Disconnection Between Controller And Motor (Repair Switch); Motor Protection; Signal Input Or Sensor Connection (E1, E2) - Helios FU Comfort Sinus Manuel De Montage Et D'utilisation

Installation and Operating Specification FU Comfort Sinus
5.6.2

Disconnection between controller and motor (repair switch)

Ideally, a repair switch should be installed before the controller (supply line disconnect).
In the case of complete disconnection (entire load) after the controller, the enable (controller OFF /
ON) must be disconnected simultaneously. I.e., an additional control contact is needed. Switching on
the motor while simultaneously issuing the enable (ON) achieves secure energizing with low satura-
tion of the controller. For this a programming is necessary (
Attention!
When switching on the motor plus existing release: under certain circumstances, this can occur under
full modulation of the controller.
5.7

Motor protection

Motor protection is possible by connecting thermostats "TB" or thermistors (PTC thermistor) "TP".
•
When several motors are connected ensure that the thermal contacts "TB" or PTC resistors "TP"
are always connected in series. A maximum of six individual thermistors (DIN 44081 or
DIN 4408144082) may be connected in series to a single device. Depending on the motor type, at
least two or three individual sensors are built in.
•
Monitoring of motors in Ex zones is not permissible. For systems of this type, an additional posistor
tripping unit is required, with disconnection via a separate motor protection circuit.
The unit switches off when a connected thermostat or thermistor has tripped the circuit (interruption
between both terminals "TB/TP". The unit then remains switched off. A programmed fault-indicating
relay is triggering.
Possibilities for re-starting after the drive has cooled down terminals "TB/TP" bridged by:
•
By switching the mains voltage off and then on again.
•
Function "Reset" Menu group "Start"
•
By digital input for remote (enable ON/OFF) or by Reset-input (see IO Setup - Digital Inputs).
Attention!
•
An outside voltage may never be connected to the terminals "TB/TP" and/or!
•
If a bypass circuit is installed, or in the "100 %" position on devices with a main switch, the motor
protection inside the controller has no function. In this case, additional motor monitoring may be
required.
5.8

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
"E1000" 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!
L-BAL-E304-GB 2004
Display during motor fault
(Example for menu language English)
Part.-No.
17/139
Electrical installation
IO Setup Enable ON / OFF).