Cables - Siemens SIMATIC KP8 Operating Instructions Manual

Planning the use
3.7 Requirements for fail-safe operation
Signal duration
In order to assure accurate detection of the sensor signal by the HMI device, you must
ensure that the minimum duration for the sensor signal is adhered to. Refer to chapter
"Technical specifications (Page 84) ". The minimum duration is ensured by the usage of
push-to-lock emergency stop buttons.
3.7.3

Cables

The cables used must meet the following requirements:
● The unique assignment of terminals to sensors must be ensured.
● Cables laid outside of the switching cabinet must be laid separately in accordance with
Note
With the connection of an emergency stop button to the fail-safe channels of the HMI
device, the line lengths corresponding with chapter "Technical specifications (Page 84)"
must be complied with.
40
the relevant standards.
Use stable pipes or cable channels in order to avoid short circuits and cross-circuits.
Operating Instructions, 10/2010, A5E03284305-01
KP8, KP8F