4-20mA Digital LCD Signal Generator with 9-Segment Programmable, Analogue Simulator 2-wire Output System
4-20mA Digital LCD PLC Signal Generator Source Current Transducer with 9-Segment Programmable High Accuracy Load Tester Analogue Simulator 2-wire Output System. 0-9. (4 to 20 MilliAmp) A point-to-point or multi-drop circuit is mainly used in the process automation field to transmit signals from instruments and sensors to a controller. It sends an analogue signal from 4 to 20 mA that represents 0 to 100% of some process variables.
The range of voltage over which the loop will function is called its Compliance Voltage. Common values for 4-20 mA loop supplies are 24VDC or 36VDC. The voltage chosen by a designer depends on the number of elements connected in series with the loop. The term loop-powered simply means that the device in question receives its power from the 4-20 mA process signal connected to the device.
This is possible because the current is the same throughout the 4-20 mA loop, so voltage drops caused by loop-powered devices do not affect the current signal. A 2-wire transmitter is loop-powered, which means it is powered by a low voltage, low current, DC power supply, typically 24V. A 4-20mA current is usually supplied by a distributed control system or other centralized data acquisition hardware and connected to the transmitter via 2 wires.
- Stock: 20
- Model: 4-20-ma-GEN
- SKU: 4-20-ma-GEN
194 samples sold