Introduction To Safety Interlock; Start Operation Sequence - Raycus RFL-C30000M-CE User Manual

4.5 Introduction to Safety Interlock

Raycus' product is designed with a safe interlocking loop, which is a two-channel system with
output monitoring and manual reset. When the safety interlocking circuit is open, the safety circuit will
disconnect the working power of the optical module, that is, the main power supply of the optical module.
To start the main power supply, you must close the two interlocking channels (24 pin interface: short 17
and 20, short 18 and 19). Otherwise, the main power will be turned off and the laser can not be turned on
at this time. When one of the channels is open, the laser main power supply is impossible to start until the
other channel is open, and then the two channels are closed before the laser main power supply can be
started.
If the interlock is closed (the stop button is also released) and there is no error alarm, press the start
(LASER) button to start the main power supply, and "the main power has been started" pin of the external
interface(XP1-B8) will have a high-level output. When the security interlocking circuit is open or the
error is detected, the main power supply of the optical module will be turned off, and the B8 of XP1
interface will become low level. The detected "error state" is latched and the on-board relay opens the
manual reset loop with monitoring until the error is cleared, thus preventing the laser from being restarted.
If errors such as short circuit between interlocking channels or short circuit of start (LASER) button are
detected, the safety loop can not be reset before the error is cleared.

4.6 Start Operation Sequence

a) Turn on the water cooler, check whether the water pipe is leaking, turn off the water cooler and
connect electrically.
b) Make sure the circuit breaker is in a OFF state and the stop button on the front panel of the laser
EMERGENCY STOP pressed; all electrical connections must be completed before the laser is
powered on.
c) Confirm that the three-phase electrical connection is correct and the power supply meets the
specifications of the power supply.
d) Close the rear panel circuit breaker, release the laser front panel emergency stop switch; turn on
the key switch, and the laser has a temperature and humidity alarm, turn off the key switch.
After the air conditioner works for 10 minutes, turn on the key switch again. Wait for the air
conditioner to continue working for 10 minutes until the temperature and humidity alarm of the
laser does not appear, at this time, turn off the key switch and turn on the water cooler; ensure
that all laser doors are closed, optical cable output head has been inserted into the cutting head
(or corresponding equipment), all interlock interfaces have been closed;
30