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6
Installation
6 Installation
6.1
Electrical connection
DANGER!
The relevant regulations must be observed during electrical connection:
- Regulation for electrical plants in potentially explosive rooms (Elex V)
- Regulation for the installation of electrical plants in potentially explosive areas
- EC-type examination certificate
The electrical connection must only be carried out by qualified personnel!
The voltage supply must be intrinsically safe and must not exceed the following maximum values:
U
: DC 28 V
i
I
: 100 mA
i
P
: 750 mW
i
Effective inner inductivity L: negligibly small
Effective inner capacity C: ≤ 10.4 nF
In intrinsically safe electrical circuits, only intrinsically safe, certified measuring devices may be used!
For electrical connection 11 (attached cable) the following values results in dependence of the cable
length L:
U
≤ 28 V
i
I
≤ 100 mA
i
P
≤ 750 mW
i
C
≤ 10.4 nF + 100
i
L
≤ 1
i
General information
•
Maximum cable length 50 m
•
Minimum bending radius 120 mm (for permanent laying)
•
Protect the cable end against humidity
•
Observe the length-dependent inductivities and capacities if lengthening the cable
•
Lay the signal lines isolated from cables with a voltage of > 60 V
•
Use protected cables with twisted cores
•
Keep away from large, electrical plants
NOTE!
The intrinsically safe electrical circuit must be restricted to overvoltage category I as stipulated in
IEC 60664-1. The electrical circuit supply is only to be provided by a certified, intrinsically safe power
source with a protection level of "ib".
NOTE!
For the special conditions for use, the examination certificate must be observed,
chapter 8 "Certificates", Page 23.
20
pF
× L
m
µH
× L
m
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