Synrad Pulstar P100 Series, Operator'S Manual, Page: 72 / 110

technical reference
3
24 Synrad Pulstar p100 operator’s manual
Integrating Pulstar safety features
Remote interlock functions
Interlock circuits are often used to disable machinery when a shield, panel, or door is opened. Pulstar’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 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. Lasing is 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 Pulstar’s remote interlock feature, apply a voltage in the range of ±5–24 VDC to Pin 3, Remote In-
terlock . Applying an interlock signal causes the
INT
LED to turn green and sends DC power to the laser’s
RF driver, which enables lasing (provided the
RDY
LED is yellow and the
SHT
LED is blue). Removing
the interlock signal causes the
INT
LED to turn red and the
RDY
LED to turn Off, removing power from
the RF driver. 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 to Pin 15, Interlock Open , and Pin 13, Output Common (see Figure 3-18). This
output is closed when remote interlock circuitry is open (
INT
LED illuminated red). The output is open
(in a high-impedance state) and the
INT
LED is green when interlock circuitry is closed.