Nord Drivesystems SK 500P Series - Simple Re-Start Block

2 Function description
BU 0630 en-2020 21
Pos: 10 4 /Anlei tung en/El ektr onik/S afety /3. Fun ktio ns besc hrei bu ng/B eis piel e / R e alis ieru ng/Ei nf ac he W ieder anl au fsper re _01 @ 4 4\mod_1594730617062_388.docx @ 2645587 @ 3 @ 1
2.4.3 Simple re-start block
Category 4 as per DIN EN ISO 13849-1 can be achieved with direct dual-channel triggering of the
Safe Pulse Block using a safe switching element. The following illustrations show typical examples
with an emergency stop button (positively driven contacts, category 4).
Pos: 10 6 /Anlei tung en/El ektr onik/S afety /3. Fun ktions besc hreib ung/B eispi ele / R e alis ieru ng/Ei nf ac he W ieder anl au fsper re _02 [SK 500 P] @ 40 \mod_1574410758936_388.docx @ 2578260 @ @ 1
SK 510P, SK 540P
Emergency stop button Shielded cables
1)
Frequency inverter
1) Shielded cables to exclude faults as per DIN EN ISO 13849-2
SK 530P, SK 550P with SK CU5-STO or SK CU5-MLT
Emergency stop button Shielded cables
1)
Frequency inverter
1) Shielded cables to exclude faults as per DIN EN ISO 13849-2
or
Emergency stop button Shielded cables
1)
Frequency inverter
1)
Shielded cables to exclude faults as per DIN EN ISO 13849-2
Pos: 107 /A nleit ung en/El ek tr onik /Saf ety /3. F un ktio ns besc hrei bu ng/B eis piel e / R e alis ieru ng/Ei nf ac he W ieder anl au fsper re _03 @ 4 4\mod_1594731364124_388.docx @ 2645625 @ @ 1
To achieve safety category 4, fault exclusion as per DIN EN ISO 13849-2 Section D.5 must be
possible for the upstream components (hard-wiring and dual-channel button with independent,
positive-opening contacts). I.e., in this example, the emergency-stop button and the wiring must be
designed so that short-circuiting at the emergency-stop button and short-circuits to other live systems
can be ruled out.