1. Home
  2. E. Electrical installation
  3. D1. Connection of the flow meter

D1. Connection of the flow meter

Reading Time: < 1 minute - Video Time: 0

1. Introduction

In this chapter we will cover:

  • Requirements for the cables
  • Requirements of the power supply


Never use the AC power! This will void the warranty and bring permanent damage to the electronics. The instrument might be damaged beyond repair.Icon no AC power

2. Overview M12 5-pin connector

Almost all connections are available via the M12 5-pin connector, located on the back of the Transmitter.

Transmitter back M5-pin

For use of Ethernet: use M12 4-pin connector, see chapter D4 Ethernet wiring.

The M12 5-pin connector:

Icon M12 5-pin

1+12..24 VDC.
20 Volt
34..20 mA. signal, active

3. Cabling details

For all connections!
Use:  Shielded twisted pair cabling to avoid any interference from other outside electrical signals.Example twisted pair
Always: Connect the shield to safety ground at one point. When in doubt, ask an expert to help with proper grounding and shielding of your installation.Icon ground
Thickness of wires depends on the cable length:

  • Length < 300 m / 1000ft : 20 awg
  • Length > 300 m / 1000 ft: 18 awg or better

4. Power supply details

Input voltage: 12 to 24 VDC.

At the connector at least 12 Volt: be aware of voltage drops over long cables!

Schematic Voltage drop


The Transmitter display will notify you when there is insufficient power:

Schematic power insufficient

 5. Next step

Your communication protocol defines the type of wiring you will need.

Updated on October 31, 2019

Was this article helpful?