Device for monitoring a control unit

Details Device for monitoring a control unit Device for monitoring a control unit

1994-11-23

1996-01-30

Wong, Peter S.

Elevator, industrial lift truck, or stationary lift for vehicle

Having computer control of elevator

324202, 187277, 187280, 187393, B66B 500, B66B 1316

Patent

active

054874483

ABSTRACT:
The invention relates to a monitoring device for a control unit having a ety chain. In accordance with the invention, the monitoring device has a testable switching device which is provided with input and output terminals such that a monitoring loop may be set up from a plurality of testable switching devices and a sequence of digital signals can, in particular, be transmitted via this loop as a continuous signal so that a "digital stand-by current loop" is obtained.

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