|
|
|
|
Interface modules
|
|
|
|
Analogue Interfaces convert a value such as that from temperature, pressure, flow or speed sensors and electrical measurements into a standard signal that a processor (CPU) can read. (i.e. 0-10V, 4-20mA) They also allow the connection distance between a sensor and the measurement device to be increased: e.g. between a thermocouple and a programmable controller.
Measurement signals for thermocouples and PT100 probes.
Because of the low-level signals produced by thermocouples (µV) and Pt100 (mV) probes it is difficult to transmit these signals over long distances without encountering problems of interference, signal reduction or errors.
|
|
|
|
| |
|
-
4-20 mA current loops transmitted over a long distance are less sensitive to interference than low level voltage signals from sensors.
- signal reductions during transmission (resistance) of voltages do not occur.
- the cables used to connect the converters to process equipment (programmable controllers) are standard cables, which are more cost effective than extension cables or compensation cables suitable for low level signals for Pt100 probes or thermocouples.
|
|
|
Connecting Zelio Analog converters close to the sensors resolves these problems :
- Pre-set input and output scales, requiring no adjustment.
- Outputs protected against reverse polarity, overvoltage and short circuits.
- Powered by 24VDC.
- Sealable protective cover.
- Din rail or panel mounting.
- LED status indication.
- Input and output selector switches on the front panel.
- Output with fallback value if no input signal is present (e.g. due to failure of a sensor)
- CE, GL, UL and CSA certification.
|
|
|
| |
| More information/downloads |
|
|
|
|
|
|
|
|
|