E-m-hf5-v2_12 – ROTRONIC HF5 User Manual

Page 23

E-M-HF5-V2_12

Rotronic AG
Bassersdorf, Switzerland

Document code

Unit

HygroFlex HF5 Humidity Temperature
Transmitters: User Guide

Instruction Manual

Document Type

Page

23 of 36

Document title

6.4.5

HF557: digital output, PoE (power over Ethernet)

This model is powered from the Ethernet LAN and has no terminal blocks.

WARNING: Connecting a device to an active Ethernet network can disrupt communications on the network.
Before connecting the HF5, make sure that it is properly configured for your network.

6.4.6

HF56

: 85…240 VAC supply voltage

Electrical diagram for voltage outputs

The maximum permissible cable length can be determined under consideration of the voltage drop caused by
the current flowing to the devices connected to the unit. The voltage drop in the cable depends both on cable
resistance and on the equivalent resistance of the devices connected in parallel to the unit. The total
resistance connected to each unit output should be at least 1000 ohms. Cable resistance should not be more
than 1/1000 of the load resistance.

AC L

AC N

OUT2

OUT1

GND