Spirax Sarco VLM30 User Manual

IM-P736-02 EMM Issue 3
41
VLM30 In-Line Vortex Flowmeter
3.18.6 Analog input 4 to 20 mA
Only for devices with HART
®
communication
1 Terminal points in a separate cable junction box
2 VLM30 Communications Board
3 VLM30 Power supply
4 Remote temperature/pressure transmitter
5 Power supply for the remote transmitter
Fig. 25 Connection of transmitters to analog input (example)
Analog input 4 to 20 ma
Terminals ANALOG INPUT+/ANALOG INPUT−
Operating voltage 16 to 30 Vdc
Input current 3.8 to 20.5 mA
Equivilent resistance 90 Ω
A remote transmitter with current output from 4 to 20 mA can be connected to the analog input:
-
Temperature transmitter
-
Pressure transmitter
The analog input can be configured using the relevant software:
-
Input for the pressure measurement for pressure compensation for the flow measurement of gases and
steam.
-
Input for the return temperature measurement for energy measurement.
1
2
3
5
4

Spirax Sarco VLM30 Specifications

General

Brand	Spirax Sarco
Model	VLM30
Category	Measuring Instruments
Language	English