Synrad Novanta 48 Series, Manual, Page: 56 / 89

SAMPLE OUTPUT CIRCUITS PAGE | 56
The figure below shows how to connect the laser’s Remote Interlock input in series with one or more door
safety switches or relay contacts.
Figure 4-10 Remote Interlock circuit.
Sample output circuits
Figures below illustrate how to connect the laser’s Remote Ready LED Output to a Programmable Logic
Controller (PLC) DC input module using current sourcing, current sinking, and resistive pull-up methods.
Important Note: You can use these same circuits to monitor the laser’s Remote Lase LED Output
(DB-9, Pin 8); however, the Remote Lase LED Output is not a steady state (on/off) output. It is a
Pulse Width Modulated (PWM) signal based on the PWM Command input signal to the laser.
Figure 4-11 Remote Ready output to PLC input (PLC sourcing).
The following figure shows how to connect the Message Output signal on the DB-9 Connector to a PLC.
The Message Output function provides a pre-shutdown temperature indication when laser tube
temperature reaches 54 °C ±2 °C, signaling the need to increase laser cooling or risk laser shutdown if
laser temperature rises to > 60 °C ±2 °C.