23
Synrad Firestar OEM v30 reference guide
Technical reference (cont.)
Note: You must connect a Laser Enable signal to Pin 9 before applying a PWM Command signal to Pin 1, PWM Positive,
and Pin 6, PWM Negative. Configure your control system to provide a Laser Enable signal only after all other safe
operating conditions are met.
Caution
possible
equipment
damage
The Interface A (DB-9) Laser Enable input is a direct 5V logic input. Do not send
a voltage signal to the Laser Enable input (Pin 9) until DC power is applied—the
control board will be damaged. Observe all 5V logic specifications and precau-
tions when integrating Firestar OEM v30 inputs and outputs into your control
system.
The DB-9 Interface A connector provides four 5V logic level outputs to communicate laser status to the control system.
Laser Ready goes high when lasing is possible; the output is low when the laser is not ready. Lase Indicator goes high when the
PWM signal is sufficient to induce laser output; the output is low when no beam is being emitted. DC Voltage Fault goes high
after sensing an under/over voltage condition; the output is low when the DC supply voltage is within limits. Overtemp Fault
goes high when laser temp rises above its upper thermal limit; otherwise, the output is low.
Note: When an over temperature condition occurs, cool the laser below its over temperature threshold and then cycle
DC power to restore normal operation.
Table 5 Interface A (DB-9) pinouts
Pin Name Function
1 PWM Positive Optoisolated input for PWM and tickle signals. Reference Pin 1 to PWM Negative (Pin 6).
2 Laser Ready Logic output high when Ready to lase; low if not ready. The Laser Ready output sources 20 mA typical,
40 mA maximum.
3 Lase Indicator Logic output high when Lasing; low if not lasing. The Lase Indicator output sources 20 mA typical,
40 mA maximum.
4 Overtemp Fault Logic output high when over temperature condition detected; low if temp OK. The Overtemp Fault
output sources 20 mA typical, 40 mA maximum.
5 DC Out Pin 5 provides a +5 VDC, 250 mA maximum, user output voltage.
6 PWM Negative Negative side of optoisolated PWM Command signal. Reference Pin 6 to PWM Positive (Pin 1).
7 DC Voltage Fault Logic output high when DC input is under/over voltage limits; low if DC input OK. The DC Voltage
Fault output sources 20 mA typical, 40 mA maximum.
8 GND Ground pin for all DB-9 input/output signals except PWM Positive.
9 Laser Enable Logic input. Enables laser when high; disables laser when low. A five-second delay is invoked after
this pin goes high. Laser Enable must be high before PWM Positive can fire the laser.
Note: When switching +5 VDC to the Laser Enable input (DB-9, Pin 9) through a switch or relay contact, we highly
recommend adding a 100 Ohm, 1/4 watt resistor in series between the switching device and the Laser Enable input.
To Next Page
Loading...
Need help?
General
