LTQ008 – LTQ230 Series 3-Phase
Products
User Instructions –
AIIOM000165
EN
Page
16
of
40
5.5
LTQ008 – LTQ230 BIC + LL (230/3 – 480/3 Proportional Control)
These advanced stand-alone actuators are designed to be installed in new constructions sites, or existing sites,
where there are no existing MCCs. These advanced three-phase actuators have several versions that
continue to add more features and options. These units accept analog control signals (4 – 20 mA or 2 – 10
VDC), and they process these incoming signals to position the actuator as a function of the incoming signal.
Additionally, these units generate an analog feedback signal proportional to the position of the actuator,
which is not directly related to the incoming signal. This feedback signal is designed to be used by automation
devices or displays external to the actuator.
Moreover, these units incorporate an LCS to facilitate the operation of the actuator locally. Having this feature
allows for the operation of the actuator without having an existing PLC or BAS-based analog controller, while
also providing operability with existing
external controls.
The inside of the actuator contains:
1.
A Reversing Motor Starter.
This actuator is
commanded to run CW (0°) or CCW
(90°) as a function of control signals
received from the LCS or remote control.
The required reversing motor starter is
already located inside the actuator.
2.
Phase Correction Circuitry.
If phasing is
incorrect at the actuator, limit switches
and torque switches are not necessarily
in the correct circuit to protect the gear
train or actuator from damage. Built-in
phase protection circuitry will
automatically reverse two of the three
legs to allow the motor to drive in the
correct direction. With this built-in
protection device, improper phasing is
non-existent. The installer needs neither
worry about improper phasing being
brought to the actuator nor possible
phase reversal in the future.
3.
Integral Local Control Device.
This series
is designed to operate in LOCAL mode
(control knobs located on the face of
the LCS which is an integral part of the
actuator) or in REMOTE mode, which
utilizes commands from a PLC, BAS, or
other volt-free contact (dry contact)
automation device. While in LOCAL
mode, the actuator responds to the
position of the controls located on the
face of the integral LCS. The mode
switch employs a padlockable lever that
locks the mode switch in any of its three
positions, preventing unauthorized changes in the operating mode (LOCAL, OFF, or REMOTE).
4.
Proportional Controller.
When the unit is in REMOTE mode, this analog processing PCB accepts 4 – 20 mA
or 2 – 10 VDC from the field and positions the actuator accordingly, utilizing the internal reversing motor
starter. A 4 – 20 mA or 2 – 10 VDC feedback signal is internally generated to provide remote reading of the
position of the actuator.
Figure 10: LTQ008 – LTQ230 BIC + LL (230/3 – 480/3 proportional
control) wiring diagram
