Synrad 48 Series - Resetting Faults

maintenance/
troubleshooting
48
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
Troubleshooting
Resetting faults
Keyswitch lasers
On Keyswitch lasers, the PWR indicator illuminates green only when the Remote Interlock input is closed
and the Keyswitch is cycled from OFF to the ON position (or the Remote Keyswitch input is opened and
then closed). After the PWR indicator illuminates, a five-second delay occurs before the laser is permit-
ted to lase. The LASE LED illuminates dimly when tickle pulses are applied to the laser and when PWM
Command pulses are applied (and are long enough to produce laser output) the LASE LED illuminates
and appears to brighten in relation to an increasing PWM duty cycle.
To reset a remote interlock fault after the fault condition has been cleared, the Keyswitch must be cycled
from OFF to ON (or with the Keyswitch ON, cycle the Remote Keyswitch input open and then closed).
When the PWR indicator illuminates, lasing is enabled after the five-second delay.
To reset an over temperature fault, lower coolant temperature below 22 °C (water-cooled) or below
40 °C (air-cooled). When the laser cools sufficiently, remove DC power for 30 seconds and then reapply
power to the laser or cycle the Keyswitch from OFF to ON (or with the Keyswitch ON, cycle the Remote
Keyswitch input open and then closed). When the PWR indicator illuminates, lasing is enabled after the
five-second delay.
A closed shutter is not considered a fault condition; when the shutter is opened, lasing is enabled after a
five-second delay provided that the PWR indicator is illuminated green.
After a power failure or shutdown has occurred, the Power-On Reset feature will not allow lasing to
restart until the Keyswitch or Remote Keyswitch is first cycled off (open circuit condition) and then back
on (closed circuit).
During any fault shutdown, the Fault Shutdown Output (pin 1 on the DB9 Connector) latches to a low
state (0 VDC) until a keyswitched reset occurs.
OEM lasers
On OEM lasers, the PWR lamp illuminates on DC power-up. After the PWR indicator illuminates, a
five-second delay occurs before the laser is permitted to lase. The LASE LED illuminates dimly when
tickle pulses are applied to the laser and when PWM Command pulses are applied (and are long enough
to produce laser output) the LASE LED illuminates and appears to brighten in relation to an increasing
PWM duty cycle.
To reset an over temperature fault, the coolant temperature must be lowered below 22 °C (water-cooled)
or below 40 °C (air-cooled). When the laser cools sufficiently, remove DC power for 30 seconds and
then reapply power to the laser or toggle (open, then close) the Remote Keyswitch signal via pin 6 and
pin 7 on the DB9 Connector. When the PWR indicator illuminates, lasing is enabled after the five-second
delay.
The Power-On Reset feature is not available on OEM models; OEM customers must provide this required
safety feature as part of their equipment integration.
During any fault shutdown, the Fault Shutdown Output (pin 1 on the DB9 Connector) latches to a low
state (0 VDC) until a keyswitched reset occurs.