HB-37350-810-01-51F-EN SMX Installation manual.docx Page 92 of 234
Version: 50F
4.3.4.2.4 Two-channel switching relay output with external monitoring - group feedback
For safety related applications from Pl d acc. to EN ISO 13849-1 two relays on the SMX1xx
module and two external power contactors are used.
Fig.: Two-channel switching relay output with external monitoring – group feedback
The two external monitoring contacts are switched in series, supplied by the clock signal T1 and
read in from I01 (configured as EMU-input). In case of higher demands one must consider that at
least 1 switching process must take place every 24 hours.
Safety note:
• For achieving PI e acc. to EN ISO 13849-1 a sufficiently high testing rate is required.
• For applications with frequent safety shut-down requests these tests should be performed
more frequently, e.g. at the beginning of the shift, 1 x per week. However, a test should at
least be carried out cyclically 1 x year.
To Next Page
Loading...