173
RESET MODE & CYCLE SWITCHES
S4 - ON:
ENABLES Front Panel Reset Button
OFF:
DISABLES Front Panel Reset
S5 - ON:
AUTO RST* - Causes counter to automatically reset upon reaching
the preset count. Reset may be instantaneous or maintained for the
duration of the output time delay. (See S6)
OFF:
MAN. - Counter will reset only in response to Front Panel Button
(if ENABLED) or Remote Reset ( R).
S6 - ON:
T.D. RST* - Counter automatically resets at preset (with S5 ON) and
is held at reset for duration of time-out.
OFF:
INST* - Counter automatically resets at preset (with S5 ON) and is
instantly ready to accept new counts.
S7 - ON:
LATCH - causes outputs to latch after reaching preset. Outputs stay
ON until manually reset by Front Panel Button or Remote Reset.
OFF:
T.D. - Allows outputs to respond to normal time delayed dropout.
S8 - ON:
R.T.P. (Reset-to-Preset) - Counter resets to the number entered in on
thumbwheel Preset Switches, and outputs activate when count
reaches zero. (Jumper req’d from U/D to B for down counting.)
OFF:
R.T.Z. (Reset-to-Zero) - Counter resets to zero and outputs activate
when count reaches number entered on T.W. Preset Switches.
*
Remote reset ( R) and Front Panel Reset (if ENABLED) will always take
precedence and reset the counter regardless of automatic setup mode used.
NO. OF
PART NUMBERS FOR
MODEL NO.
DESCRIPTION
DIGITS
AVAILABLE SUPPLY VOLTAGE
230 VAC
115 VAC
SCD
100 KHz 1-Preset
4
SCD00411
SCD00401
Counter w/Display
6
SCD00611
SCD00601
For more information on Pricing, Enclosures & Panel Mount Kits refer to the
RLC Catalog or contact your local RLC distributor.
ORDERING INFORMATION
MODEL SCD INPUT/OUTPUT CONNECTIONS & PROGRAMMING SWITCHES
TYPICAL APPLICATION CONNECTIONS & SET-UP
A Preset counter application using photo-electric sensing to count products
making up a
“batch” (case, carton, bundle or other group)
. At the end of each
“batch”, “SNK OUT”
output actuates a bundler and the
“SRC OUT”
output
signals a Model SCT which totalizes batches. Terminals
“A”
and
“B”
of Model
SCT are paralleled with SCD to share load.
RESET CYCLE MODES - SWITCHES S5, 6, 7 & 8
Reset cycle modes below are shown for Reset-to-Zero action
(RTZ, S8-
OFF)
where the reset returns the count to zero and the counter then counts up,
activating the outputs at the preset value. Reset-to-Preset action
(RTP, S8-ON)
is just the reverse, and a reset loads the preset value in the counter, the counter
counts down (jumper from U/D to B required) and activates the outputs when
the count reaches zero. The reset cycle modes for RTP action are identical to
those described below if the terms “zero” and “preset” are interchanged and
with the one exception that 1msec is required after reset
(instead of 7.5 µsec)
before a new cycle count can be accepted.
MODE 1 LATCH AT PRESET, MANUAL RESET
Counts from zero, activates and latches outputs ON at preset.
Front panel button
(if enabled)
or remote reset (Term. “R”),
returns counter to zero and deactivates outputs. Accepts new
count pulses 7.5 µsec after reset is removed.
MODE 2 MOMENTARY OUTPUT AT PRESET, MANUAL RESET
Counts from zero and activates outputs momentarily at
preset. Momentary output time is adjustable from 0.05 to 1
second. Count can proceed upward if not reset, and if count
direction is then reversed, by pulling U/D down to B, the outputs will again
reactivate as the count decrements down through preset a second time. Output
activates each time count passes through preset provided time-out from the
previous pass has concluded. Front panel reset
(if enabled)
or remote reset
( R) returns the counter to zero and interrupts output if time-out has not
concluded. Unit is ready to accept new counts 7.5 µsec after removal of reset.
MODE 3 AUTOMATIC CYCLE - RESET & RUN AT PRESET
Counts from zero, activates outputs momentarily at preset
and simultaneously resets counter to zero, ready to accept new
counts for next cycle 7.5 µsec after resetting. Momentary output
time is adjustable from 0.05 to 1 sec. Output ON-time must be less than time
required to count from zero to reset for proper Mode 3 operation.
MODE 4 AUTO. CYCLE - RESET & RUN AFTER TIME-OUT
Counts from zero, activates outputs momentarily at preset.
Counter resets at preset, holds in reset for duration of time out,
and will accept new counts 7.5 µsec after time out concludes.
*
- Switch 6 may be either ON or OFF.
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