ABB DP840 pulse counter or frequency measurement module

• Measurement range: Pulse counting range 0-99999999, frequency measurement range 0.1Hz-10kHz, meeting the needs of counting and frequency monitoring in different scenarios.​

• Input signal: Supports dry contact, NPN/PNP transistor output and other pulse signal types, with input voltage range 12-24V DC.​

• Measurement accuracy: Frequency measurement accuracy ±0.1%, pulse counting error ≤1 pulse, ensuring accurate and reliable data.​

• Response time: ≤1ms, capable of quickly capturing changes in pulse signals, suitable for high-speed dynamic measurement scenarios.​

• Output interface: 2 relay outputs (capacity 250V AC/5A, 30V DC/5A), which can be used for alarming or controlling external equipment.​

• Communication interface: Equipped with RS485 interface, supporting Modbus RTU protocol, facilitating data interaction with PLC, HMI and other devices.​

• Working environment: Operating temperature -20℃~60℃, relative humidity 5%-95% (non-condensing), protection class IP20.​

• Power requirement: 24V DC±10%, power consumption ≤5W.​

• Dimensions: Width×height×depth approximately 35mm×100mm×110mm, rail-mounted, saving installation space.​

• High-precision measurement: With high resolution and low error characteristics, it can provide accurate data whether for pulse counting or frequency measurement, providing a reliable basis for industrial control decisions.​

• Flexible adaptability: Supports multiple pulse signal input types and a wide voltage range, and can be used with various sensors (such as photoelectric sensors, proximity switches), adapting to different industrial scenarios.​

• Fast response capability: Millisecond-level response time, able to capture high-speed changing pulse signals in real time, meeting the monitoring needs of high-speed production lines and dynamic equipment.​

• Convenient data transmission: Through RS485 interface and Modbus RTU protocol, it can be easily integrated into industrial automation networks to realize centralized monitoring and remote management of data.​

• Robust and durable design: Adapts to a wide range of temperature and humidity, with strong anti-electromagnetic interference ability, ensuring stable operation in complex industrial environments.​

• Manufacturing production lines: Used to monitor the running speed of conveyor belts (through frequency measurement) and product counting (through pulse counting), realizing production progress tracking and output statistics.​

• Material conveying systems: In powder, liquid and other material conveying equipment, calculate material flow and conveying volume by measuring pulse signals of pumps and valves.​

• Packaging machinery: Count the feeding length of packaging materials and the number of packages, and monitor the speed, ensuring packaging accuracy and efficiency.​

• Machine tools: Monitor the rotational speed of spindles and feed axes (frequency measurement) to achieve precise control of the machining process.​

• Energy metering field: Cooperate with flow sensors to measure the flow of water, gas and other energy media, providing data support for energy management.​

• Ensure the module is well grounded during installation to reduce the impact of electromagnetic interference on measurement accuracy.​

• Input signal lines should be kept away from high-voltage lines to avoid signal interference; for long-distance wiring, shielded cables are recommended, and the shield layer should be grounded at one end.​

• The power supply voltage should be stable within the specified range to avoid module damage caused by overvoltage or undervoltage; a regulated power supply can be equipped to improve power supply reliability.​

• Before wiring, confirm that the input signal type matches the module interface to prevent module failure due to wrong wiring.​

• Regularly check whether the module connection lines are loose, clean the dust on the module surface to ensure good heat dissipation and extend service life.​

The structure and details of the product：

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