HB-37350-810-01-51F-EN SMX Installation manual.docx Page 65 of 234
Version: 50F
4.2.1.4.3 Dual-channel sensor without timeout with cross-shorting test
Faults are at least detected when requested. The DC is medium and by using cyclic tests
(start test, operational/organizational tests) can be changed up to high level. depending on the
test frequency.
Only normally closed contacts should be used for safety related applications.
PI d acc. to EN 13849-1 can be achieved when using sensors / switching elements with fault
exclusion for not opening the switch contacts. This is permissible when using positively
disconnecting switches with correct constrained actuation. The use of sensors with self-
monitoring output contacts is also permitted.
Pl e in accordance with EN ISO 13849-1 can be achieved when using sensors / input
elements with sufficiently high MTTFd in connection with temporal plausibility monitoring and a
sufficiently high change of the switching state = dynamic testing.
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