Series DCT1000 Dust Collector Timer Controller
Specifications – Installation and Operating Instructions
Bulletin E-97
Thank you for purchasing the DCT1000 Dust Collector Timer
Controller. You have selected a state of the art dust collector timer
control that will provide years of dependable operation and service.
The DCT1000 Dust Collector Timer Controller was designed to be
used with pulse-jet type dust collectors for on-demand or continuous cleaning applications.
Continuous cleaning applications do not require external inputs and
can be used for time based “on-demand” cleaning through use of
the cycle delay feature.
For on-demand applications, the plug-in pressure modules
(DCP100A/200A) can be used to take full advantage of all the features the DCT1000 offers, or an external pressure switch (such as
the Dwyer Photohelic
As with traditional Dwyer products, the Dwyer DCT1000 was
designed so that it is easy to use, thus allowing for a quick and easy
start up for your dust control applications. The contents inside this
installation and operating manual will guide you through the features
of the DCT1000 and how they can be applied to get the most out
of your dust control requirements.
®
) can be used for High/Low limit control.
SPECIFICATIONS
DCT1000 Timer Controller:
Output Channels: 6, 10, & 22 channels. Expandable to 255
channels using DCT1122 & DCT1110 channel expander boards.
Power Requirements: 85 to 270 VAC, 50 or 60 Hz.
Solenoid Supply: 3A maximum per channel.
Fuse: 3A @ 250 VAC. Low voltage control circuitry is isolated from
the line voltage for system safety.
Temperature Limits: -40 to 140°F (-40 to 60°C).
Storage Temperature Limits: -40 to 176°F (-40 to 80°C).
On Time: 10 msec to 600 msec, 10 msec steps.
On Time Accuracy: ±10 msec.
Off Time: 1 second to 255 seconds, 1 second steps.
Off Time Accuracy: ±1% of the value or ±50 msec, whichever is
greater.
Weight: 1 lb 3.0 oz (538.6 g).
Agency Approvals: UL, cUL.
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6-1/4
[158.75]
2-3/4
[69.85]
6-7/8
[174.62]
8-1/4
[209.55]
8-3/4
[222.25]
Figure 1 – Dimensional Specifications for the DCT1000
(shown with optional module DCP100A)
The DCP100A or DCP200A pressure modules are designed exclusively for use with the Dwyer DCT1000 Dust Collector Timer
Controller boards for on-demand cleaning requirements. These
series of modules are available in 10˝ w.c. [2.49 kPa] or 20 ˝ w.c.
[4.98 kPa] ranges, which allow for differential process pressure
measurement as indicated on the display of the master controller.
An isolated 4-20 mA readout channel is provided for remote pressure display. The 4-20 mA output may be wired either for use with
an external power supply and indicator or using the isolated onboard 24 volt power supply to power the loop.
1/16
[1.59]
2-7/16
[61.91]
1-11/16
[42.86]
1/2
[12.70]
1-13/16
[46.04]
1-13/16
[46.04]
1
[25.40]
SPECIFICATIONS
Pressure Ranges: 10˝ w.c. or 20˝ w.c.
Temperature Limits: -40 to 140°F (-40 to 60°C).
Pressure Limit: 10 psi (68.95 kPa).
Pressure Limit (differential): 10 psi (68.95 kPa).
Accuracy: ±1.5% F.S. @ 73°F (22.8°C).
Output Signal: 4-20 mA.
Alarm Contacts: 1.5A inductive load, 3A resistive load @ 30 VAC
or 40 VDC.
Process Connections: Two barbed connections for use with 1/8˝
(3.18 mm) or 3/16˝ (4.76 mm) I.D. tubing.
Weight: 5.5 oz (155.9 g).
2
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Table of Contents Page No.
Figure 1 Dimensional Specifications . . . . . . . . . . . . . . . .2
1.0 Installing the DCT1000 . . . . . . . . . . . . . . . .3
1.1 Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 DCT1000 Terminal Connections . . . . . . . . . . . . . . . . . .3
1.2.1 External Pressure Connection . . . . . . . . . . . . . . . . . . . .3
1.2.2 Manual Override Switch Connection . . . . . . . . . . . . . . .4
1.2.3 Down Time Clean Connection . . . . . . . . . . . . . . . . . . . .4
1.2.4 Connecting Multiple Timer Boards . . . . . . . . . . . . . . . . .4
1.2.5 Continuous Cycle Mode . . . . . . . . . . . . . . . . . . . . . . . .4
Figure 2 Wiring Connections . . . . . . . . . . . . . . . . . . . . .4
1.3 DCP Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 3 DCP Installation . . . . . . . . . . . . . . . . . . . . . . . .5
1.3.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3.2 Connecting DCP to Master Controller . . . . . . . . . . . . . .5
1.3.3 Pressure Model Locking Pins . . . . . . . . . . . . . . . . . . . . .5
1.3.4 DCP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3.5 DCP Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.4 Alarm Mode Switch Connection . . . . . . . . . . . . . . . . . .5
1.4.1 Alarm Reset Switch Connection . . . . . . . . . . . . . . . . . .5
1.4.2 Connecting the 4-20 mA Loop . . . . . . . . . . . . . . . . . . .5
1.4.3 Connecting the Alarm Relay . . . . . . . . . . . . . . . . . . . . . .6
1.5 Three Position Selection Switch Wiring . . . . . . . . . . . . .6
2.0 Programming the DCT1000 Master
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.1 Last Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.2 Time Off Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.3 Time On Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.4 High Limit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.5 Low Limit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.6 High Alarm Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.7 Low Alarm Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.8 Cycle Delay Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.9 Down Time Cycles Setup . . . . . . . . . . . . . . . . . . . . . . .7
2.10 Auto Alarm Reset Setup . . . . . . . . . . . . . . . . . . . . . . . .7
3.0 Maintenance Support and Diagnostics . .7
3.1 Restoring Factory Defaults . . . . . . . . . . . . . . . . . . . . . . .7
3.2 Power Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.3 Active Channel Indicator . . . . . . . . . . . . . . . . . . . . . . . .7
3.4 Comm Check Indicator . . . . . . . . . . . . . . . . . . . . . . . . .7
3.5 Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.0 Glossary of Terms . . . . . . . . . . . . . . . . . . . .8
1.0 Installing the DCT1000
Warning: Always install and service this device with the
power off and a lockout installed if required. Line volt-
ages will be exposed at the power/output connector
and at the fuse. For this reason, we have installed a
plastic guard to protect the user from accidentally contacting line
voltages.
