Parallel bus and electronics unit

The electronics units are of plug-in design and are mounted in equipment racks with a standard size of 19 inches 6U (1U = 44.45 mm).

This rack can be divided into 21 standard partitions.

The data exchange via the parallel bus B448C is controlled and monitored by all available devices.

The protection system is based on a data bus with digital signal processing for most functions;

signal conditioning, analog and digital inputs, A/D conversion, processing and signal output.

The components of the system include

– Static plug-in units, which exchange data via a powerful parallel bus

– Interfaces to the process (main system, station equipment), isolated from the digital processing unit.

Device rack 216MB66/216MB68 and parallel bus B448C

The main features of the parallel bus B448C are

– Specification based on IEEE P 896 (Future Bus)

– Time multiplexing of address and data (16 bits)

– Asynchronous data transfer with handshaking

– Integrity check for each data exchange

– Up to 32 masters with the same status actively access the bus

– Internal 24 V auxiliary power supply common to all electronics units;

redundant 24 V power supplies are available.