Machinery Safety 101
16 May, 2018

Q & A: Category 2 and Testing Intervals

by Doug Nix
in Control Functions, Functional Safety, Interlocks, ISO 13849, Q & A /
2 Comments
Logical block diagram for ISO 13849-1 Category 2 architecture.
This entry is part 1 of 2 in the series Q&A

Dur­ing the Free Safety Talks that we did with Schmersal Canada and Frank­lin Empire, we had a “hot ques­tion” come up regard­ing Cat­egory 2 archi­tec­ture and the test­ing inter­val require­ment. The…

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15 May, 2018

Q & A: Can Safety PLCs be used for Lockout?

by Doug Nix
in Functional Safety, Hazardous Energy Control Procedures, ISO 13849, Lockout, Ontario, Q & A /
3 Comments
Disconnect Switch with Lock and Tag
This entry is part 2 of 2 in the series Q&A

The ques­tion of lock­out and the use of safety PLCs as a means to meet the lock­out require­ments comes up more and more fre­quently these days. Can Safety PLCs be used for…

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