Ethernet Pulse-Rate Totalizer & I/O

Millennium ETH Ethernet pulse-rate totalizer board

Millennium ETH board — 72 mm × 80 mm

Overview

Pulse counting and I/O on any Ethernet network

A network-addressable pulse-rate totalizer and I/O module that connects pulse-output sensors and discrete signals directly to an Ethernet network. It counts and measures pulse rate on an optically isolated input, provides digital and analog I/O, and is accessed using either a simple ASCII/TCP protocol or Modbus TCP — selected by an onboard jumper.

The 56-bit non-volatile totalizer retains its count through a power cycle. Rate calibration is field-adjustable and stored non-volatile, and firmware is field-updatable over Ethernet through a resident bootloader.

Design scope: circuit and PCB design, embedded firmware, and bootloader.

Specification Sheet (PDF) ↓ ▶ Video Walkthrough

0.5 Hz – 30 kHz

Pulse input range

56-bit

Non-volatile totalizer

4 AI · 3 DI · 3 DO

Analog & digital I/O

12 / 24 VDC

Input power

Specifications

Technical detail

Pulse / Totalizer Input

Signal	5 to 24 VDC, optically isolated
Frequency range	0.5 Hz to 30 kHz
Min. pulse width	> 33.33 µs high / low
Totalizer	56-bit, non-volatile; retained through power loss
Max count	72,057,594,037,927,935
Rate measurement	8 MHz timebase (0.125 µs resolution)
Rate calibration	Field-calibratable; stored non-volatile

Digital & Analog I/O

Digital inputs	3 ch, 5–24 VDC, optically isolated
Digital outputs	3 ch, optically isolated, open-collector
Analog inputs	4 ch, 0–5 VDC
Isolation	Optical on pulse, digital in, and digital out; separate user commons for inputs and outputs

Communications

Interface	Ethernet 10/100, RJ45
Protocols	ASCII/TCP or Modbus TCP — jumper selected
IP address	Field configurable
Firmware update	Over Ethernet; resident bootloader verifies each image before activation

Power & Physical

Input power	+12 or +24 VDC; reverse-polarity protected
Current draw	< 130 mA at 24 VDC
Board size	72 mm × 80 mm
Form factor	Board-level PCB; optional DIN-rail mounting
Connections	Screw (cage) terminal blocks

Terminal connections and full application notes are in the specification sheet (PDF) →

Applications

Typical uses

Energy Submetering

Pulse-output kWh meters to PC-based energy logging, SCADA, or building management systems.

Flow Measurement

Turbine, gear, or paddle-wheel flowmeters connected directly to the network; Modbus TCP for PLC and SCADA integration.

Run-Hour & Production Counting

Non-volatile count for pumps, compressors, fans, conveyor drives, and batch counting.

Fuel & Fluid Dispensing

Batch totaling for fleet fuel, chemical dispensing, and lubrication systems over plant Ethernet.

Industrial IoT / Edge

Isolated pulse, analog, and digital data into Ethernet controllers, edge gateways, or IoT platforms via Modbus TCP.

Remote Monitoring

Remote or panel installations accessible over any IP network, with field-configurable IP and firmware updates.

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