technical reference
3
27
Synrad
Firestar ti-Series
operator’s manual
Integrating Firestar safety features
The
Laser Ready
output closes when the laser is enabled (
RDY
LED illuminated yellow), indicating that
lasing is possible. The output is open (in a high-impedance state) and the
RDY
LED is off when lasing is
disabled.
Note:
After the
Laser Ready
output closes, a five-second delay occurs before lasing is enabled.
Shutter functions
A mechanical
Shutter Switch
is installed on all
Keyswitch
-equipped lasers. Lasing is enabled when the shut-
ter is Open (
SHT
LED illuminated blue) and disabled when the shutter is Closed (
SHT
LED off). The
SHT
LED illuminated blue to indicate that DC power is applied to the RF driver.
For ti-Series OEM and
Keyswitch
-equipped lasers in automated systems, the shutter function is provided by
the
Shutter Open Request
signal via Pin 10 on the
User I/O
connector. To use this “remote shutter”, first
place the
Shutter Switch
(if equipped) in the Open position and then apply a voltage in the range of ±5–24
VDC to Pin 10,
Shutter Open Request
. This input signal causes the
SHT
LED to illuminate and sends
DC power to the RF driver, enabling lasing after a five-second delay. Lasing is disabled until the manual
Shutter Switch
is placed in the Open position and a
Shutter Open Request
signal is applied to Pin 10.
Your control system can monitor the laser’s shutter status on the
User I/O
connector by connecting your
system’s input between Pin 14,
Shutter Open
, and Pin 13,
Output Common
(see Figure 3-17). The
Shut-
ter Open
output closes when the
Shutter Switch
is Open and a
Shutter Open Request
signal is present
(
SHT
LED illuminated blue). The output is open (in a high-impedance state) and the
SHT
LED is off
when the
Shutter Switch
is Closed or the
Shutter Open Request
signal is removed.
Note:
After the
Shutter Open
output closes, a five-second delay occurs before lasing is enabled.
Remote interlock functions
Interlock circuits are often used to disable machinery when a shield, panel, or door is opened. Firestar’s re-
mote interlock function allows you to connect into an external remote interlock circuit and prevent lasing
by removing DC power from the laser’s RF driver boards when the circuit is electrically “open”.
Lasing is enabled when a
Remote Interlock
signal is present (
INT
LED illuminated green), if
RDY
and
SHT
LEDs are illuminated, and disabled when the
Remote Interlock
signal is removed (
INT
LED red,
RDY
LED off). DC power is applied to the RF driver only when the
INT
LED is green and the
RDY
LED is
yellow (and the
SHT
LED is illuminated blue). Remote interlock functionality is provided by the
Remote
Interlock
input signal via Pin 3 on the
User I/O
connector.
To use Firestar’s remote interlock feature, apply a voltage in the range of ±5–24 VDC to Pin 3,
Remote
Interlock
. Applying an interlock signal causes the
INT
LED to illuminate green and sends DC power to
the RF driver, which enables lasing after a five-second delay (provided that the
RDY
LED is yellow and the
SHT
LED is blue). Removing the interlock signal removes DC power from the RF driver, causing the
INT
LED to turn red and the
RDY
LED to turn off. Lasing remains disabled until a
Remote Interlock
signal is
reapplied to Pin 3.
Your control system can monitor the laser’s remote interlock status on the
User I/O
connector by connect-
ing your system’s input between Pin 15,
Interlock Open
, and Pin 13,
Output Common
(see Figure 3-17).
This output is closed when remote interlock circuitry is open (
INT
indicator illuminated red). The output
is open (in a high-impedance state) and the
INT
LED is green when interlock circuitry is closed.
Note:
After the
Interlock Open
output opens, a five-second delay occurs before lasing is enabled.
