HB-37420-810-01-25F-EN SMX100 Installation manual.docx Page 108 of 260
Version: 25F
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
To Next Page
Loading...