HB-37350-810-01-51F-EN SMX Installation manual.docx Page 90 of 234
Version: 50F
4.3.4.2.3 Single-channel switching relay or semi-conductor output with dual-channel external
circuit with testing
For safety applications from PL C after EN ISO 13849-1 it is recommended, or demanded to
access two external switching off elements. For reaching error of PL c or higher, a device for
testing the complete chain and a notification/warning device is further required when an error is
recognized - for this see notes under 0.
Fig.: Single-channel switching outout Q1_PP with dual-channel external circuit and monitoring
at output 13 1 as group feedback
The two external monitoring contacts are switched in series, supplied by the clock signal T1 and
read via input 13. Input 13 was chosen as readback input, but any other input can be assigned for
this purpose.
To Next Page
Loading...