BK1120

BK1120 is a Beckhoff bus coupler in the BK EtherCAT Bus Couplers series. It uses the EtherCAT protocol for communication and operates at a baud rate of 100 Mbaud for high-speed fieldbus data transfer. Two RJ45 connections provide the physical bus interfaces. The fieldbus supports 1,024 input bytes and 1,024 output bytes for exchanging process data with connected devices.

The coupler supports up to 8,192 digital I/O points and 256 analog I/O points, accommodating systems with both discrete and analog signals. It can connect as many as 64 K-bus terminals, while its K-bus supply provides up to 1,750 mA for those terminals. The unit has a maximum current consumption of 500 mA.

A 24 VDC power supply powers the coupler. Its power contacts also operate at 24 VDC and carry up to 10 A for distributing power through the terminal assembly. The BK1120 installs on a 35 mm mounting rail for use in control cabinets. Its IP20 protection class guards against contact with hazardous internal parts and solid objects larger than 12.5 mm, but it does not provide water protection.