22
5 Connecting to power supply
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-130430
the terminal block with a small screwdriver. When loosening the lock-
ing, the terminal block is automatically squeezed out. It must snap in
place when re-inserted.
5.2 Connection - Density, mass flow rate
measurement
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. 10: Electronics and connection 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 (active sensor)
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)
5 6 7 8
2
1
Fig. 11: 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
Electronics and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
Adjustment and con-
nection compartment
- Non-Ex instruments and
instruments with non-
intrinsically safe current
output
1)
MGC = Multi Gauge Communication
