INPUT/OUTPUT SIGNALS
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Remote Interlock faults (INT LED illuminates red) are not latched. Re-applying a voltage to Pin 3
enables the RDY indicator and lasing is possible after the five-second delay, provided that the
SHT indicator is also lit.
Use the interlock function to provide maximum operator safety. When the Remote Interlock input
is opened (voltage source removed), the internal shutter automatically closes to block the beam
path, the RDY LED turns Off, the SHT LED turns Off (regardless of the state of the Shutter Open
Request input), and all DC power is removed from the RF boards.
Pin 9 PWM Input
Connect your PWM Command signal (+5 VDC, 5 kHz nominal, 100 kHz max) to Pin 9. This pulse
width modulated Command signal controls laser output so that a duty cycle of 50% corresponds
to a laser output of approximately one-half rated output power and a duty cycle of 95%
corresponds to approximately full output power. Refer to Controlling laser power in this section
for further information on laser control signals. Connect the PWM signal source return to Pin 1,
PWM Return. See Table 3-4 for input circuit specifications.
Pin 10 Shutter Open Request
Apply a positive or negative voltage (±5–24 VDC) with respect to Pin 11, Input Common, to open
the internal electromechanical shutter assembly (when the Remote Interlock input is active). If
your system does not supply a Shutter Open Request signal, then this pin must be connected to
a voltage source in the range of ±5–24 VDC. Refer to Figure 3-7 for a diagram showing how the
Shutter Open Request input is factory-jumpered on the Quick Start Plug. See Table 3-4 for input
circuit specifications.
Pin 11 Input Common
Use this pin to connect return lines for Remote Interlock, Shutter Open Request, and Remote
Reset/Start Request lines. Refer to Table 3-4 for input circuit specifications.
Figure below illustrates how Remote Interlock and Shutter Open Request inputs are factory-jumpered on
the Quick Start Plug to enable lasing for initial testing and troubleshooting purposes.
Warning: Serious Personal Injury
The use of the Quick Start Plug bypasses the laser’s safety interlock function, potentially exposing
personnel in the area to invisible infrared laser radiation.
The Quick Start Plug is intended only for initial testing and troubleshooting by qualified personnel. In
normal operation, the laser’s Remote Interlock input should be connected to the machine’s safety
interlock circuitry.
