Appendix
70
SOLID-4
Leuze electronic
DEUTSCH
E
NGLISH
FRANÇAIS
IT
A
LIANO
ESPAÑOL
N
EDERLANDS
12.4.1
Checklist for point of operation guarding
For a SOLID-4 Safety Light Curtain (resolution 14 mm to 40 mm), with normal approach to
the protective field.
This checklist is intended as a help tool. It supports but does not replace the inspection
before first startup or the respective regular inspections by an expert.
• Is the safety distance calculated in accordance with the valid formulas for
point of operation guarding, while taking the effective resolution and the
response time of the AOPD, the response time of a possibly used safety
interface and the stopping time of the machine into consideration, and has
this minimum distance between the protective field and the point of
operation been observed?
Yes
No
• Is access to the point of operation only possible through the protective field
of the AOPD and are other possible accesses protected by suitable safety
components?
Yes
No
• Is the protective field effective at each side and positively tested according
to Chapter 9.3?
Yes
No
• Is reaching-over, reaching-under or reaching-around the protective field
effectively prevented, e.g. by mechanical measures (welded or screwed)?
Yes
No
• Is unprotected presence between the protective field and point of operation
safely excluded, e.g. with fixed physical measures or with the control of
monitored physical components?
Yes
No
• Are transmitter and receiver fixed against displacement/turning after the
alignment?
Yes
No
• Are the protective device and the control devices in good, fault-free
condition?
Yes
No
• Are all connectors and connecting cables in fault-free conditions?
Yes
No
• Is the start/restart button for resetting the AOPD positioned outside the
danger zone in line with specifications and is it effective?
Yes
No
• Are the safety switching outputs (OSSDs), linked into the downstream
machine control unit in accordance with the required safety category?
Yes
No
• Are the downstream circuit elements controlled by the AOPD monitored by
the feedback circuit (EDM), e.g. contactors with positive-guided contacts or
safety valves?
Yes
No
• Does the actual integration of the AOPD into the machine control unit match
the circuit diagrams?
Yes
No
• Is the AOPD effective during the entire dangerous movement of the
machine?
Yes
No
• Is the dangerous movement stopped immediately if the supply voltage of the
AOPD is interrupted and is the start/restart button required to start the
machine again after the supply voltage returns?
Yes
No
