Specifications
Diamond™ GEM, G, & K, Integrator’s Guide
38
INTERFACING DIAMOND G & K-SERIES
L
ASERS TO SYSTEMS
Diamond lasers have three types of interfaces. For OEM lasers,
connection is made directly to the RF amplifier. Basic and Perfor-
mance lasers have the Diamond Digital Interface and, optionally,
may be connected through the remote control. The information that
follows is a summary and more detailed information on interfacing
the laser is contained in the respective operator’s manual.
OEM Interface
To operate an OEM laser, the system control must be connected to
the DC power supply, the RF power supply, the water flow switch
and the (external) laser shutter.
DC Power Supply
The Coherent DC power supply manufactured by HC Power, may be
turned on by connecting Pin 6 to Pin 14 in its DB25 connector. Table
titled “DC Power Supply DB25 Connector Pinout” in the OEM
manual lists the other signals available from this connector; they are
generally not of use other than for maintenance purposes.
The laser’s water flow switch may be put in series with the power
supply enable signal so that everything shuts down if the water flow
is low. While this is simple to do, it does not provide any fault infor-
mation, leading to mysterious laser shutdowns. Also, if the low flow
is intermittent, the power supply will keep turning on and off until
the problem is corrected. It is better practice to latch the low water
flow signal and associate it with a fault output so that the problem
can be identified and corrected.
The DC supply shuts down if it detects overcurrent or overvoltage.
This can be reset only by cycling the AC power to the unit. It is
helpful, then, to have the DC supply on its own circuit breaker to
allow this. The status of the DC power supply can be sensed by
looking for +5 V on Pin 14 relative to Pin 13. There will be no
voltage if the supply has shut down.
The Coherent DC Power supply manufactured by Power One may
be turned on by connecting the REMOTE ENABLE (pin 8) and
+5 V LOGIC (pin 5) in the 25 pin cable assembly will cause the DC
power supplies to turn on. These leads can be tied into the main
interlock circuit of the end users system. One suggestion is to
connect this output in series with the water flow switch contacts as