Connection for secure transmission of an analogue signal value

摘要

The circuit has two parallelly switched actuators (131,132) for independent adjustment of a value of the loop current (Is). The loop current assigns an error value corresponding the NAMUR (Group of German companies which create end-user standards for instrumentation and electrical devices used in industrial plants) NE043in case of deviation of voltage and loop current value over a threshold, by an actuator and by another actuator in the case of the loss of former actuator. A monitoring circuit assigns an error value corresponding the NAMUR-reference NE043 by latter actuator.