technical reference
3
15
Synrad
Firestar ti-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. If your system does not supply a
Shutter Open Request
signal, this pin must be
connected to a voltage source in the range of ±5–24 VDC. Refer to Figure 3-8 for a diagram
showing how the
Shutter Open Request
input is factory-jumpered. When a voltage is initially
applied to this input, there is a five-second delay during which lasing is inhibited. Because all DC
power is removed from the laser’s RF board when this input is inactive, no lasing can occur until
voltage is applied to Pin 10. See Table 3-4 for input circuit specifications.
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
to the Open position. Las-
ing is inhibited when voltage is removed from Pin 10 or the
Shutter Switch
is Closed.
Note:
To ensure optimum laser performance, there is a five-second delay imposed from the time
a
Shutter Open Request
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 specifications.
Figure 3-8 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.
Figure 3-8
Quick Start Plug wiring diagram
Figure 3-9 on the following page illustrates the input circuit’s equivalent internal schematic while Table
3-4 provides Firestar ti-Series input circuit specifications.
Pin 1
PWM Return
Pin 9
PWM Input
Pin 3
Remote Interlock
Pin 4
+5 VDC Auxiliary Power
Pin 10
Shutter Open Request
Pin 11
Input Common
Pin 12
Aux. DC Power Ground
Pin 15
Pin 9
Pin 8
Pin 1
PWM Input BNC
Rear (Solder Side)
of Male DB15
"Quick Start"
Shorting Plug
