© 2016 SPI Lasers UK Ltd.
Commercial in Confidence
SM-S00500 Revision A 21 October 2016
redPOWER QUBE Cased Fiber Laser User Manual
5.4 Control System Safety Functions
5.4.1 Overview
The laser control system provides six safety related functions. These are implemented in
electronic and electromechanical circuits and have been designed and validated to defined
safety performance levels, as specified in BS EN ISO 13849-1:2015, Safety of machinery.
Safety-related parts of control systems. General principles for design. These functions are
also monitored by the laser control system and reported via FiberView. The functions are as
follows.
5.4.2 Prevention of Unauthorised Use
This is provided by the key switch on the laser front panel. The laser can only be operated
when the key is in the ON position. The key is captive in the ON position and can only be
removed in the OFF position. The key switch is part of a dual channel category 4 circuit with
safety relay.
5.4.3 Prevention of Unexpected Start-Up
This is provided by a dual channel category 4 circuit with safety relay and the RESET
pushbutton on the laser front panel. The RESET button must be pressed after any of the
following events:
the electrical supply is switched on
the electrical supply is interrupted and restored
the Emergency Stop is operated and reset
the remote interlock is opened and restored
the key switch is turned off and then on
After pressing and releasing the RESET button, it will light-up blue to indicate the laser can be
started. The RESET function may also be performed by a remote, customer supplied, volt-free
contact connected to PL98.
5.4.4 Emergency Stop
This is provided by the red mushroom pushbutton on the laser front panel and a dual channel
category 4 circuit with safety relay. The Emergency Stop button latches when pressed and
should be turned clockwise to release. After releasing the Emergency Stop button, the RESET
button must be pressed before the laser can be restarted.
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