Synrad Firestar f201 - Figure 3-8 Input Equivalent Schematic

technical reference
317
Synrad Firestar f-Series operator’s manual
User I/O connections
Figure 3-8 illustrates the input circuit’s equivalent internal schematic while Table 3-4 provides Firestar
f-Series input circuit specications.
Figure 3-8 Input equivalent schematic
Table 3-4 Input circuit specications
Input Signal Name Input Device Type and Specications
PWM Input High-speed optoisolator LED, forward voltage drop (Vf) 1.5 VDC
O state Vmax +0.8 VDC
On state Vmin +3.5 VDC @ 3 mA
On state (continuous) Vmax +6.7 VDC @ 10 mA
Frequency, max. 100 kHz
Remote Reset/Start Request Bi-directional optoisolator LED, forward voltage drop (Vf) 1.15 VDC
Remote Interlock O state Vmax < 1.0 VDC
Shutter Open Request On state Vmin ±5.0 VDC @ 7 mA
On state (continuous) Vmax ±24.0 VDC @ 40 mA
Note: The Remote Reset/Start Request input must not be sent until Firestar’s +5 VDC power supply
has stabilized (approximately 200 ms after DC power-up).
U
S
ER I
/O
INPUT
S
I
G
NAL PIN
S
PWM INPUT (+) (9)
PWM RETURN (–) (1)
REMO
TE RESET/START REQUEST (2)
REMOTE INTERLOCK (3)
SHUTTER OPEN REQUEST (10)
INPUT COMMON (11)
600 Ohm, 2W
600 Ohm, 2W
600 Ohm, 2W
FIRESTAR f-SERIES
INPUT CIRCUITRY
220 Ohm, 1/8W
430 Ohm, 1/10W