26
5 Connecting to power supply
WEIGHTRAC 31 • 4 … 20 mA/HART - four-wire
42374-EN-131119
Information:
The terminal blocks are pluggable and can be detached from the
electronics. To do this, loosen the two lateral locking levers of the
terminal block with a small screwdriver. When loosening the locking,
the terminal block is automatically squeezed out. It must snap in place
when re-inserted.
5.2 Connection - Mass flow detection
Non-Ex instruments and instruments with non-intrinsically safe
current output
1
1
24
/L
/N
PE
56
91
01
1
22
11
12
21
22
19
20
18
17
14
13
16
15
12
2
7
3
1
4
5
6
8
9
10
Fig. 12: Electronics and terminal compartment with non-Ex instruments and
instruments with non-intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal output 4 … 20 mA/HART active
4 Signal output 4 … 20 mA/HART passive
5 Signal input 4 … 20 mA
6 Switching input for NPN transistor
7 Switching input floating
8 Transistor output
9 Interface for sensor-sensor communication (MGC)
10 Setting the bus address for sensor-sensor communication (MGC)
1)
Electronics and terminal
compartment - Non-Ex
instruments and instru-
ments with non-intrinsi-
cally safe current output
1)
MGC = Multi Gauge Communication
