SPRIANO SPRIANO Series, Руководство по эксплуатации

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OPERATING MANUAL
MN-SST50
ED-17-09
SPRIANO® TECHNOLOGIES
- www.spriano.it – spriano@terranova-instruments.com
a TERRANOVA® Srl brand
- www.terranova-instruments.com - VAT IT07848810151
Factory & Sales: Via Gramsci 1 – 26827 Terranova dei Passerini (LO) – Italy
Head Office: Via Rosso Medardo 16 – 20159 Milano – Italy Ph: +39 0377 919119 – Fax: +39 0377 855720
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g.
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8
3.10
E
ARTHING
W
ARNING
!
The earth connection is required to prevent damage to people and malfunction of
the instrument.
-
Case 1: Installing the instrument in a plant devoid of earthing systems
In the case where the plant devoid of earthing, it is necessary to connect the earth wire to the
terminal block through the cable that carries the signal and the power supply (
Figure 8 ).
-
Case 2: Installing the instrument in a plant provided with earthing systems
Make sure the earthing (GND) of the system has the least resistance possible.
You can add an additional earth wire with section not less than 4 mm2 to ensure such
connection.
Figure 13: 4 ÷ 20 mA loop connection with Ex ia barrier
W
ARNING
!
In the case represented in Figure 14 , within the earth wire may also scroll through
the current protection of other instruments where the earthing of the system
(GND) had not been carried out in an optimal manner.