090.510-M (OCT 10) FRICK
QUANTUM™LX AcuAir
CONTROL PANEL
Page 18 MAINTENANCE
ANALOG BOARD
Overview
The Frick Quantum™ LX AcuAir
control panel is
capable of reading external analog devices, such as
temperature probes and pressure sensors. It uses
these input signals for the purpose of monitoring and
control. As an example, if an external temperature
sensor begins to read a higher than expected
temperature in some area, the controller would sense
this change, and provide the necessary output control
signal to remedy the situation, or provide a warning.
Unlike a digital signal, which is typically either an on
or off state, an analog signal can assume a wide
range of values, such as a temperature probe’s
reading a wide range of temperatures.
The method used for receiving (and sending) these
signals, is the analog board. The analog devices are
wired directly to the board, and the on-board
software/hardware converts the electrical signals
received from these devices into data, which is then
sent on to the Quantum™ 4 control board via
communications, and is monitored by the control
software.
General Description
This board features twenty-four input channels, and
eight output channels. The board channels are
configured through software, rather than using
physical jumpers. A more detailed description of the
operation of this board is provided in the sections that
follow. A drawing of this board is shown here:
Analog Board Description
The Analog Board is actually a small microprocessor
board and is programmed to control analog outputs,
or accept analog inputs, from external electrical
devices. Each enhanced board has the capability of
24 independent input channels. With the Quantum™
Compressor Control, these I/O channels are
dedicated through the software and external wring, as
to the function of each channel.
Communications LED's
The Quantum™ controller is in constant
communication with the Analog (and Digital) Board(s).
You will notice on each Analog and Digital board, that
there is a pair of LED's that are labeled as RX and
TX. These letters represent receive (RX) and
Transmit (TX). These LED's should be flashing at a
high rate during normal operation. This indicates that
the Quantum™ LX, and the board that you are
looking at, are properly communicating with each
other.
Refer to the
JUMPER AND DIPSWITCH
SETTINGS
section later in this section. This
section contains the dipswitch settings for
addressing the Analog I/O Boards. When
these switches are properly set, the
Quantum™ LX is able to serially
communicate with each I/O board and
provide control signals and data exchange. If
these switches are not properly set, the
result can be one of the following:
Lost or failed communications
(displayed in the
Communications
Status
box on the Home screen)
The wrong analog input signals being
received
The wrong analog output signals being
sent from the board.
Connections to the Quantum™
As stated earlier, the Quantum™ AcuAir
control
system utilizes up to two Digital, and one Analog
Board. In order to connect all of these boards together
so that the Quantum™ can control them, they must
be interconnected with a wiring harness that provides
all of the necessary D.C. voltage requirements, as
well as the communications capabilities. A diagram of
this wiring harness can be found later in this manual
(see the Power I/O Wiring Harness drawing). This
harness has a 6-pin connector at one end that plugs
into the Quantum™. Another connector plugs into the
power supply. The remaining three connectors (16
pin) will plug into each of the Digital and Analog
Boards in the system.
Upon close examination of this harness, you will
notice that each of the connectors for both the
Quantum™ and the I/O boards, have two rows of
connections. The wires that are inserted into the
