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5. Pressure Monitors in Intrinsically Safe Control Circuits DWR / DGM... -513 / -563
5. Pressure Monitors in Intrin-
sically Safe Control Circuits DWR /
DGM... -513 / -563
according to chapter 5.7 of EN 60079-
11:2012, "Simple electrical apparatus"
1 2 3
l
Fig. 13. Wiring diagram
Gold contacts SPDT. Switching
differential not adjustable. Wiring diagram
valid for maximum pressure monitoring.
At rising pressure, contact 1–3 opens and
2–3 closes.
Installation only in combination with a
suitable EC-type tested switching
amplifier. Amplifier must be installed
58
outside the Ex-zone. Wiring diagram of
switching amplifier and valid installation
guidelines for Ex-I circuits must be
observed.
Operation of pressure switch only within
allowed specification limits! During
selection of suitable switching amplifier
and planning of wiring lengths, the
following parameters must be observed:
U
= max. 24 VDC L
= 100 μ
i
i
I
= 100 mA
C
= 1 nF
i
i
Type of Ex-protection
II 1/2G Ex ia IIC T6 Ga/Gb
II 1/2D Ex ia IIIC T80°C Da/Db
Approvals
ATEX: IBExU12ATEX1040
IECEx: IECEx IBE 14.0077
MU2B-0264GE51 R0220G
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