Operating Instructions
Pressure measurement
CombiPress™
PFMH/N
Fully welded pressure transmitter with touch screen
7.
Electrical connection in explosion hazardous areas
DANGER
Risk of fatal accident due to a wrongly connected sensor
Correct gas and dust protection can only be achieved by meeting their installation requirements.
f
Make sure that all requirements are met and that sensor and installation have a valid approval
for their speci
fi
c explosive atmosphere.
f
Allow only persons trained in explosion protection to perform the installation.
f
Never use FlexProgrammer in explosion hazardous areas.
7.1
Explosive gas/dust atmospheres zone 0, 1 and 2 / zone 20, 21 and 22
The PFMH and PFMN can be used in explosion hazardous areas of zone 0, 1, 2, 20, 21 or 22. Sensors
must be installed with Zener barriers.
Approval for: PFMx-xx.xxxx.xxxxx.xxxxx.x5xx Ex ia IIC T5 Ga and Ex ia IIIC T100°C Da
All PFMH/N with intrinsic safety protection ia
f
Use Zener barriers.
f
Comply with the following temperatures,
connection values and circuit diagram.
f
Use a Zener barrier for each relay if relays are
enabled.
ATEX II 1G Ex ia IIC T5 Ga
ATEX II 1D Ex ia IIIC T100 °C Da
Limit values
Current loop (+Vs,
Iout):
Ui: 30 V DC
Ii: 100 mA
Pi: 0.75 W
Ci: 40 nF
Li: 10 μH
Relay outputs:
Ui: 30 V DC
Ii: 75 mA
Pi: 0.75 W
Ci: 10 nF
Li: 10 μH
Temperature class
T1…T5:
Zone 0
–20 < Tamb < 60 °C
Other zones
–40 < Tamb < 65 °C
1
2
3
4
5
6
Function
Pin
+Vs
1
Iout
2
Relay 21
3
Relay 22
4
Relay 11
5
Relay 12
6
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