Compact telemetry interface for sensors WaveBridge DAU-430

Overview
WaveBridge DAU-430 is a compact data acquisition unit that reads 30 digital inputs (up to 300 V AC/DC) and 4 selectable analog inputs. Measurements are published simultaneously as NMEA 0183 over full‑duplex RS‑485 and as Modbus TCP registers. Configuration, calibration and live monitoring are provided via the built‑in web interface.

Short summary
30 digital and 4 analog inputs with isolated groups, NMEA 0183 and Modbus TCP outputs, web configuration and SD firmware update.

Key benefits

• 30 digital inputs up to 300 V AC/DC, isolated in groups of five for safe wiring
• 4 analog inputs, selectable per channel: ±20 mA or ±15 V with individual isolated ground
• Parallel outputs: NMEA 0183 on full‑duplex RS‑485 and Modbus TCP server over Ethernet
• Built‑in web interface for threshold settings, per‑channel calibration and live status
• Channels can be scaled, named and tested remotely (Zero/One test)

System Specifications
Digital inputs | 30 channels, up to 300 V AC or DC each, isolated in groups of five
Analog inputs | 4 channels, ±20 mA or ±15 V selectable per channel, each with its own isolated ground
Serial output | NMEA 0183 on full‑duplex RS‑485
Network | Modbus TCP server and built‑in web interface over RJ45 Ethernet
Firmware update | SD card slot
Supply | 24 V DC (9–36 V), 0.25 A maximum at 24 V
Environment | −20 °C to +55 °C, up to 80% relative humidity, altitude to 5000 m

Interfaces & Integration
Digital channel settings | NO/NC mapping, AC or DC type selection, threshold voltage, live status and individual Zero/One test
Analog channel settings | Voltage or current mode, per‑channel calibration, raw or user‑corrected output values
Modbus registers | Analog values as 32‑bit floats over two registers; digital channels mapped as a 30‑register array (read with function code 03)
NMEA output | Custom digital and analog message identifiers, module identifier, decimal or hexadecimal data section
Daisy chain | Second unit mirrors inputs into slave register range with a ready status register for chained systems
Typical use | Alarm panels, tank and sensor loops, switchgear monitoring and bridge recording systems

System includes

• 1× Data Acquisition Unit — WaveBridge DAU-430 main unit
• 15× 6P terminal block — 3.81 mm green female for digital and analog input groups
• 1× 3P terminal block — 3.81 mm green female for supply
• Quick‑start card, QR card for digital manual and the installation manual (physical documentation supplied)

Technical specifications

• Digital inputs: 30 channels, up to 300 V AC/DC each, isolated in groups of five
• Analog inputs: 4 channels, ±20 mA or ±15 V selectable per channel, each with isolated ground
• Serial output: NMEA 0183 on full‑duplex RS‑485
• Network: Modbus TCP server and built‑in web interface over RJ45 Ethernet
• Firmware update: SD card slot
• Supply voltage: 24 V DC (range 9–36 V), 0.25 A maximum at 24 V
• Operating environment: −20 °C to +55 °C, up to 80% RH, altitude to 5000 m
• Terminals: Pluggable 3.81 mm terminal blocks for inputs and supply