https://www.beckhoff.com.cn/zh-cn/products/i-o/fieldbus-box-and-io-link-box/coupler-box/il23xx-bxxx-digital-combi/il2301-b901.html
IL2301-B901 | Coupler Box, 4-channel digital input + 4-channel digital output, Ethernet, 24 V DC, 3...
The IL2301-Bxxx Coupler Box module combines four digital inputs and four digital outputs in one device. The outputs handle load currents of up to 0.5 A...