VEGA MINITRAC 31 4 … 20 mA_HART - four-wire User Manual

Page 24

5 Connecting to power supply

MINITRAC 31 • 4 … 20 mA/HART - four-wire

40447-EN-131119

5 6 7 8

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

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.

18
17

14
13

16
15

Fig. 12: 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 (active sensor)

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)

Adjustment and con-

nection compartment

- Non-Ex instruments and

instruments with non-

intrinsically safe current

output

Electronics and connec-

tion compartment - In-

struments with intrinsi-

cally safe current output

MGC = Multi Gauge Communication