Arrangement for protected data output

Abstract

Abstract 1. Arrangement for the protected data output by means of relays in redundant two-channel process controls with comparisons and with the use of fail-safe circuitry, characterised by two data processing channels (1, 2) for the transmission of like data telegrams containing addresses and output data, each channel being associated with a respective store (3, 4) for the storage of the addresses, with a first fail-safe comparator (5), which being controlled by a fail-safe mono-flop pulse transmitter (6) compares the addresses, with a respective store (7, 7') for each data processing channel for the storage of the output data, the contents of which are compared by a second fail-safe comparator (16), an output amplifier (9), which is connected through a decoder (8) with the one store (7) and to which the relays (A1 , n) to be controlled are connected, a recoder (11), which receives the output data from the output amplifier (9) and conducts them through a store (12) for the storage of the comparison data to a third fail-safe comparator (13), which compares the comparison data with the output of the second data processing channel (2) and is controlled by a fail-safe mono-flop pulse transmitter (14) acted on by the first data processing channel, and that the fail-safe clearing circuit (15) is connected with the first, second and third fail-safe comparator (5, 16, 13).

Inventors

• 👤 Alfred Ing. Grad. Lotz
• 👤 Harri Dipl.- Ing. Brauer

Bibliographic Details