11
UK
9 Operation
9.1 Switching state of the outputs
9.1.1 The safe state
The safe state is when the output is switched off (zero-current state: Logic "0") of
at least one of the outputs OS1 or OS2 (OSSDs)�
If one of the outputs OS1 or OS2 is switched off, the subsequent safety-related
logic unit must bring the complete system into the state defined as safe�
9.1.2 The switched state
If the coded actuator is in the enable zone and if there is no sensor error, both
outputs OS1 and OS2 (OSSDs) are enabled (logic "1")�
9.1.3 Cross fault / short circuit
• A cross fault between both outputs (OS1 and OS2) is detected by the fail-safe
sensor and results in the outputs (OSSD) being switched off� The outputs OS1
and OS2 remain switched off until the error has been removed or a voltage
reset has been carried out�
• A cross fault (short circuit) between one of the two outputs (OS1 or OS2) and
the supply voltage results in the other output (OS2 or OS1) being switched off�
9.2 Interface classification
The interface complies with interface type C class 2 according to the ZVEI position
paper CB24I Ed� 2�0�
9.2.1 Identification key
Interface type
Suitable interface type
Source:
C2
Receiver:
C1
C2
