Datcon DT1315 Series, Руководство по эксплуатации

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DT1315 xx xx
20100826-V0
11
5. Connecting
5.1. Preparing the connection
Select and prepare
connection cable
Always observe the following safety instructions:
• When you are going to install instruments in hazardous
area or install instruments which are connecting to
instruments are working in hazardous area you
should take
note of the appropriate regulations, conformity and type
approval certificates of the DT1315 xx xx and other
instrument. The connection must be carried out by trained
and authorized personnel only!
• Connect only in the complete absence of supply voltage
• Use only a screwdriver with appropriate head
Take note the suitability of the connecting cable
(wire cross-section, insulation, etc.).
The wire cross-section should be 0.25-1.5 mm
2 .
You may use either solid conductor or flexible conductor.
In case of using flexible conductor use crimped wire end.
Take note of the corresponding installation regulations for
Ex applications. In particular, make sure that no potential
equalization currents flow over the cable screen. Ground
only one side the cable screen (it’s recommended the
transmitter side). If necessary of grounding on both sides
(for suppress the influence of high frequency interference
signals) this can be achieved by use of a capacitor (e.g.
ceramic capacitor 1 nF, 1500 V) or separate potential
equalization. The low frequency potential equalization
currents are thus suppressed, but the protective effect
against high frequency interference signals remains.