Druckwächter, Druckbegrenzer - FEMA Honeywell
Druckwächter, Druckbegrenzer - FEMA Honeywell
Druckwächter, Druckbegrenzer - FEMA Honeywell
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5. Pressure monitors in intrinsically<br />
safe control circuits<br />
(Ex-i)<br />
according to chapter 5.7 of EN 60079-<br />
11:2007, “Simple electrical apparatus”<br />
l<br />
Fig. 13. Connection layout<br />
Gold contacts SPDT<br />
Switching differential not adjustable.<br />
Wiring diagram valid for maximum<br />
pressure monitoring.<br />
At rising pressure, contact 1–3 opens and<br />
2–3 closes.<br />
Installation only in combination with a<br />
suitable EC-type tested switching<br />
5. Pressure monitors in intrinsically safe control circuits (Ex-i)<br />
amplifier. Amplifier must be installed<br />
outside the Ex-zone. Wiring diagram of<br />
switching amplifier and valid installation<br />
guidelines for Ex-I circuits must be<br />
observed.<br />
Maximum switching load: 24 VDC, 50 mA<br />
Minimum switching load: 5 VDC, 2 mA<br />
Operation of pressure switch only within<br />
allowed specification limits! During<br />
selection of suitable switching amplifier<br />
and planning of wiring lengths, the<br />
following parameters must be observed:<br />
U i = max. 24 VDC L i = negligible<br />
I K = max. 50 mA C i = negligible<br />
Type of Ex-protection<br />
II 1/2G Ex ia IIC T6 Ga/Gb<br />
II 1/2D Ex ta/tb IIIC T80°C<br />
50 MU2B-0264GE51 R0712B
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