VEGA WEIGHTRAC 31 Foundation Fieldbus - Manual (Page 27)

27
5 Connecting to power supply
WEIGHTRAC 31 • Foundation Fieldbus
42375-EN-131120
instructions are part of the scope of delivery and come with the Ex-
approved instruments.
8
9
2
1
7
5
3
4
6
1 1
24
/L
/N
PE
56
22
11 12
21
22
19
20
18
17
14
13
16
15
12
Fig. 14: Electronics and terminal compartment (Ex-d) with instruments with
intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal input 4 … 20 mA (active sensor)
4 Switching input for NPN transistor
5 Switching input floating
6 Transistor output
7 Interface for sensor-sensor communication (MGC)
8 Simulation switch (1 = simulation on)
9 Setting the bus address for sensor-sensor communication (MGC) 2)
5 6 7 8
2
3
4
1 2 +
( ) (-)
1
Fig. 15: Adjustment and connection compartment (Ex-ia) with instruments with
intrinsically safe current output
1 Terminals for intrinsically safe signal output FF bus
2 Contact pins for the display and adjustment module or interface adapter
3 Terminals for the external display and adjustment unit
4 Ground terminal
Electronics and terminal
compartment - Instru-
ments with intrinsically
safe current output
Adjustment and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
2) MGC = Multi Gauge Communication