for bourdon tube industrial pressure gauges, ELECTRONIC CONTACTS

direct wiring to PLC / PC direct input andto trigger optoelectronic coupler.Also they are the best preference for oil filled instruments to beinstalled in the most severe operating conditions created by theambient environments.

Electronic contacts with PNP output

Switching accuracy: 1,5 times the instrument accuracy. Switching hysteresis: 0,3...1% of full scale value. Adjustement: over an arc of 270 ° , through the knob placed onfront lens or through removable key. Open contactClosed contact Supply: 10...30 Vdc. Switching current: max 100 mA Temperature range: -25...+65 ° C Electronic contacts are equipped with electrical distancesensors (proximity sensors). The output signal is governedby the presence or absence of a control vane moved by the actual value pointer in the magnetic field of the proximity sensor.The switching behaviour of the PNP switches used in thesecontacts is normally defined as a “closer” (opposite to the inductive contacts). Due to their proximity type of switching, respect to the traditionalsliding contact they offer better switching accuracy and extended service life.They are properly designed to switch small DC load and soparticularly suitable for a WIRING SCHEME

(The numbers shown are the same as thoseindicated on the junction box)

FOR SINGLE CONTACTS... FOR DOUBLE CONTACTS... EX-CONTACT CODETHE PRESSURE RAISING MEANS...

- +- + +- 3 1 2

Opening contact

+- +- 3 1 2

Closing contact

E2E1E11 E22E12E21

+-

1 ° 2 °

-- 3 + + +- 3 4 1 2

Opening contact 1 ° Opening contact 2 °

(each contact must not exceed the next one)

+-

1 ° 2 °

-+- + +- 4 1 2

Opening contact 1 ° Closing contact 2 °

(each contact must not exceed the next one)

+-

1 ° 2 °

- 3 +- + +-

Closing contact 1 °

3 4 1 2

Opening contact 2 °

(each contact must not exceed the next one)

+-

1 ° 2 °

+- +- +- 4 1 2

Closing contact o 1 ° Closing contact 2 °

(each contact must not exceed the next one)

+-

-1-