8 digit counter with up/down input modes can preset count value or length, and simultaneously display the total count, counting length and batch value in real-time. The digital counter is designed for counting number/length/batch, position control of balers controlled by variable frequency motor, and measuring height, position and angle.
- 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 pulses, grating, proximity sensors, photoelectric sensors, contact switches, encoders, etc. (NPN, PNP).
- Output: 8 kinds of output modes to select, up to 3 segments of 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 equipment.
In the digital system, the counter mainly counts the number of pulses to realize the functions of measurement, counting and control, and also has the function of frequency division. Digital counters are widely used in various fields, including industrial production, digital systems, traffic signal control, paper cutter positioning and elevator positioning and speed regulation.
||AC 90-260V, or AC/DC 12-30V/DC 24V, power dissipation≤5VA
||Pulse signal, square wave, sine wave, 5V≤H≤30V, 0≤L≤2V, rising edge trigger, frequency: 0.01~9KHz (square wave)
||≤5000 CPS (switching input, software selectable), ≤2000Hz (encoder input)
|Display counting range
|Ratio setting range
|Relay output method
||R, N, C, F, H, L (count), upper and lower limits alarm, capacity AC 250V/3A, DC 30V/3A COSΦ=1
||4-20mA, 0-10V, etc. (range can be set)
||≥100MΩ (between DC 500V power terminal and external terminal)
||AC 1500V 1min (between power terminal and external terminal)
||Ambient temperature: 0~50°C, relative humidity: 35~85%RH
|External power supply
||DC 12V±5%, 50mA max / DC 24V±5%, 30mA max
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 a 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.
Q1: What is a digital counter?
Counting is one of the simplest and most basic operations. In digital logic and computing, a counter is the logic circuit that implements this operation. In digital systems, a counter mainly counts the number of pulses for measurement, counting, control, and other functions. It also has a frequency division function. A digital counter consists of a basic counting unit and some control gates. The counting unit consists of a series of various flip-flops with the function of storing information. These flip-flops include RS flip-flops, T flip-flops, D flip-flops and JK flip-flops. Counters are widely used in digital systems. For example, in the controller of an electronic computer, the next instruction is taken out sequentially by counting the instruction address. The operation unit records the number of additions and subtractions when multiplication and division operations are performed. A counter can be used to indicate the operating status of a product. In general, it is mainly used to indicate how many copies of the product have been folded and sorted. Its main indicator lies in the number of bits of the counter, commonly 3 and 4 bits. Obviously, a 3-digit counter can display up to 999 and a 4-digit counter can display up to 9999.
Q2: How to choose a digital counter?
- The choice of the built-in crystal oscillator.
- The resolution of the digital counter.
- Large screen touch design.
- The counter has more measurement functions.
- Internal crystal oscillator calibration function.
- The communication interface of the counter should be as many as possible.
- Wide measuring range
Q3: Types of counters
- According to whether the flip-flops in the counter are flipped at the same time, the counter can be divided into two types: synchronous counter and asynchronous counter.
- According to the increase and decrease of numbers in the counting process, the counters can be divided into addition counters, subtraction counters, and reversible counters. It is an up counter that keeps increasing with the clock signal, and a down counter that keeps decreasing. A counter that can be incremented or decremented is called a reversible counter.
The most commonly used is the first one because it allows people to know at a glance what triggering method this counter is so that designers can design circuits.
Tips: Digital counter applications in traffic signal control
Digital counter is widely used to control traffic lights, it can be used to count pulses, and then control traffic lights regularly, which can realize a simple, stable and reliable timing control function.
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