That 30mm figure means it catches fingers reaching into the hazard zone, meeting the finger-protection class per IEC 61496-1. It runs on 24VDC and covers a protective height of 270mm, with 12 beams spaced at a 20mm pitch.
Operating range spans 0.3m to 20.0m, so it fits both tight machine guarding and longer conveyor zones. Built-in blanking and muting functions let you ignore fixed obstructions (like a machine frame) or pause the curtain during a pallet pass without disabling safety. That saves wiring external bypass relays. The 12-beam array with 20mm pitch gives a 270mm protected zone — tall enough for hand/arm access on most small to mid-size machines.