PC-45X(E2)
Page1
Texmate, Inc. Tel. (760) 598-9899
NI-CAD Battery Back-Up, Capable of Signal Powered Operation.
ORDERING INFORMATION
Order Part No.
STANDARD 1999 COUNTS EVENT COUNTER
PC-45X
ACCESSORIES: Edge Connector (20 pin solder tabs)
CN-L10
DESCRIPTION
Texmate's model PC-45X event counter/totalizer
is a versatile, low cost DC powered LCD meter which
features three user programmable count inputs and
count rates. All count inputs are compatible with open
collector sensing devices. The standard low range
SPST or SPDT dry contact closure rate is 0~6000 CPM
(0~100 CPS). The SPST switch input mode utilizes a low
pass filter and a Schmitt trigger with 15% hysteresis for
debouncing. The SPS T switch input mode which utilizes
an R-S Flip-Flop for debouncing can accept high speed
dry contact closure rates of 0~600,000 CPM (0~10,000
CPS) if the low pass filter is reduced or eliminated. The
PC-45X also accepts 3-30VDC positive going pulses
or AC signal inputs up to 15MHz. A 500mV hysteresis
aids the accurate counting of slow changing waveforms.
Other features include logic controls such as inhibit,
reset, display hold, carry output, overrange output, and
outputs to continuously trickle charge an external user
supplied Ni-Cad battery back-up which will prevent loss
of data in case of intermittent or power-out situations.
The unit is also capable of being programmed for sig-
nal powered operation. There are four programmable
decimal points, and unlimited cascading to achieve
multiples of four digits using two or more PC-45X units.
In this type of operation only the left most meter will
display a fifth digit.
The display hold feature enables the user to latch
the display while the counter continues counting. With-
out affecting the latched display, the counter may be
reset to zero by the reset control or the counting function
may be stopped and started by the inhibit control. When
the Display Hold is released, the data present in the
counter at that time is instantly displayed.
With external logic control, the PC-45X may be
used as a frequency counter, RPM indicator or period
counter. The large 0.48" LCD display has excellent read-
ability in both high and low ambient light conditions,
and its low power consumption 5VDC-2mW or signal
powered operation makes it especially useful in remote
locations.
When PC-45X is programmed for signal powered
operation (9 to 600V p-p @ 400µA), the back-up bat-
tery must be used unless the input signal pulses are
continuous because power is required to maintain the
count logic.
SPECIFICATIONS
COUNT INPUTS
SPST Contact Closure
: 0~6000 CPM (100Hz) with 500Hz Low Pass
filter and Schmitt Trigger set at 15%
Hysteresis
SPDT Contact Closure
: 0~6000 CPM (100Hz) with 500Hz Low Pass
filter and R-S Flip-Flop. 0~600,000 CPM
(10kHz) with filter removed
3-30V AC or DC Pulse:
0~500kHz with Schmitt Trigger threshold of
2V and 500mV Hysteresis. If the internal
100kΩ overvoltage protection resistor is
removed the max count is 0~15MHz
Open Collector Sensing:
All inputs are compatible with open collector
sensing devices
Over Voltage Protection:
Pins 6, E & F are protected up to ±100V peak
overload with internal 100kΩ resistors.
Caution:
All other input or control pins are
NOT PROTECTED against High Voltage.
CONTROLS & OUTPUTS
Reset:
Dry Switch closure to ground or Logic Low "0"
input for min. 3µS resets counter to zero.
(50µA pull-up current is provided).
Inhibit Count:
Dry Switch closure to ground or Logic Low "0"
input will prevent the D flip-flop on the count
input from operating (10µA pull-up current is
provided)
Display Hold:
An Open input or Logic High "1" input on this
pin "freezes" the display while the counter
continues to operate independently. A Dry
Switch closure to ground or Logic low "0" input
for min. 3µS updates the display (10µA pull up
current is provided.) For continuous display of
the counter input the display hold function
should be connected to ground
Carry Output
:
Internal solder pad SP2 provides a logic signal
ouput that occurs each 10,000 counts for cas-
cading the count in 4 digit mutilples
Overrange Output
:
Internal solder pad SP1 goes to Logic High "1"
when the count exceeds 20,000 counts
Display:
0.48" LCD Max. 19999
Decimal:
User programmable to 4 positons
Overload Indications:
All digits blank except decimal points
Back-Up Battery:
200µA output is provided to trickle charge a
user supplied 3.6V Ni-Cad battery
Power Requirements
:
Regulated 4VDC to 6VDC at 400µA or Signal
Powered
Operating Temperature: -20˚C to +60˚C
