Connection Of Safety Switches In Series - SICK T4000 Serie Instrucciones De Servicio

Operating Instructions
T4000 Direct Unicode

WARNING

WARNING
Note
© SICK AG • Industrial Safety Systems • Germany • Subject to change without notice • 8012206/UC32/2010-11-15
Electrical connection
To ensure safety, it is imperative both safety outputs
(OA and OB) are evaluated (see Fig. 7).
Prevent the formation of a potential difference between
the load and the protective device!
 If you connect loads that are not reverse-polarity
protected to the OSSDs or the safety outputs, you must
connect the 0 V connections of these loads and those of
the corresponding protective device individually and
directly to the same 0 V terminal strip. This is the only
way to ensure that, in the event of a defect, there can
be no potential difference between the 0 V connections
of the loads and those of the corresponding protective
device.
5.6.2

Connection of safety switches in series

A maximum of 20 T40-E01 safety switches can be
connected in series. The switches are connected together
using special T-plug connectors (T40-A2191N) and the
termination connector (T40-A3191N).
 Connect safety switches as in Fig. 8;
Pay attention to the transition resistance at the connect-
ions.
5
Chapter
159