25
UK
10.1.1 The safe state
The safe state is when the output is switched off (zero-current state: logic "0") of
min� one of the outputs (OSSDs)�
If one of the outputs is switched off, the subsequent safety-related logic unit must
bring the complete system into the state defined as safe�
10.1.2 The switched state
In switched state the receiver provides a current of 24 V DC (logic "1") to both
outputs�
Output characteristics
The output characteristics follow the characteristics of the input according to
IEC 61496:
Logic "1"
24 V DC
max� 400 mA
Logic "0"
≤ 1.5 V DC
< 0�2 mA
10.1.3 Interface classification
The interface of the devices complies with interface type C class 3 according to
the ZVEI position paper CB 24I Ed� 2�0
Identification key
Interface type
Suitable interface type
Source
C3
Receiver
C1
C2
C3