technical reference
316
Synrad Firestar f-Series operator’s manual
User I/O connections
Pin 10 Shutter Open Request
Apply a positive or negative voltage (±5–24 VDC) with respect to Pin 11, Input Common, to
enable lasing, in conjunction with the manual Shutter Switch (if equipped). If your system does
not supply a Shutter Open Request signal, this input 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. When a voltage is initially applied to
this input, there is a ve-second delay during which lasing is inhibited. Because all DC power is
removed from the laser’s RF driver when this input is inactive, no lasing can occur until voltage is
applied to Pin 10. See Table 3-4 for input circuit specications.
To enable Keyswitch-equipped lasers, you must apply a voltage (in the range of ±5–24 VDC) to
the Shutter Open Request input and move the manual Shutter Switch (if equipped) to the Open
position. Lasing is inhibited when voltage is removed from Pin 10 or the Shutter Switch is Closed.
Note: To ensure optimum performance, a ve-second delay is imposed from the time a Shutter
Open Request input occurs to the time that PWM Command signals are accepted.
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 specications.
Figure 3-7 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.
Pin 1 PWM Return
Pin 9 PWM Input
Pin 3 Remote Interlock
Pin 4 +5 VDC
Pin 10 Shutter Open Request
Pin 11 Input Common
Pin 12 Aux. DC Power Ground
Pin 8 Pin 1
PWM Input BNC
of Male DB15
"Quick Start"
Shorting Plug
Figure 3-7 Quick Start Plug wiring diagram
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 trouble-
shooting by qualied personnel. In normal operation, the laser’s
Remote Interlock input should be connected to the machine’s safety
interlock circuitry.