nifty TrackDrive TD120T Series Operating/safety Instructions Manual

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nifty TrackDrive TD120T Series Operating/safety Instructions Manual Manual pdf 42 page image

TrackDrive (TD) SeriesOperating & Safety InstructionsEnglish/USA – 02/1740Appendix ASafety Related Parts of the Control System (SRP/CS)The Niftylift control system has been designed and validated according to the required standards. Thetable below lists the safety related parts of the control system and the level to which they have beenapproved.The performance level (PL) of each SRP/CS is specified by BS EN 280:2013+A1 2015 section 5.11Table 5.Safety Related Part of the Control System(SRP/CS)Approval(Standard, Performance Level)A1 Monitoring of stabilisers - Setting up ISO 13849-1:2008 PL cA2 Monitoring of stabilisers - Booms ISO 13849-1:2008 PL dA3 Platform levelling ISO 13849-1:2008 PL cA4 Interlocking of control positions ISO 13849-1:2008 PL cA5 Prevent movements of load holding cylindersin case of pipe failure ISO 13849-1:2008 PL cA1 MONITORING OF STABILISERS – SETTING UPThe monitoring of the stabilisers is PL c in accordance with ISO 13849-1:2008 as required by BS EN280:2013+A1 2015.1. The limits of the safety-related parts to the category selected and any fault exclusions;The stabiliser monitoring is only active when the booms are lifted up off the boom rest such that theboom switch is actuated.The boom switch relies on the electrical contacts opening allowing the stabiliser monitoring circuit tobecome ‘active’.The opening of the contacts is forced by the use of the spring contained within the jack foot switchassembly. Proper maintenance and daily safety checks to be observed.The boom switch cannot be overridden to bypass the tilt system other than by demounting the switchwith the use of tools. Reasonably foreseeable misuse.If the boom switch is removed or if it is not maintained in accordance with the appropriatedocumentation the stabiliser monitoring may not function in compliance with the requirements as a PLc category 1 device.2. The limits of the SRP/CS and any fault exclusion, for which, when essential for maintaining theselected category or categories and safety performance, appropriate information (e.g. formodification, maintenance and repair) shall be given to ensure the continued justification of the faultexclusion(s);Do not alter, modify or disable in any way the controls, safety devices, interlocks or any other part ofthe machine.