DANSK DS/EN 60947-5-8 PDF

This part of 60947 specifies requirements for three-position enabling switches. These switches are used as components of enabling devices described in 10.9 of 60204-1 to provide signals that, a) when activated, allow machine operation to be initiated by a separate start control, and b) when de-activated, i) initiate a stop function, and ii) prevent initiation of machine operation. NOTE 1: The enabling control function is described in 9.2.6.3 of 60204-1. NOTE 2: This standard does not deal with enabling devices. This standard does not apply to: - three-position enabling switches for non-electrical control circuits, for example hydraulic, pneumatic; - enabling switches without three-position mechanism; - emergency stop devices (see 60947-5-5).