ZIEHL-ABEGG Acontrol PXET6Q, Operating Instructions Manual

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5.4.1 Running noise
When controlling ventilators using electronic voltage regulators, motor noise can occur (due to the
system), which can be troublesome (Phase cutting = series
“ P... ” ).
On fast running ventilators with a high level of air noise, this noise is relatively low. On slow running
ventilators with a low level of air noise, this noise may be dominant in the lower speed range due to
the occurrence of resonance.
For systems where noise is critical, we recommend using our
Fcontrol series frequency converters
with integrated sinusoidal
fi
lter.
5.5 Motor protection
The motor can be protected by connecting thermostats “ TB ” .
When multiple motors are connected, it is essential to ensure that thermostats “ TB ” are always
connected in series.
If a connected thermostat is tripped (break between the two terminals
“ TB ” ), the device is switched off
and is not switched back on.
Relais
“ K1 ” is de-energized, terminals “ 11 ” - “ 12 ” bridged. The signal lamp fl ashes in code
|
1
|
(see
Diagnostics / faults).
Possibilities for re-starting after the drive has cooled down (terminals “ TB ” bridged) by:
•
By switching the mains voltage off and then on again.
•
Via a digital input for remote control (ON / OFF enable).
Attention!
•
An outside voltage may never be connected to the terminals “ TB ” !
•
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.
5.6 Signal or sensor connection (E1 = Analog In 1)
The unit has one-analog input: terminals “ E1 ” / “ GND ” (Analog In 1).
The connection is independent of the programmed operating mode and from the sensor signal
employed.
The internal jumpers must be placed in correct position depending on input signal. Factory setting 0 -
10 V.
•
When connecting passive temperature sensors TF.. (KTY81-210) must be paid attention to no
polarity.
•
When connecting active sensors 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 “ +24 V ”
and “ E1 ” ( “ GND ” terminal is omitted).
Over DIP 4 an inverting of the input is possible for mode 1.01 speed controller.
•
DIP 4 =
|
OFF
|
(factory setting) for signals: 0 - 10 V, 2 - 10 V, 0 - 20 mA, 4 - 20 mA
•
DIP 4 =
|
ON
|
for signals: 10 - 0 V, 10 - 2 V, 20 - 0 mA, 20 - 4 mA
Attention!
Never apply line voltage to analog inputs!
Operating Instructions Acontrol – model series PXET6Q / PXET10Q Electrical installation
L-BAL-E016-GB 1925 Index 007 Part.-No.
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