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4.7 Alarm Interface / Relay with Transformer Isolated Barrier
With the help of a 280X-C-Ex bracket and a transformer isolated barrier it is possible to set up an alarm
indication outside a hazardous area.
R1
D1
white
white
1 2 3
OUT CHK PWR
1
2
3
7 8 9
10 11 12
Relay 24VDC
These kinds of application are permissible only with the transformer isolated barrier
mentioned above. If you are going to use different types of transformer isolated
barriers the legal requirements for an intrinsically safe application are not fulfilled
anymore.
Seite - 12
ECOLOG Ex
Alarm
R2
GND
brown
Cable type: Intrinsically safe
Cable color: Blue RAL 5015
max. length 5m
e.g. Dätwyler
Dataflex CY-EIG
2x2x0.75
brown
OUT: Alarm on
CHK: Lead breakage
PWR: Power supply 24VDC
Transformer Isolated Barrier
Pepperl+Fuchs
KFD2-SR2-Ex1.W
ATTENTION: Interconnection Terminal 8 - 11
+
-
Flash light 24V 7W
Logger TNx:
Bracket: 2804-C-Ex
Terminal 2: GND
Terminal 14: Alarm
Logger TPx:
Bracket: 2801-C-Ex
Terminal 2: GND
Terminal 14: Alarm
Logger THx:
Bracket: 2805-C-Ex
Terminal 2: GND
Terminal 6: Alarm
+
-
Power supply unitl
230VAC/24VDC
500mA
Hazardous area
Zone 1
Safe area
Available as a pre assembled unit:
Part-No 2312
Consist of:
- Housing made of sheet steel
150*150*130mm
- Transformer isolated barrier
- Flash light
- Relay
- 24VDC Power supply unit
D-EZ-7003Bh
5. 2009AG
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