VEGA WEIGHTRAC 31 4 … 20 mA_HART - four-wire - Manual (Page 27)

27
5 Connecting to power supply
WEIGHTRAC 31 • 4 … 20 mA/HART - four-wire
42374-EN-131119
5 6 7 8
2
1
Fig. 13: Adjustment and connection compartment with non-Ex instruments and
instruments with non-intrinsically safe current output
1 Terminals for the external display and adjustment unit
2 Contact pins for the display and adjustment module or interface adapter
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 terminal 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) 2)
Adjustment and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
Electronics and terminal
compartment - Instru-
ments with intrinsically
safe current output
2) MGC = Multi Gauge Communication