Measure and control over Ethernet
DGH has introduced a line of data-acquisition modules with seven input channels for use in monitoring or process control. The D7000 series communicate over Ethernet to a host computer using the Modbus TCP/IP protocol. Because these modules communicate over a network, you can design distributed systems for monitoring phenomena such as temperature, pressure, flow, and just about anything else that uses a sensor. By adding analog and/or digital output modules, you can creates a control system.
Several models in the D7000 series include the models for analog inputs (16 bit), analog outputs (12 bit), and digital I/O.
- D7100: Voltage (±25 mV, ±50 mV, ±100 mV, ± 1V, ±5 V, ±10 V) inputs.
- D7200: Current (±20 mA).
- D7300: Temperature (J, K, T, E, R, S, B, and C thermocouples)
- D7400: A universal input module that's programmable to accept voltage, current or thermocouple inputs.
- D7500: Two analog outputs (voltage or current)
- D7710: 15 digital inputs
- D7720: 15 open-collector digital outputs
- D7730: 7 digital inputs, 8 digital outputs
Software support includes LabVIEW, DasyLab, WinWedge, and an API, among others. DGH also offers a free configuration utility.
Competing with companies such as Dataq and Measurement Computing, DGH has several lines of data-acquisition modules that use Ethernet or USB for communications. The company also produces data converters such as RS-232 to RS-485 and USB to RS-485.
DGH, D7000 series product page.
- Thermocouple physics: Even Jim Williams got it wrong
- 7 data-acquisition systems attach directly to sensors
- Data-acquisition: The key to a smart electrical grid
- Design tradeoffs in data acquisition
- Sound Cards Work in Some Data-Acquisition Applications
- Avoid data-acquisition mistakes
- Friday Quiz: Data Acquisition
- Get the Circuit on Temperature Measurement
- Thermocouples: Simple but misunderstood