Click buttons for model numbers. Infra-red (IR) safety edge model FCU47 The latest version of our North American design, featuring 47 diagonal infra-red (IR) beams in an aluminium housing (30mm wide x 20mm deep). As with the FCU 35, the FCU 47 is capable of wiring directly into suitable door controllers, or the FPS 270. Infra-red (IR) safety edge model FCU35 Our standard 35-beam infra-red (IR) curtain, primarily intended for European and Asia Pacific applications. The product features a multiplexed diagonal array of 35 infra-red (IR) beams, packaged in a 9mm wide x 26mm aluminium housing. As with the FCU 47, the FCU 35 is capable of wiring directly into suitable door controllers, or the FPS 270 universal interface. Universal interface model FPS270 Formula's standard universal interface to combine with the FCU 35, and FCU 47 products for modernisation projects. Simple to install and connect, the FPS270 provides power to the COLs and standard relay outputs, and is compatible with all types of door systems. A nudging version is also available to provide extra door control. Orator