Products Detail


Auto CounterElectronic Counter
This product is no longer in production or sales.

Easy to see!



-> White LCD display(LED back-light)
-> 7 digits(7-segment, zero-suppress), reset display, overflow display(8th digit can be displayed)
-> Reset key-lock provides
-> It is easy to change reset key-lock and counting speed with slide switch under the counter)


Kinds Addition type total counter
Model No. DC-JA7-AW DC-JA7-DW DC-JA7-V
Power source 100 to 240VAC(50/60Hz) 12 to 24VDC(Ripple 20% or less) -
Fluctuation range 85 to 250VAC 12 to 24VDC±10% -
Power consumption 1.2VA(when 240VAC) 0.7W(when 24VDC) -
Number of digit 7 digits(8 digits with overflow display)
Front size 24×48mm
Display 7-segment LCD(LED back-light) 7-segment reflective LCD
height 9mm, width 2.95mm
Memory function EEP-ROM(Re-writing 0.1 million times or more) -
Counting speed 30Hz/1kHz changeover,
30Hz : contact, transistor, min. signal width 16.7msec(make ratio 1:1)
1kHz : Transistor, min. signal width 0.5msec(make ratio 1:1)
Input signal Contact or open-collector
Impedance when ON(short-circuited): 1k ohm or less
Impedance when OFF(opened): 100k ohm or more
Flowing current when short-circuit: approx. 4mA
Contact or open-collector
Impedance when ON(shortcircuit): 10k ohm or less
Impedance when OFF(opened): 1M ohm or more
Allowable residue voltage when ON: 0.5V or less
Flowing current when short-circuit: approx. 4µA
Ambient temperature/humidity -10 to +50 degrees C(-25 to +55 degrees Cwhen stored), 35 to 85%RH
Insulation resistance 100MΩ or more(500VDC megger) between conducting terminal and uncovered non-charged metal
Withstand voltage 2000VAC/min. between conducting terminal and uncovered non-charged metal
Noise resistance Square-wave noise by noise simulator(Rising 1nsec, width 1µsec)
Common mode 2kV
Vibration resistance Double amplitude 4mm, 16.7Hz (Malfunction : Double amplitude 0.5mm, 10 to 55Hz), each 1 hour in X, Y and Z direction
Impact resistance 294m/s2( Malfunction : 98m/s2) each 3 time in X, Y and Z direction
Starting time when Power-ON 2sec or less -
Protective structure IP66(Only front panel : must be using rubber packing)
Case material Polycarbonate
Weight Approx. 70g Approx. 60g
Accessory Mounting hook, rubber packings

External dimension





Panel-cut dimension

Panel-cut dimension

I/O Circuit


* Use the solderless terminal for M3.
* Use 2-core shield wire or metal wire tube and make it as short as possible. Don't make parallel wiring with power cable or high voltage cable etc.
* Counting input can't be accepted for 2sec after putting power source in.

Input circuit

Input circuit
* Each input circuit of DC-JA series is common use for contact and transistor. Flow current from the counter is approx. 4mA. Use the relay for little current in case of contact input.


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Download List

Category File name File size Date modified Download
Instruction Manual_DC-JA (Japanese and English)