Digital Counter, 8 Digit, Up/Down, Number/Length/Batch

Digital counter has 8 digit display, 4 kinds of up/down input modes, DC 12V/24V external power supply.

Features:

• Digital counter accuracy: 0.01%, minimum resolution: 0.0001.
• Input/output signals photoelectric isolated, anti-interference ability.
• Input: 4 kinds of input modes, a variety of input signals, various waveform pulse, grating, proximity sensors, photoelectric sensors, contact switches, encoders, etc. (NPN, PNP).
• Output: 8 kinds of output modes to select, up to 3 segments control output, suitable for various control requirements.
• 8 digit display, has external power supply DC 12V/24V/30mA especially for sensor.
• Standard RS232 or RS485 MODBUS RTU communication, can be directly connected with computers, PLC or other equipments.

Specification:

Selection table:

Digital counter up/down input modes:
Mode A: Up (addition)
INA counts up. INB is GATE function. When INB is high level (or shorted with +12V), INA input is forbidden.

Mode B: Up/down (addition or subtraction)
INA counts up. INB is count-down control function. When INB is high level, INA turns count-up into count-down.

Mode C: Up/down (addition and subtraction)
INA counts up, INB counts down.

Mode D: Up/down (for encoder)
INA signal leads INB signal (count-up). INA signal lags INB signal (count-down). It is often used for encoder or grating input.

Wiring diagram:

Tips: Components of digital counter

1. A, B input channels
   The function of the input channel is amplifying and shaping the measured signal to a standard pulse signal.
2. Door
   The gate is a comparison circuit used for quantizing. It can control whether the counting pulse signal can input digital counter.
3. Counting and display unit
   The counting and display circuit is used to count the pulse signal from the main gate and display the result of the counting as a digital form. For easy reading, digital counter usually uses a decimal counting circuit.
4. Time base unit
   The time base circuit is mainly composed of a crystal oscillator, a frequency divider, and a frequency multiplier. The time base circuit is mainly used to generate various standard time signals. The timing signal can be single or multinomial.
5. Control unit
   The function of the control circuit is to generate three control signals of gating signal, registering signal and zero resetting signal. So that various circuit units of digital counter can automatically measure in an orderly process according to the sequence of preparation, measurement and display.