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Universal Tachometer TDP-4921/4931 (Digital Panel Meter / Signal Converter / Indicator Alarm Meter / Rotary Pulse Meter)

Key Specifications
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Catalog
Dimensions
DXF Data
Inquiries
User Manual
Software

The Long-Running TDP-39 Has Further Evolved.
Fully Backward Compatible, Enhancing Performance While Maintaining Ease of Use.

- Accepts open collector, voltage pulse, and AC signal inputs from various sensors to operate as a frequency meter, tachometer, flow monitor, speedometer, and more.

- Supports A/B-phase encoder inputs, up/down separate pulses, and direction signals to enable reversible measurement.

- Equipped with a 2-channel comparator output as standard.

- Optional features include analog outputs and RS-485 digital communication, allowing the unit to serve as a core control device.

- Offers superior performance compared to the legacy 39 series, featuring enhanced input frequency range, elevated input resolution, accelerated analog output refresh times, advanced analog resolution, and full compatibility with LINKSHIP configuration software.

TDP-4921
TDP-4931

PeriomaticTM Computation Exceptional accuracy from ultra-low to high speeds. Securely tracks rapid speed changes and abrupt stops.


What is PeriomaticTM?

Moving Average

Chatter Suppression Eliminates pulse input chattering noise

Dual Range Allows independent configuration of two distinct calculation rates

Standard Specifications

Compatible with a Wide Range of Input Signals

In addition to single-phase signals such as open collector, contact pulse, voltage pulse, and AC, it also natively handles A/B-phase, up/down separate pulses, and direction signals.
Reversible/reverse rotation measurement is fully operational during 2-phase input.

Universally compatible with diverse pulse-output sensors, including magnetic gear speed sensors, electromagnetic pickups (generating types), flow sensors, rotary encoders, photoelectric sensors, and linear scales.

COCORESEARCH Gear Speed Sensors
COCORESEARCH Electromagnetic Pickups
Flow Sensors
Rotary Encoders
Photoelectric Sensors
Linear Scales
Now supporting isolated inputs & line driver inputs
> View Product Page
Continuous RS-232C data output: Please contact us for support
> View Inquiry Page

Wide-Range & High-Precision Measurement

Measures inputs from 0.0006 Hz to 4 MHz (single-phase) / 0.0006 Hz to 1 MHz (A/B-phase) seamlessly without requiring manual range switching.
Input resolution has been enhanced to 26 ns, and display accuracy has improved to 5 ppm ± 1 digit.

High-Speed, High-Precision Analog Output

The optional analog output module resolution is increased to 16-bit, achieving a ultra-fast output refresh time of 0.5 ms.

Settings can be easily modified using the 4-key button interface situated behind the front panel or via LINKSHIP configuration software for PC.

A) COCORESEARCH's proprietary mounting mechanism: Single operator installation from the front panel.
B) The front bezel can be removed without tools by pressing the left and right release levers.

TDP-4921 Front Panel with Bezel Removed

C) Input signal indicator LEDs
D) Individual ID node switches for multi-device configurations *Active only with RS-485 option
E) HIGH comparator status LED
F) LOW comparator status LED
G) ENTER button
H) Value adjustment button
J) Digit selection button
K) MODE button

Two Configuration Formats Available

We offer the TDP-4921 configured via internal push buttons, and the TDP-4931 equipped with prominent digital thumbwheel switches.
TDP-4921

Set comparator limits and values via internal push buttons

TDP-4931

Set comparator thresholds instantly via digital thumbwheel switches

LINKSHIP Configuration Software

Allows efficient management of parameter settings and generation of profile printouts. Configure parameters by connecting a PC to the onboard RS-232C port via a dedicated communication cable (such as the CSS-M06 listed below).
TDP-4921/4931 Rear View
CSS-M06D09 Cable Series
LINKSHIP Interface
Parameter Profiling & Printing

Dual Range Function

Allows saving two independent calculation rates.
Toggle inputs to switch between two different process operations, or display two separate scaling units using a single sensor setup.
> Learn More

2-Channel Comparator Output

Equipped with a 2-channel comparator output as standard. Features solid-state PhotoMOS relays compatible with both AC and DC loads, eliminating contact chattering and making it ideal for interfacing with PLCs and computers.

Advanced Averaging Functions

Supports input pulse division, time averaging, and moving averages to provide robust filtering and highly optimized measurement baselines.
> Learn More

3 Data Hold Modes

Select between Current, Minimum, or Maximum value hold modes to lock and maintain data values across display profiles, digital outputs, or optional analog output paths.
> Learn More

[Current Value]
Locks value at a specific timestamp

[Minimum Value]
Updates only when a lower limit is met

[Maximum Value]
Updates only when a higher limit is met

RS-232C Communication

Enables seamless transfer of captured tracking logs to a computer or direct communication with LINKSHIP configuration software.

*Requires an optional RS-232C communication cable (sold separately). Models: CSS-M06D09 (D-SUB 9-pin) or CSS-M06D25 (D-SUB 25-pin).
Cable Length: 2.5m
*Regarding continuous RS-232C streaming output capability, please contact us directly.

Options

2-Channel Extended Comparator Module

Adds 2 additional channels to the baseline 2-channel comparator setup, allowing up to 4 total independent HIGH/LOW comparator output stages.

4 Analog Output Varieties

Select from four available factory profiles: 0-10V, 1(0)-5V, ±10V, or 4(0)-20mA (specify model upon ordering), featuring a fast 0.5 ms update rate.

BCD Parallel Output

Outputs 6-digit parallel signals with polarity via open collector, TTL, or CMOS interfaces.
Simplifies connection architectures to sequencers, large-scale displays, and digital printers.
*With BCD connector assembly attached

Enclosure Customization & Multi-Chassis Integration [Custom Options: Please Consultation Us]

> View Case Studies
■ Scale measurement options & channel configurations freely ■ Convenient, simple, and cost-efficient ■ Functional adaptions for power grids, specialized output voltages, or custom network buses.
■ Available from single-unit runs ■ Calibrated as a fully integrated turnkey sub-system ■ Calibration data certificates & traceability charts issued upon request.

Enclosure Assembly

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Enclosure Assembly

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Multi-CH Boxed Unit

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Multi-CH with Indicator

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HDMI Out + Software

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Rackmount Integration

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Related Products

For Flow Measurement
Flow Sensor List >

For Rotation Measurement
Gear Sensor List >

> Inquiry Form