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FAFNIR GmbH
Bahrenfelder Str. 19
22765 Hamburg
Telefon: +49 / (0) 40 / 39 82 07-0
Fax: +49 / (0) 40 / 390 63 39
Instructions
TÜV 09 ATEX 374581
Environmental Sensor for Leakage Detection type VISY-Reed …
Edition: 11.2014
I
Range of application
The environmental sensors VISY-Reed ... serve as level detectors in potentially explosive areas. A float
with built-in magnet slides on the sensor tube. It closes or opens a reed contact. A microcontroller
evaluates the contacts and can trigger an alarm in both the open and the closed state.
II
Standards
The equipment is designed in accordance with the following European standards
EN 60079-0:2012
Equipment – General Requirements
EN 60079-11:2012
Equipment protection by intrinsic safety ‘i’
EN 60079-26:2007
Equipment with Equipment Protection Level (EPL) Ga
III
Instructions for safe …
III.a … use
The environmental sensors are designed as intrinsically safe equipment and are suitable for use in
potentially explosive areas. The environmental sensors may be used for all gas groups (IIA, IIB and IIC).
The approval applies to the device versions
VISY-Reed Interstitial Dry
VISY-Reed Interstitial Wet
VISY-Reed Sump Dispenser
VISY-Reed Sump Manhole
III.b … assembling and dismantling
The housing of the environmental sensor must not be opened! Disassembly may damage the envi-
ronmental sensor and its approval expires.
III.c … installation
Wiring work may only be performed with the power disconnected. Special rules and regulations, in-
cluding EN 60079-14 and local installation regulations, must be observed.
When wiring the sensor to the measuring transducer (preferably blue coloured cable), the permissible
inductance and capacitance of the associated equipment must not be exceeded. The terminals of the
sensor must be connected to the same terminals of the transducer. The environmental sensors can
also be connected in parallel to the level sensor VISY-Stick … Pin assignment:
Meaning
Abbreviation
Colour
Power
+
brown
Power supply -
-
blue
Communication A
A
white
Communication B
B
black
Table III.c: Pin assignment of environmental sensors with integrated cable
For integration of the environmental sensor in the potential equalization, a PA terminal at the sensor
housing is present.
