VMM-T1 User Manual
16
Please note if an OPEN command is sent to the RS-232C input a RESET command will not clear
the RS-232C output and the shutter will not close. A CLOSE command must be sent to allow the
shutter to close. If it is desired to have the shutter close with a RESET command or the RESET
switch the shutter must be opened with a TRIGGER command. In this case the shutter will either
close, upon reset, or return to the state as set by the N.O./N.C. switch.
11.
PRE/POST
Toggle Switch:
Position of this switch determines if DELAY interval occurs before (PRE) or after (POST) the
EXPOSURE interval.
a.
PRE mode: Delays the start
of the shutter EXPOSURE interval until the end of the
DELAY interval.
b.
POST mode: The DELAY timer is triggered at the conclusion of the EXPOSURE
interval.
c.
In PRE or POST the DELAY (AUX) output will go high for the duration of the DELAY
interval when the DELAY timer is active.
12.
POWER
LED Indicator:
Red LED, when lit indicates the unit is powered.
13.
SHUTTER FUSE
.
Replace with 5 x 20 mm, 0.6A time-lag (slo-blo) fuse.
Please note:
This fuse may fail if the shutter is operated at an excessive frequency and duty cycle
to protect the coil from premature failure. If the operation of the shutter used is causing
“nuisance blowing” of this fuse, please contact technical support to discuss your application.
14.
N.O./N.C.
Toggle switch:
The N.O./N.C. switch acts to invert the shutter operation. The position of this switch determines
shutter status before a trigger signal is received by the VMM-T1.
a.
N.C. (Normally Closed): The shutter will be closed and commanded to open by an input
pulse signal.
b.
N.O. (Normally Open): The shutter will be open and activated to close by an input pulse
signal.
c.
Any RESET command will return the shutter to the position determined by the N.O./N.C.
switch.
d.
Please note if an OPEN command is sent to the RS-232C input, a RESET command will
not clear the RS-232C output and the shutter will not close. A CLOSE command must be
sent to allow the shutter to close. If it is desired close the shutter or return it to the state
set by the N.O./N.C. switch with a RESET command or by the RESET switch, the shutter
must be opened with a trigger command.)
15.
DELAY
MULTIPLIER switch:
A 5-position rotary switch. Clockwise rotation increases the magnitude of the DELAY interval
by a factor of 10.
Summary of Contents for VMM-T1
Page 1: ...User Manual VMM T1 Shutter Driver Timer 14 0020 Version 2 00 2013 1 800 828 6972 ...
Page 17: ...VMM T1 User Manual 17 VINCENT ASSOCIATES A V Figure 2 VMM T1 Front Panel Operator Controls ...
Page 18: ...VMM T1 User Manual 18 Notes ...
Page 22: ...VMM T1 User Manual 22 Figure 3 VMM T1 Rear Panel Operator Controls and I O ...
