Vega FIBERTRAC 31, Быстрая настройка

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18
4 Connecting to power supply
FIBERTRAC 31 • Four-wire 4 … 20 mA/HART
62067-EN-211203
Inductive loads also result from the connection to a PLC input or
output and/or in combination with long cables. It is imperative that you
take measures to extinguish sparks to protect the relay contact (e.g. Z
diode) or the transistor or 8/16 mA output.
Instruments with intrinsically safe current output
You can find detailed information on the explosion-protected versions
(Ex-ia, Ex-d) in the Ex-specific safety instructions. These safety
instructions are part of the scope of delivery and come with the Ex-
approved instruments.
1
1
24
/L
/N
PE
56
22
11 12
21
22
19
20
18
17
14
13
16
15
12
2
5
1
3
4
6
7
8
Fig. 14: Electronics and connection compartment (Ex-d) with instruments with
intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal input 4 … 20 mA
4 Switching input for NPN transistor
5 Switching input floating
6 Transistor output
7 Interface for sensor-sensor communication (MGC)
8 Setting the bus address for sensor-sensor communication (MGC)
4)
Electronics and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
4)
MGC = Multi Gauge Communication