12-channel signal acquisition device for frequency, duty cycle and pulse counting with local LCD display and isolated RS485 Modbus RTU communication.
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12-channel signal acquisition device for frequency, duty cycle and pulse counting with local LCD display and isolated RS485 Modbus RTU communication.
The page is written for engineering companies, system integrators, device manufacturers and B2B project procurement teams.
Separate frequency, duty-cycle and pulse-count requirements for periodic and counting signals. Voltage waveform acquisition and equipment contact-state acquisition use their respective modules.
Plan multi-channel voltage acquisition by signal range, sampling requirements and the host system. Frequency counting and energy metering are different measurement tasks with separate device choices.
View product detailsInput modules collect contacts and equipment states; they do not drive loads. Select by input count and cabinet layout, and add an output controller when equipment switching is required.
View product details| Input channels | 12 channels |
|---|---|
| Input type | NPN |
| Input signal voltage | DC6–36V |
| Pulse frequency range | 100Hz–80kHz |
| Frequency accuracy | 5‰ |
| Duty-cycle range | 0–100% |
| Duty-cycle accuracy | 5‰ |
| Communication interface | Isolated RS485 |
| Protocol | Modbus RTU |
| Supply | 12V |
The instrument acquires twelve digital signals. Frequency describes pulse rate, duty cycle describes the active portion of a period, and count records accumulated pulses. Name channels by speed, flow or counting purpose, then apply the corresponding engineering conversion in the host system. These are distinct measurements and should remain clearly identified.
NPN inputs accept the specified DC6–36V signal range, with isolated RS485 Modbus RTU for PLC, HMI or gateway access. Match source output type, level, common and frequency range, and keep a terminal register. Pulse counting should not be treated as multi-phase encoder position decoding or closed-loop motion control.
The LCD supports field inspection, while the host polls values for trends or production totals. RPM conversion requires pulses per revolution; flow totals require the pulse factor; production counts require a defined event. Store those factors with the equipment name so replacements and reporting retain the same meaning.
Use the source’s pulses per revolution in the PLC or host conversion. Frequency and RPM are not directly interchangeable.
No. It acquires frequency, duty cycle and counts. Multi-phase position decoding or motion control requires suitable dedicated equipment.
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