Electrical Installation; Emc-Compatible Installation Of Control Lines; Connection Voltage Supply; Sensor Connection - Helios ETR Montage- Und Betriebsvorschrift

Installation and Operating Specification ETR

5 Electrical installation

5.1 EMC-compatible installation of control lines

Pay attention to maintain sufficient distance from powerlines and motor wires to prevent
interferences.
When using a shielded cable the shield must be connected (as short and with as low an
induction as possible!) to the PE conductor on one side at the signal input (of the
evaluation unit).

5.2 Connection Voltage supply

Connection Voltage supply at terminals: "+U
observedt hat the mains voltage lies within the llowable olerance pecifications (see
Technical data and nameplate affixed to the side).
Danger due to electric current
Only PELV current sources which ensure safe electrical isolation of the operating voltage
in accordance with IEC/DIN EN 60204-1 must be used.
There is no potential isolation between supply voltage and output signal.

5.3 Sensor connection

Connection of temperature sensor for measuring actual value (not in scope of delivery)
to terminals "TF". It is possible to connect Helios sensors of series "LT.." (KTY81-210) or
PT1000 temperature sensors. It must be paid attention to no polarity.
For a high interference immunity a capacitor must be connected directly to the sensor (1
nF parallel). With Helios temperature sensors type LT.. (KTY81-210) a capacitor is
integrated.
Attention!
Never apply line voltage to analog inputs!
room-Thermistor
Type: LTR 40
Part.-No.: 1323
L-BAL-E293-GB 1841 Index 001
" and "GND". Here, it must be strictly
S
outside-thermistor
Type: LTA 40
Part.-No.: 1336
Part.-No.
7/19
Electrical installation
Air duct sensor
Type: LTK 40
Part.-No.: 1324