LCD Display Electronic Preset Counter

RC series

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48-mm□ 4-digit 7-segment LED, One-stage Preset, AC Power Supply RC-18

RC-18 - 48-mm□ 4-digit 7-segment LED, One-stage Preset, AC Power Supply





1-level preset counter/timer, DC type

Operation method

Addition, subtraction

Operation mode

Overcount, auto reset

Return method

Manual reset, external reset, automatic reset (in auto reset mode)

Display power

7-segment LED (character height: 12 mm)

Number of digits

4-digit display, -999 to 9,999*1

Power off memory time

Approx 10 years (at 20°C 68°F)

Mounting method

Panel mount (embedding), surface mount, DIN rail mount*2

Highest counting speed

With contacts: 30 Hz, without contacts: 5 kHz (1:1 ON:OFF ratio)

Input signal

No-voltage input (with contacts, without contacts [count input, inhibit input, reset input])


Control output

Relay output: 1c, 250 VAC, 3 A or less (resistive load)

Control output

One-shot output time

0.01 s to 0.5 s (variable)


24 ms or less (when set to 30 Hz), 12 ms or less (when set to 5 kHz)

DC output

12 VDC ± 10%, 50 mA maximum


Power voltage

100 to 240 VAC ±10 %, 50/60 Hz

Power consumption

9VA or less

Current consumption


Environmental resistance

Insulation resistance

100 MΩ or more (tested with a 500 VDC megger) between all the external terminals and the case

Noise resistance

Square wave noise generated by a noise simulator, between the power supply terminals, 2 kV for 1 µs

Environmental resistance

Ambient temperature

-10 to +50 °C 14 to 122 °F (No freezing)

Relative humidity

35 to 85 % RH (No condensation)

Withstand voltage

1,000 VAC for 1 minute (between all the external terminals and the case)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

Shock resistance

100 m/s2, 3 times in each of the X, Y, and Z directions


Approx. 170 g (main unit only)

*1 Display uses the zero suppression method.
*2 Option OP-91867 is required to perform surface or DIN rail mounting.

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