Banner EZ-SCREEN Series Type 4 Safety Light Curtain

The Banner EZ-SCREEN provides a redundant, microprocessorcontrolled, opposed-mode optoelectronic “curtain of light,” or “safety light screen.” It typically is used for point-of-operation safeguarding, and is suited to safeguard a variety of machinery. EZ-SCREEN is extensively FMEA (Failure Mode and Effects Analysis) tested to establish an extremely high degree of confidence that when properly installed, no system component will (even if it should fail) cause a failure to danger. In typical operation, if any part of an operator’s body (or any opaque object) of more than a pre-determined cross section is detected, the OSSD solid-state safety outputs will turn off. These safety outputs are connected to the guarded machine’s Final Switching Devices (FSDs) that control the primary control elements (MPCEs), which immediately stop the motion of the guarded machine. The OSSD (Output Signal Switching Device) safety outputs are capable of performing a “handshake” communication with the M uteable Safety Stop Interface (MSSI) or Universal Safety Stop Interface (USSI) found on other Banner Engineering safety products. Banner EZ-SCREEN is a two-piece (“two-box”) system – comprising an emitter and a receiver, but no external controller. The External Device Monitoring (EDM) function ensures the fault detection capability required by U.S. Control Reliability and ISO13849-1 Categories 3 and 4 without a third box, a controller or a “smart” (i.e., self-checking) safety module required of systems without EDM.