Using The Chiller Alarm Output
Most laser power supplies have a connection for a waterflow sensor that will not allow the laser to fire if there is no water flow. Many lasers come with a waterflow sensor already installed but some do not. If you have a CW-5xxx series Water Chiller it has a built in flow alarm that can be connected to the machine and prevent the laser from firing if there is a cooling system fault. If you want to utilize this alarm output you will need to connect it to the laser.
You can use the connection on the laser power supply or, if your controller or DSP has the capability, you can connect it to the controller. It may also be possible, if you already have a waterflow sensor installed going to the power supply, to add the chiller alarm output to the controller as a redundant safety.
Below is the pinout of the CW-5xxx chiller alarm output:
IN MOST INSTANCES YOU WILL USE H1 and H3
And here is the relay matrix:
Common Connection Types
You will need to determine which pins to use depending on the method of connectivity to your specific machine.
Some common configurations can be found below:
Typical 50W+ Laser Power Supply
WARNING: THERE MAY BE OTHER INTERLOCKS ON THIS CIRCUIT.
IF SO, WIRE ALL INTERLOCKS IN SERIES.
In this instance you will use H1 and H3 on the Chiller and Pins WP and G on the LPSU.
Typical Ruida Controller
WARNING: THIS FUNCTION MUST BE ENABLED IN THE CONTROLLER.
THE PORT IS NOT MONITORED BY DEFAULT. SEE MANUAL BELOW.
In this instance you will use H1 and H3 on the Chiller and connector CN5 Pins 1 and 5 on the Ruida Controller
Typical K40 Power Supply
THIS CONTENT WILL BE POPULATED SOON. IT IS SIMILAR TO THE 50W+ EXAMPLE ABOVE.