technical reference
3
17
Synrad
Firestar i401
operator’s manual
User I/O connections
Output signals
Firestar’s five user outputs correspond to the status functions described below. These outputs are
optoisolated solid-state relays that allow for high-side or low-side switching. The shared connection,
Out-
put Common
, is separate from the laser’s chassis ground to allow high-side or low-side switching and to
isolate control signals for optimum EMI performance.
Firestar’s optically-isolated outputs are useful for sending laser status to a Programmable Logic Controller
(PLC) or computerized control system. Each of the five outputs can source 50 mA at ±24 VDC maximum
for a total load of 250 mA. For controlling larger loads, use these outputs to drive a control relay.
Note:
Interlock Open
and
Shutter Open
output signals are dependent control functions. The
Shutter
Open
output will
not close (
SHT
LED On) until a
Shutter Open Request
signal is applied and
the
Interlock Open
output opens (causing
INT
LED to illuminate green and
RDY
LED to turn
On).
Pin 6 Laser Active
This bi-directional switched output is internally connected to Pin 13,
Output Common
, when
the laser is actively lasing (
LASE
indicator red). This output is open (high impedance) when no
beam is being emitted (
LASE
indicator Off). Refer to Table 3-5 for output circuit specifications.
Pin 7 Fault Detected
This bi-directional switched output is internally connected to Pin 13,
Output Common
, when
(1) an over-temperature fault (
TMP
LED is red) or (2) a No-Strike condition (blue
SHT
indica-
tor is flashing) has occurred. The output is open (high impedance) when laser operation is within
limits (
TMP
LED green and
SHT
LED blue). Refer to Table 3-5 for output circuit specifications.
Pin 8 Laser Ready
This bi-directional switched output is internally connected to Pin 13,
Output Common
, when
the laser is enabled (
RDY
indicator On), indicating that lasing will occur when a PWM Com-
mand signal is applied to Pin 9 and Pin 1. When this output is initially switched closed, there is
a five-second delay during which lasing is inhibited. This output is open (high impedance) when
the laser is disabled (
RDY
LED Off). Refer to Table 3-5 for output circuit specifications.
Pin 13 Output Common
Use this pin to complete the return (ground) path for any output connection (Pin 6, 7, 8, 14, or
15). The
Output Common
line is protected by a 0.3 A self-resetting fuse.
Pin 14 Shutter Open
This bi-directional switched output is internally connected to Pin 13,
Output Common
, when
Remote Interlock
and
Shutter Open Request
signals are present (
SHT
LED blue and
RDY
LED
yellow), indicating that lasing is enabled. This output is open (high impedance) when the laser is
disabled (
SHT
LED Off). Refer to Table 3-5 for output circuit specifications.
