Keyswitch Functions - Novanta v40 User Manual

KEYSWITCH FUNCTIONS

Keyswitch functions
Keyswitch lasers
After DC power-up or after a remote interlock fault, the Keyswitch must be toggled to reset the laser
and enable the RDY LED, signaling that DC power is applied to the RF driver. Over temperature faults
are reset by removing, then reapplying DC power after the laser has cooled.
For Keyswitch lasers used in automated systems, this reset function is provided by the Remote Reset/
Start Request signal via Pin 2 on the User I/O connector. To use this "remote keyswitch" functionality,
first place the Keyswitch in the ON position. To reset a fault condition, apply a ±5–24 VDC signal to Pin 2,
Remote Reset/Start Request, and Pin 11, Input Common. Removing the signal applies power to the RF
driver causing the RDY lamp to illuminate and begins a five-second countdown after which lasing is
enabled. The RF driver is disabled as long as a ±5–24 VDC signal is applied to Pin 2.
Your control system can monitor the laser's ready status on the User I/O connector by connecting your
system's input to Pin 8, Laser Ready, and Pin 13, Output Common (see output driving PLC input module
Figure 4-16). The Laser Ready output closes when the laser is enabled (RDY LED illuminated yellow),
indicating that lasing is possible. The output is open (RDY LED off) when lasing is disabled.
Important Note: A five-second delay occurs between the time the Laser Ready output closes and
lasing is enabled.
OEM lasers
On OEM lasers, the RDY LED illuminates on DC power-up (provided that Shutter Open Request and
Remote Interlock inputs are enabled) and five seconds later DC power is applied to the RF driver. Over
temperature faults are reset by removing and then reapplying DC power after the laser has cooled.
Remote interlock faults are not latched; the RDY LED illuminates yellow as soon as the interlock circuit is
closed (when the INT LED turns from red to green) and five seconds later lasing is enabled.
Although a Remote Reset/Start Request input is not needed to reset OEM faults, it can be used to inhibit
(disable) lasing. Disable the laser by applying a ±5–24 VDC signal to Pin 2, Remote Reset/Start Request,
and Pin 11, Input Common. Removing the signal applies power to the RF driver causing the RDY lamp to
illuminate and begins a five-second countdown after which lasing is enabled. The RF driver is disabled as
long as a ±5–24 VDC Remote Reset/Start Request input is applied.
Your control system can monitor the laser's ready status on the User I/O connector by connecting your
system's input to Pin 8, Laser Ready, and Pin 13, Output Common (see prior table).
The Laser Ready output closes when the laser is enabled (RDY LED illuminated yellow), indicating that
lasing is possible. The output is open (RDY LED off) when lasing is disabled.
Important Note: A five-second delay occurs between the time the Laser Ready output closes and
lasing is enabled.
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