6
External Input Characteristics (cont.)
D122 T132
Name Description
*
*
Pulse In (BNC)
Input impedance 10K ohms. Active-low. Source current 500
µA. Maximum voltage to ensure proper ope.5VDC.
*
Pulse In (Control #3, T132)
Input impedance 4.7K ohms. Maximum input V5VDC.
Minimum input pulse +3.5VDC.
*
Pulse In (Control #2, D122) Input impedance 4.7K ohms. Maximum input V5VDC.
Minimum input pulse +3.5VDC.
Pulse In will drive internal shutter drive directly
(T132 and
D122)
and bypass internal timer
(T132 only).
Minimum pulse
width determined by shutter used. Maximum pulse width
determined by exposure desired.
*
*
Reset (BNC)
Input impedance 10K ohms. Active-low. Source current 500
µA. Minimum pulse to ensure reset 100 µs. Maximum voltage
required to ensure t.5VDC. (25msec pulse required for
D122 reset).
*
Reset (Control #2, T132)
Input impedance 4.7K ohms. Active-high. Maximum input
V5VDC. Minimum input pulse +3.5VDC. Minimum
input pulse to ensure reset 100 µs.
*
Pulse O/C (BNC)
Input impedance 10K ohms. Active-low. Source current 500
µA. Minimum pulse to activate 300 µs. Maximum voltage
required to ensure ope.5VDC. First pulse input (after
power up) will open shutter, next pulse will close shutter.
Additional pulses will toggle shutter continuously.
*
Interrupt In (Control #4)
Input impedance 330 ohms. Active-high. Input voltage required
to activate int8.0 VDC. (Switch Control #1 into
“Interrupt In” to ensure proper voltage level input.)
*
*
RS-232C (DB-9 female)
Baud rate 300, No parity, 8 Bits, 1 Stop bit. See page #21 for
test program.
RS232 Commands
Decimal HEX Octal Binary ASCII
*
*
Open
64 40 100 01000000 @
*
*
Close
65 41 101 01000001 A
*
Trigger
66 42 102 01000010 B
*
*
Reset
67 43 103 01000011 C
DB-9 Connector Pin-out:
Pin 2 Rx Receive Data
Pin 5 GND Signal Ground
Pin 6 DSR Data Set Ready
Pin 7 RTS Request to Send
Pin 8 CTS Clear to Send
{Pins 6, 7, 8 connected internally. Pins 1, 3, 4, 9 not used, (no
connection). Data available 35 msec after transmission
from host.}
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