HB-37420-810-01-25F-EN SMX100 Installation manual.docx Page 86 of 260
Version: 25F
4.2.1.4.4 Dual-channel sensor with time-out and cross-shorting test
Cross-shorting as well as connections to DC 24 V and DC 0 V can be detected by using two
independent clock signals on the homogeneous sensor.
Pl d or higher acc. to EN ISO 13849-1 can be achieved when:
- Use of sensors/switching elements with forced actuation.
- Use of 2 sensors/switching elements with independent manipulation
- dto. However with actuation via a common actuation device in connection with an error
exclusion for this device.
Figure: two-channel sensor, homogeneous with clock
Safety note:
• Pl d or higher in accordance with EN ISO 13849-1 is achieved by using switching
elements / sensors with positively actuation
• When using two independent sensors with independent actuation, PI d or higher acc.
to EN ISO 13849-1 can be achieved.
• When using common elements in the actuation chain, an fault exclusion is required for
this purpose. The corresponding limitations and criteria acc. to EN 13849-1 must be
observed.
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