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 swi5 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.
