mm² cable and features dual screened, vibration-locked 9-pin D-sub bus interfaces. Powered by 24 V DC (–15 %/+20 %) with a module input current of 70 mA plus K-bus share (max 500 mA), it offers power contact ratings of max 10 A at 24 V DC and recommended fuse ≤10 A. Engineered to EN 61000-6-2 immunity and EN 61000-6-4 emission standards, with operating temperatures from 0 °C to +55 °C and storage from –25 °C to +85 °C, the BK4020 ensures reliable, real-time data exchange in rigorous industrial environments.