Xylem HYDROVAR Smart - Manual (Page 12)

12
3.4 Pressure transducer PA-22S (4-20mA)
The sensor of this transmitter is a piezoresistive silicon pressure sensor, mounted on a tape
(TAP) freely floating in an oil chamber. The pressure is transferred to the sensor by a
separate steel diaphragm in the oil chamber.
Specification
Range (FS): 10 bar 16 bar 25 bar 40 bar
Max. pressure – P
max
: 20 bar 30 bar 50 bar 80 bar
Class of protection IP 67
Output signal:
4...20 mA; 2-wire
Supply: 8 – 28 VDC
Operating temperature: -10...80°C compensated (max. –40...135 °C)
Storage temperature:
-40...135°C
Cable length: 2 m (screen)
Material:
Body: 1.4435
Diaphragm: 1.4435
Thread: G ¼“
Measures in mm
Note: To guarantee the protection class IP67, the rubber gasket has to be
mounted between the pressure transducer and the plug!
4 Control Terminals and Display unit
All externally used cables must to be shielded. Do not connect the ground of the electronic
components to other potentials (all electronic ground and GND of the RS 485-interface are
connected together internally).
Electrical connection:
White = Analogue output signal (+ Out) (1)
(2) not used
Brown = Supply voltage (+ VCC) (3)
Gasket Viton ®
Pressure transmitter
Gasket
Plug / cable