Operators instructions combiview™, type dfon, Atex gas ia and for atex dust ia – Baumer CombiView DFON User Manual
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Operators instructions: 11112759 Page 6 / 8
ATEX Gas ia and for ATEX Dust ia
Operators instructions
CombiView™, type DFON
For ATEX ia Gas zone 0 and ATEX ia Dust zone 20 a zener barrier must separate the hazardous and safe area and must be in-
stalled in accordance with prevailing guidelines for zone 0 / zone 20.
ATEX ia Gas / Dust data:
Approval: Gas Zone 0/1
II 1 G, Ex ia IIC T5 Ga
Dust Zone 20/21
II 1 D, Ex ia IIIC T100°C Da
Voltage drop
U
Disp
4,5 or 6,5 VDC
Temperature class T1…T5 Zone 0 and 20
-20°C…60°C
Zone 1/2 and 21/22 -40°C…65°C
Internal inductivity
L
i
<10 µH
Internal capacity
C
i
<15 nF
Barrier data
U
i
<30 VDC
I
i
<0,1 A
P
i
<0,75 W
Suitable barrier
e.g.: Pepperl+Fuchs, Z728
The display is supplied by the 4…20 mA loop from the transmitter and can thus be placed near the transmitter or near the power
supply, as preferred. However to make the display intrinsic safe a zener barrier must be inserted before the DFON. The transmitter
may be placed inside or outside the hazardous area.
If the CombiView
™
, type DFON is attached to a Baumer transmitter using the UnitCom ribbon cable, it is considered to be an inte-
grated part of the instrument. Please see the ATEX instruction for the relevant instrument.
If the relays are enabled, each relay must be protected by a zener barrier. Use a barrier for each relay or a barrier with multiple
channels. However the two relays must have each a barrier.
Barrier data U
<30 VDC
I
<75 mA
P
<0,75 W
Suitable barrier
e.g.: Pepperl+Fuchs, Z779
1 +
2 -
1 +
2 -
Zener
barrier
Zener
barrier
4…20 mA
4…20 mA
15…30 VDC
15…30 VDC
Display in the zone, transmitter outside the zone
Display and transmitter in the zone
With relay output
With relay output
Display in the zone/transmitter outside the zone
Display and transmitter in the zone
1 +
2 -
3
4
5
6
4…20 mA
15…30 VDC
Zener
barrier
Zener
barrier
Zener
barrier
0…30 VDC
75 mA
0…30 VDC
75 mA
1 +
2 -
3
4
5
6
4…20 mA
Zener
barrier
15…30 VDC
Zener
barrier
Zener
barrier
0…30 VDC
75 mA
0…30 VDC
75 mA
Relay 1
Relay 2
Relay 1
Relay 2