Function And System Design - Endress+Hauser Cerabar T PMP 13 Technical Information

Measuring principle
Measuring system
Measured variable
Measuring range
Output signal
Load
2

Function and system design

PMP 135 with analogue output
The process pressure acting upon the metallic separating diaphragm of the sensor is transmitted
to a resistance bridge via a fluid. The change in the output voltage of the bridge is proportional to
the pressure and can be measured directly.
PMP 135 with switch output
The process pressure acting upon the metallic separating diaphragm of the sensor is transmitted
to a resistance bridge via a fluid. A differential amplifier creates a standard signal from the pres-
sure-proportional change in output voltage of the bridge. A comparator with an adjustable hyste-
resis compares this signal with the pre-set switch point and then activates the transistor output
and the LED display.
Cerabar T PMP 135 pressure transducer with
•
4...20 mA analogue output.
Power supply, e.g. with RN 221N transmitter power supply unit from Endress+Hauser
•
Switch output.
Preferably in connection with programmable logic controllers (PLC). Positive signal at electro-
nics switch output (PNP).
A = analogue output with transmitter power supply unit ➀
B = switch output with load ➁, e.g. PLC, DCS, relay
Input
The measured variable for the Cerabar T PMP 135 pressure transducer can be selected as either
gauge pressure or absolute pressure.
Measuring ranges up to 40 bar or 500 psi, see "Ordering information" section.
Output
Analogue output
4...20 mA
≤ (U
R -12 V) / 0.02 A (U
B S S
= power supply)
Cerabar T PMP 135
P01-PMx13xxx-14-xx-xx-xx-001
Endress+Hauser