Installation
Installation
Beck GmbH
Druckkontrolltechnik
Ferdinand-Steinbeis-Straße 4
71144 Steinenbronn
Operating instructions – Pressure Switch - Model-930...EX Rev.9
Page 7 of 18
The following standards and directives are useful:
EN 1127-1: Explosion protection – basic concepts and methodology
Standards for areas with risk of gas or dust explosion (“G”, “D”):
EN 60079-10: Classification of potentially explosive areas
EN 60079-14: Electrical installations in potentially explosive areas
EN 60079-17: Inspection and maintenance
EN 60079-25: Intrinsically safe systems
4.1 Installation
Choose the installation location from the following aspects;
Ease of access for installation, connection and operation
Protection from direct effects of the weather, such as rain and sun
The IP protection class of the equipment must suit the ambient conditions
In order to prevent dangerous temperature increases on the surface of the equipment, dust
deposits must be avoided (installation location, protective cover, cleaning measures etc.)
Switching pressure specifications apply to vertical installation which is also the recommended
position with pressure-pipe connections pointing downwards. If the switches are installed
horizontally with AMP connection terminals uppermost, the switching values are approx.
20 Pa higher.
4.2 Connection
4.2.1 Pressure connections
2 plastic pipe connection pieces (6 mm)
P1 +: for connection to higher pressure
P2 -: for connection to lower pressure
4.2.2 Electrical connections
When work is being performed such as installation, making electrical
connection, making repairs or opening the housing, it must be ensured that
No electrical voltage is present
Unintentional activation is not possible
Proceed as follows in potentially explosive areas:
Check whether the equipment category corresponds with the
specified zones
No potentially explosive atmosphere is present
A release for work must have been issued by the operator
Adherence to the applicable regulations and documentation for the equipment
Special notes for intrinsically safe (“i”) systems:
Each intrinsically safe operating material must have an associated operating mate-
rial inserted before it, outside of the potentially explosive zone.
Separate cable routing for intrinsically safe and non-intrinsically safe power circuits.
For operating voltages of less than 42V AC or 60V AC: Intrinsically safe and non-
intrinsically safe power circuits can be routed together in this case. This only applies
to safety barrier with galvanic separation.
Separation of intrinsically safe/non-intrinsically safe connecting parts: at least 50mm
(tight string length)
Distance between different intrinsically safe power circuits: at least 6mm
Distances between non-insulated conductive parts leading to connecting parts:
air gap of at least 3mm (housing-terminals-conductor tracks, earth etc.)
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