Lasermet LS-20, Инструкция по эксплуатации

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LS-20 Instruction Manual
00629-53-000 Page 5 of 18 Issue 12 19 January 2021
3 Concept
The Lasermet LS-20 Laser Safety Shutter is intended to provide a means of preventing accidental
exposure to a potentially harmful laser beam.
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.
The shutter has been designed to form part of a high-integrity safety system and features a gravity-
close blade and force-disconnect proving contacts.
A ‘SIL3’ version is available which, when correctly wired to a Lasermet Interlock Control System can
provide a safety interlock which meets SIL-3 and EN13849-1 up to performance level ‘e’.
4 Control Options
The shutter is usually powered by a laser interlock system such as Lasermet’s ICS Interlock Control
System. These systems will provide power to allow actuation of the shutter once all safety interlocks
(for example, doors, covers etc.) have been closed. If the interlock system is tripped out, the shutter
will immediately close. It then cannot be opened until the interlock system is re-armed.
The shutter may be wired to operate in one of three different ways:
1. The Arming of the interlock system enables operation of the shutter. The buttons on top of
the shutter may then be used to open and close it as desired.
2. The Arming of the interlock system enables operation of the shutter. The shutter may then
be remotely opened and closed by external controls or buttons such as Lasermet’s LS-20 LS-
RS units. The buttons on top of the shutter may also be used.
3. The arming of the interlock system causes the shutter to open immediately.
The shutter may also be wired into bespoke custom systems.
The shutter operates on 24VDC and draws typically 100mA when open and 20mA when closed.
There is an initial impulse of approximately 1A on opening and the specification of power supplies
and cabling must take this into account.
SIL3 shutters draw twice as much current as standard units.
Note that the LS-20 will not operate on 12V systems as used for LS-10 and LS-100. Lasermet interlock
systems can be reconfigured to provide the necessary 24V.