Glossary - D

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Deadband/hysteresis

(Hysteresis) In a digital controller, there may be one switching point at which the signal increases and another switching point at which the signal decreases. The difference between the two switching points is hysteresis.

DeviceNet

Is a digital, multi-drop network that connects and serves as a communication network between industrial controllers and I/O devices. Each device and/or controller is a node on the network.

Dual Power Supply

For example the SGA/A can have a Dual Power Supply. An AC supply can be connected along with a DC supply for additional security.

Digital Load Cell Indicators

The digital load cell is a combination of the conventional analog load cell (usually strain gauge based) and the digital electronics that was previously housed remotely. Therefore the digital load cell is technically a hybrid product.
http://www.mantracourt.co.uk/products/Amplifiers_Digitisers/DCell

DIN Rail

A DIN rail or top-hat rail is a standardized 35 mm wide metal rail with hat-shaped cross section. It is widely used, especially in Europe, for mounting circuit breakers and industrial control equipment inside equipment racks.

Drift

A change of a reading or a set point value over long periods due to several factors including change in ambient temperature, time, and line voltage.

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