BK4500 | Interbus Bus Coupler with fibre optic interface

The particular feature for the BK4500 Bus Coupler is its fibre optic connection. Its functions correspond to those of the BK4000 Bus Coupler in relation to the Bus Terminals and the fieldbus properties. The fibre optics mean that the transmission is particularly safe from interference, and has absolute electrical isolation.

After a conversion from copper cable to fibre optic the BK4500 Bus Coupler can be used at any location in the ring. An RS422 or fibre optic converter can be plugged into both of the interfaces of the BK4000 Bus Coupler. The interfaces on the Bus Coupler provide the necessary 5 V voltage. If the BK4500 is the last slave in the fibre optic ring, the signal relay switch must be switched on.

Complex signal processing for analog I/Os, position measurement, …

The BK4500 Bus Coupler supports the operation of all Bus Terminals. As far as the user is concerned, handling of the analog inputs/outputs is not different to other series. The information is available in the process image of the controller for processing in the form of a byte array.

The analog and multi-functional Bus Terminals can be adapted to each specific application using the KS2000 configuration set. Depending on the type, the analog Bus Terminals' registers contain temperature ranges, gain values and linearisation characteristics. With the KS2000, the required parameters can be set on a PC. The Bus Terminals store settings permanently and in a fail-safe manner.

Optionally, the Bus Terminals can also be controlled by the control system. Via function blocks (FBs), the programmable logic controller (PLC) or the Industrial PC (IPC) handles configuration of the complete periphery during the start-up phase. If required, the controller can upload the decentrally created configuration data in order to centrally manage and store this data. Therefore, new adjustments are not necessary in the event of replacement of a Bus Terminal. The controller automatically sets the required setting on power up. This functionality is achievable through the use of the KS2000 software.

The Interbus coupler works with the protocol chip SUPI3 and supports the extended diagnostics of the Interbus master. Byte-by-byte addressing in the master is supported as from generation G4.