Two-channel forked light barrier in Failsafe-design

摘要

a dual channel gabellichtschranke in failsafe design for the production of a schachtinformation in the field of floors for premature door opening on the arrival of the cabin has a cyclic dynamic self-monitoring (zdu, 6) by means of which a prophylactic fehlererkennu ng is possible.the zdu (6) is simulated at arrival and put a halt to the cabin floor real time periodically by optical circuit of the photocell a brief exchange of schaltfahne is simulated. this resulted in the interruption of relaisspeisung is shorter than the abfallzeit of relays, so that the intact circuit does not fall off.a sequential sequence of time signals (ta / b1 4, tvb) controls the operation of the selbstu00fcberwachungsfunktionen. in any komponentenfehlern is disturbed and it is via this process relaikontakte an appropriate response in the sicherheitskreisen the aufzugssteuerung. a cyclic test signal (tsa, tsb) newsletter is the primary control signal for simulated unterbru00fcche.