This is my Ruida. Notice in the center is the definitions of the LEDs.
Does it startup and home properly?
On your PSU where is P wired?
This is the water protection on the power supply. It needs to taken or held low. It may not fire with the test button if the WP circuit isn’t active (low.)
I think this is how my power supply is laid out.
H: Laser output control (high level effective)
L: Laser output control (low level effective)
P: Water protectio switch (valid if grouded)
G: Ground signal
IN: Laser energy control signal (0-5V)
5V: Output 5V/50mA
The big connectors are probably the HV connections. Leave them alone unless we have to go there.