Allan Hill, NZIE col­umn

DEMM Engineering & Manufacturing - - CONTENTS -

Ma­chine safety stan­dards up­dates; AS/NZS 4024 – Safety of ma­chin­ery, de­sign of safety re­lated parts of con­trol sys­tems, gen­eral prin­ci­ples for de­sign.

With re­gard to ma­chine safety, pre­vi­ously the Depart­ment of Labour has com­mented that you have “taken all prac­ti­cal steps” in your en­gi­neer­ing safety de­sign if you used the Aus­tralian stan­dard AS4024. It is de­bate­able if this would stand up in a court of law.

Many ma­chine de­sign­ers are not fol­low­ing the cor­rect process for de­ter­min­ing the re­quired per­for­mance level re­quire­ment (PLr) of their safety rated elec­tri­cal con­trol sys­tem (SRECS) and requesting val­i­da­tion and ver­i­fi­ca­tion, af­ter the ma­chine has been placed into ser­vice and in some in­stances af­ter an in­ci­dent or ac­ci­dent with the ma­chine that has been up­graded.

The NZEI sec­re­tary/man­ager has been driv­ing the adop­tion of AS 4024 as a joint AS/NZS since 2011.

Now with the sup­port of some high pro­file com­pa­nies, the form­ing of AS/NZS 4024 as a joint stan­dard is hap­pen­ing. The sec­re­tary/man­ager is a com­mit­tee mem­ber of spe­cial func­tions com­mit­tee 041 (SF-041) who are re­view­ing and rewrit­ing 26 sec­tions of AS/NZS4024.

AS1755, the con­veyor safety stan­dard is also be­ing rewrit­ten and will form a sec­tion of AS/NZS 4024. Var­i­ous re­vised parts of AS/ NZS 4024 was pub­lished on the 30 June 2014.

A meet­ing of the Main Com­mit­tee SF-041 was held on Wed­nes­day 4 June 2014 in Mel­bourne.

The pur­pose of the meet­ing was to dis­cuss the ap­pli­ca­tions guide for the AS 4024.1 Se­ries, the con­veyor projects for the AS/NZS 4024.3 Se­ries and other cur­rent projects, in­clud­ing re­ports on re­cent in­ter­na­tional meet­ings at­tended by the chair­man of the SF-041 com­mit­tee Frank Schr­ever.

Schr­ever has been mem­ber SF 041 for AS 4024 safety of ma­chin­ery se­ries since 1999, he is now chair­man. He is also the Stan­dards Aus­tralia rep­re­sen­ta­tive on ISO/IEC JWG 1 for com­bin­ing EN ISO 13849 and IEC 62061.

A draft for the ap­pli­ca­tions guide (project 101164, AS/ NZS 4024.1100) has been pre­pared by the chair and is be­ing edited and pro­gressed by SA for com­bined pro­ce­dure and is ex­pected to go out for com­bined pro­ce­dure shortly. Com­mit­tee com­ments on the doc­u­ment are then in­vited as part of the six weeks com­bined pro­ce­dure stage. Com­ments re­ceived be­fore the meet­ing were con­sid­ered by the com­mit­tee at the meet­ing to en­able the doc­u­ment to progress to pub­li­ca­tion quickly af­ter the com­bined pro­ce­dure clos­ing date.

The meet­ing also dis­cuss the con­veyor drafts pre­pared by SC SF-041-01 to progress those drafts to com­mit­tee bal­lot and sub­se­quent pub­li­ca­tion.

The meet­ing will fur­ther dis­cuss project 101820 for AS/NZS 4024.2802 and any in­tended fu­ture work items.

Progress on de­vel­op­ing AS/ NZS 4024 is great and well over­due, the in­sti­tute should be con­grat­u­lated for driv­ing the ini­tia­tive. Auck­land branch meet­ing The Auck­land branch of the NZEI is hold­ing a tech­ni­cal meet­ing at Bright­light on 24 July at Bright­light’s of­fices in Auck­land.

Bright­light LED light­ing has the coun­try’s largest LED show­room with light­ing func­tion­ing in a live en­vi­ron­ment. Of­fice light­ing, res­i­den­tial and in­dus­trial light­ing plus of course colour chang­ing. The firm will do a short pre­sen­ta­tion on LED prod­ucts and tech­nol­ogy. Staff will give an over­view of res­i­den­tial, com­mer­cial, and in­dus­trial ap­pli­ca­tion prod­ucts avail­able. Just an­other great rea­son to be­long to the coun­try’s lead­ing elec­tri­cal or­gan­i­sa­tion.

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