HB-37350-810-01-51F-EN SMX Installation manual.docx Page 89 of 234
Version: 50F
Safety note:
• Not recommended for safety applications! In this context see also the notes in EN ISO
13849-1 concerning the application and the required fault exclusions.
4.3.4.2.2 Single-channel switching relay or semi-conductor output with external switching
amplifier and testing
When using external switching amplifiers or downstream electro-mechanical, pneumatic or
hydraulic components, the setup for testing the complete chain and a message/warning feature
for detected faults is required in order to achieve PI c or higher.
Positively guided auxiliary contacts are especially needed for electro-mechanical devices and
message contacts for the valve position are required for hydraulic or pneumatic components.
The message/warning device must ensure that the operator recognizes the dangerous situation
immediately.
The achievable PI is mainly depending on the test rate, PI d acc. to nach EN ISO 13849-1 can
maximally be achieved!
Fig.: Single-channel relay output with testing
Safety note:
• Only conditionally recommended for safety applications! In this context see also the notes
in EN ISO 13849-1 concerning the application and the required fault exclusions.
• For PI c or higher a test rate of > 100 * the request rate is required.
• For PL c and higher a message/warning feature is required, which informs the operator
immediately about a dangerous situation
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