Mains Connection; Signal Input Or Sensor Connection (E1, E2); Control Outputs 0 - 10 V (A1, A2); Voltage Supply For External Devices (+24V, Gnd) - Helios EUR EC Montage- Und Betriebsvorschrift

Installation and Operating Specification EUR EC
5.3

Mains connection

Power from the mains is connected to terminals: PE, L1 and N. Here, it must be strictly observed that
the mains voltage lies within the allowable tolerance specifications (
affixed to the side).
Danger due to electric current
The mains voltage must comply with the DIN EN 50160 quality characteristics and the defined
standard voltages in IEC 60038!
5.4

Signal input or sensor connection (E1, E2)

The unit has two analog inputs: Analog In 1 = "E1" and Analog In 2 = "E2"
The connection is independent of the programmed operating mode and from the sensor signal
employed.
When connecting passive temperature sensors LTR, LTK, LTA.. (KTY81- ) or PT1000 at terminals
•
"E1" and "T" or "E2" und "T" 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 temperature sensors type LTR, LTK, LTA.. (KTY81- ) a capacitor is integrated.
When connecting aktive sensors at the terminals "E1" and "GND" and or "E2" and "GND" attention
•
must be paid to correct polarity, a 24 V DC power supply is integrated.
For sensors in two-wire-technology (4 - 20 mA signal), the connection is made on the "E1" and
•
"24 V" or "E2" and "24 V", "GND" terminal is omitted.
Danger due to electric current
Never apply line voltage to analog inputs!
5.5

Control outputs 0 - 10 V (A1, A2)

The analogue outputs can be used to activate a speed controller with 0 - 10 V input for example. Fans
with integrated controller and 0 - 10 V input can be activated directly.
Analog output 1 (terminals A1 - GND)
•
– Controlled 0 - 10 V output for control circuit 1 (factory setting function
• Analog output 2 (terminals A2 - GND)
– For operation with one control circuit: constant voltage +10 V e.g. for supply of an external
potentiometer (function factory setting
– For operation with a second control circuit: controlled 0 - 10 V output for control circuit 2 (function
initial setting
Other functions can be assigned if necessary (
Danger due to electric current
It is not permissible to connect outputs of several devices to each other!
5.6

Voltage supply for external devices (+24V, GND)

A voltage supply is integrated for external devices e.g. a sensor (max. current load see technical
data).
In case of overload or short circuit (24 V – GND), the external power supply is shut down (multi-fuse).
The device performs a "Reset" and continues operation.
• It is not permissible to connect voltage outputs of several devices to each other!
It is not permissible to connect voltage outputs in the device to each other!
•
5.7

Digital inputs (D1, D2)

Different functions can be assigned to the digital inputs "D1"and "D2" (see IO Setup: Functional
overview of digital inputs). Activation via floating contacts, a low voltage of approx. 24 V DC is
connected.
Danger due to electric current
Never apply line voltage to the digital input!
Note the input resistance (see technical data).
L-BAL-E274-GB 1815 Index 002
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Operating Instructions / IO Setup).
Electrical installation
Technical data and nameplate
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