Shutter Functions - Novanta v40 User Manual

SHUTTER FUNCTIONS

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Shutter functions
A mechanical Shutter Switch is installed on all Keyswitch-equipped lasers. Lasing is enabled when the
shutter is Open (SHT LED illuminated blue) and disabled when the shutter is Closed (SHT LED off). The
SHT LED illuminates blue to indicate that DC power is applied to the RF driver.
For v40 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 ON position. Applying a ±5–24 VDC signal between Pin 10,
Shutter Open Request, and Pin 11, Input Common, causes the SHT LED to illuminate and sends DC power
to the RF driver, enabling lasing after a five-second delay. Removing the Shutter Open Request signal
removes DC power from the RF driver, extinguishing the SHT lamp. Lasing remains disabled until 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 to Pin 14, Shutter Open, and Pin 13, Output Common (see Figure 3-16). The Shutter Open
output closes when the Shutter Switch is Open, and a Shutter Open Request signal is present (SHT
indicator illuminated blue). The output is open (SHT LED off) when the Shutter Switch is Closed, or the
Shutter Open Request signal is removed.
Important Note: A five-second delay occurs between the time the Shutter Open output closes
and lasing is enabled.
Remote interlock functions
Interlock circuits are often used to disable machinery when a shield, panel, or door is opened. 's remote
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 signal via Pin 3 on the User I/O connector.
To use 's remote interlock feature, apply a ±5–24 VDC signal to Pin 3, Remote Interlock, and Pin 11, Input
Common. Applying a Remote 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 Remote 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 remote interlock status on the User I/O connector by connecting your
system's input to Pin 15, Interlock Open, and Pin 13, Output Common (prior figure). This output is closed
when remote interlock circuitry is open (INT indicator illuminated red). The output is open (INT LED
green) when interlock circuitry is closed.