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Coco TDP-3621 Universal Tachometer/Speedometer

Manufacturer: Coco Research Co., Ltd
Model: TDP-3621

Features

Universal Tachometer/Speedometer TDP-3621 with PLC connectivity, fast 1 ms BCD output, selectable analog outputs (0–10V, 4–20mA), 16-bit resolution, and high-performance F/V conversion for precise industrial measurement and control.

The Universal Tachometer/Speedometer TDP-3621 is designed to connect directly to PLC systems, and fast and accurate measurement data is provided for real-time industrial control. As a result, seamless integration is achieved, while reliable performance is maintained in automation environments.

Moreover, BCD output with a fast 1 ms update is supported, and measurement data can be transmitted efficiently to PLC systems. Therefore, real-time monitoring is enabled, while system responsiveness is improved.

In addition, multiple analog output options are provided, including 0–10V, 0–5V, 1–5V, and 4–20mA, and these outputs can be selected through internal settings. As a result, flexible system configuration is achieved, while compatibility with various industrial standards is ensured.

Furthermore, 16-bit resolution is supported, and high-precision signal conversion is achieved. Therefore, the device can also be used for high-performance F/V conversion applications, while maintaining stable and accurate output.

Overall, the Universal Tachometer/Speedometer TDP-3621 provides flexible connectivity, precise measurement, and reliable output performance, so it is well suited for PLC-based control systems and advanced industrial applications.

Specifications

name	Universal tachometer
Model	TDP-3621
Measurement method	Periomatic™ System

Input frequency range	6mHz to 500kHz
Input Resolution	40ns (25MHz)
Input signal	(1) Single-ended input (NPN open collector, logic, zero-crossing, 2-wire sensor) (2) Differential input (line driver)
Input method	Single-phase pulse
Input level and sensitivity	(1) Logic signal (NPN open collector, logic, 2-wire sensor) High level: 3.9V or higher, Low level: 1V or lower (2) Zero-crossing signal: AC signal passing through 0V of ±60mV or higher (3) Line driver signal: ±1V or higher (differential voltage)
Input resistance	(1) NPN open collector: Pulled up to +12V with approximately 15kΩ, and pulled down to GND with approximately 10kΩ. (2) Logic, (3) Zero crossing: Pulled down to GND with approximately 10kΩ. (4) 2-wire sensor: Pulled down to GND with approximately 900Ω. (5) Line driver: Input resistor 330Ω.
Input voltage tolerance	(1) NPN open collector logic ±50V (2) Zero crossing ±70V (3) 2-wire sensor ±30V (4) Line driver ±25V (differential voltage)
Input pulse width	0.9 μs or longer (both L and H levels)
Trigger Edge	Downward edge
Low-pass filter	LPF circuit 15kHz (-3dB, -6dB/oct), 1.5kHz (-3dB, -6dB/oct)
Sensor power supply	DC12V±10%: 100mA (max) / DC5V±10%: 150mA (max)
Input connector	M3 Free Terminal Screw; Suitable for crimp terminals 5.8mm or smaller.