Distributed-network data acquisition and control node, for modular process control

Data acquisition, processing and I/O for measurement or process control


This low-cost modular process control system and data acquisition node is ideal for process monitoring, or large distributed-array laboratory measurements. With on-board environmental monitoring sensors and optional board-mounted pressure transducers, these networked modules offer a simple, plug-and-play solution for any distributed sensing need.

Featuring two 16-bit analogue input channels, two user-configurable 16-bit analogue output channels and digital I/O ports, and robust RS-485 networking of up to 255 modules, this system may even be used as a stand-alone control system.


Applications


Distributed sensing and control network

Computer-controlled process-control regulators

Process control

With on-board temperature and pressure sensors, sensors to monitor ambient temperature, pressure and humidity, and user-configurable input and output ports, this system is ideally suited for use in distributed process control applications.

Wind-tunnel laboratory

Wind tunnel measurement

For applications requiring widely-separated sensors, these sensing nodes can minimize noise and interference by locating the acquisition at the points of measurement. Data is transmitted using a single RS-485 line, ideal for instrumentation located in tightly-confined models.

Smog in a city

Environmental monitoring

For applications requiring the monitoring of environmental parameters at many points- such as refrigerated warehouses, pharmaceutical production facilities and laboratories- this system offers highly flexible functionality in a compact and low-cost package.


Features


Board-mounted pressure transducer

Differential pressure sensors with ranges from +/- 25 Pa to +/- 500 Pa available

Two remote temperature sensors

Two +5VDC reference voltage sources provided for remote thermistors or other sensors

Environmental sensor package

Absolute static pressure and local air temperature and humidity sensors for environmental monitoring

2-channel analogue I/O

Two 16-bit analogue inputs and outputs provided for data acquisition and process control

Condensation warning

On-board calculation of dew point for condensation warning

16 bit, 1000 Hz data acquisition

16 bit, 1000 Hz data acquisition for local processing using on-board CPU

USB user interface

Simple plug-and-play USB user interface

Software and drivers included

All software and drivers are included for plug-and-play functionality

Range of enclosures available, or as OEM unit

Enclosures available in plastic and aluminium


Product Details


Capabilities and performance

This unit is intended to be used as a distributed network of independent nodes, each carrying out some measurement and data processing using its on-board 16 MHz CPU, and communicating over a robust RS-485 network.

Bandwidths of up to 150 Hz are possible, and the on-board sensors feature user-configurable calibration adjustments for multi-unit homogenization.

System specifications

  • Physical dimensions: approx. 100 x 50 x 15 mm
  • 2 analogue inputs, 16 bit, 0-5VDC
  • 2 analogue outputs, 16 bit, 0-5VDC
  • 2 digital I/O channels
  • 2 external thermistor channels (or other sensor using +5VDC reference)
  • 1 on-board differential pressure sensor, +/- 25 to 500 Pa
  • RS-485 at 1 MBPS, can stream data at 150 Hz
  • DC power required: 5-24V ESD, surge and reverse-polarity protected
  • On-board 16 MHz CPU
  • Total sensor uncertainty: ~0.5% full-scale
  • Absolute pressure sensor specification: 300-1100 Pa FS, +/- 0.12 Pa
  • Relative humidity sensor specification: 0% – 100% RH, +/- 1%
  • System requirements: Win7 or later, minimum 3GHz & 4Gb RAM recommended

Additional custom modifications available

  • Battery power and wireless telemetry module for remote operation
  • Custom enclosure design service available
  • Custom software and driver development service available
  • Extended product support and warranty available