Laser safety shutter LS-20

The Lasermet LS-20 Laser Safety Shutter is intended to provide a means of preventing accidental exposure to a potentially harmful laser beam. It has been designed to form part of a high-integrity safety system and features a gravity-close blade and force-disconnect proving contacts. When closed, the shutter deflects the incoming laser beam onto an internal beam dump where the energy is converted to heat which is dissipated in the aluminium casing of the shutter. When the shutter is open, the laser beam passes through the shutter without interruption. SIL Rated Version A ‘SIL3’ version is available which, when correctly wired to a Lasermet Interlock® Control System, can provide a safety Interlock® which meets Safety Integrity Level 3 to EN61508 and Performance Level ‘e’ to EN ISO 13849-1. Control Options Standard operation is by means of the ‘Open’ and ‘Close’ buttons on top of the shutter case. A remote switching station (LS-RS20) is available for remote operation of the shutter. Alternatively the shutter can be set to open as soon as power is applied. In all cases the shutter will close when power is removed. Connection to Beam Tube System The LS-20 has 16 mm diameter entry and exit apertures. These are threaded and beam tubes can be supplied to fit to the shutter case and enclose the laser beam. Beam Shutter for High Power Lasers The maximum average power for use with the internal beam dump is 20 W. However for higher powers the beam dump can be easily removed by unscrewing it from the side of the shutter case. Beam tubes can be fitted and the beam can be directed to a remote beam dump.