HB-37420-810-01-25F-EN SMX100 Installation manual.docx Page 116 of 260
Version: 25F
4.3.5.2.2 Wiring single-channel with testing
When using a two-channel output (IQQx) in connection with a single-channel external wiring with
testing. 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.
Furthermore, a message/warning device for indicating a failure is required. 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 EN ISO 13849-1 can maximally
be achieved!
Fig.: Two-channel output with single-channel wiring 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...