Please note that the power guard serves as a safety feature and
should not be removed under any circumstances.
For ease of installation and maintenance, the connectors and fuse
have been left unprotected. The open frame design of the DCT1000
will require an enclosure that meets appropriate safety and local
code requirements. For optimal performance, the enclosure should
also protect the controller from dirt, water and direct sunlight. There
are no special orientation requirements, and the controller mounts
easily using the mounting holes on the factory installed base plate.
Caution: Do not run control wires, communication cables,
or other class 2 wiring in the same conduit as power
leads. The system may malfunction if class 2 wiring is run
together with power conductors.
1.1 Power Requirements
The controller has a “universal” power supply that will allow operation on 120 VAC to 240 VAC power lines. The input voltage must be
between 85 VAC and 270VAC either 50 or 60 Hz. No circuit
changes are required when switching between these voltages. The
solenoid loads, however, must be sized to accommodate the line
voltage selected.
1.2 DCT1000 Terminal Connections
The line and solenoid connections are located at the lower edge of
the board below the plastic guard. The terminal block is a “Euro”
style connector system that clamps the wire within the connector
body . The connector will accept wir e sizes fr om 14 to 22 AWG. The
wire should be stripped to no more than 0.25 inches to avoid shorts
or expose line voltages creating a potential safety hazard. To assist
you in determining the proper wire gauge required, a strip gauge is
provided at the lower right corner of the board. The connector system used on the DCT1000 is specified for single connection but you
can piggyback to a single lug provided that local codes allow for this
and good workmanship practices are followed. To power up the
master controller and the channel expander, connect line power to
L1 and L2 (see Dimensional Specifications, Figure 1). Connect the
solenoids between the selected output and the solenoid common.
Solenoid common and L2 are internally connected. Switches connected to the control inputs at the top of the board must be isolated contacts connected only to the relevant terminal and to the common terminals. The following subparagraphs describe the external
switch connections. Refer to figure 2 for switch connection illustration.
1.2.1 External Pressure Connection
The controller may be used with an external pressure limit switch or
sensor to provide demand-cleaning operation. The high limit and
low limit inputs may be used for this purpose. A simple on-off system can be established with a single pressure switch connected to
the high limit input. Better control can be achieved with a high and
low limit switch/gage such as the Dwyer Photohelic
demand mode, time on, time off, and cycle delay may be programmed to define the cleaning cycle. A three pin terminal block
(TB3) provides connection for external high and low limit switches
(see Figure 2 on the next page). These switches must be isolated
contacts. The common line must not be connected to equipment
ground or protective ground, since these may introduce electrical
noise and cause improper operation or possible damage to the control board. The operation of these inputs are summarized as follows
(see next page):
Current Low Limit High Limit Next
Operation Switch Switch Operation
Hold Open Open Hold
Hold or Run X Closed Run
Hold Ø Open Hold
Hold Closed Ø Run
Run Closed ≠ Run
Hold Closed Ø Run
Run ≠ Open Hold
Ø Transition from open to closed
≠ Transition closed to open
X Either open or closed
Note: If a DCP100A or DCP200A pressure module is installed in the
master controller, the switching functions are ignored.
®
. In this on-
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4-20 mA CONNECTIONS
RECEIVER
USING DCT1000
24V SUPPLY
RECEIVER
OPTIONAL
CONNECTION
SUPPLY
USING EXTERNAL
POWER SUPPLY
SUPPLY
ALARM
LOAD
4-20 MA
OUTPUT
4-20 MA
SOURCE
EXTERNAL
INTERNAL ALARM
CONTACTS
NORMALLY OPEN CONTRACTS
MAN
ALARM
LOW
HIGH
LIMIT
COM
LIMIT
TB4
TB5
D1
ALARM
OVR
MODE
CLN
RESET
COM
TB3
COM
TB2
OUT
DAISY
CHAIN
MASTER CONTROLLER
IN
INPUT MUST NOT BE
DAISY
CHAIN
CONNECTED
MASTER CONTROLLER
C3Ø4
(INTERNALLY CONNECTED)
F1
TB1
L1 L2
INPUT
12
SOL
COM
LINE
5
34
SOLENOIDS
(10 CHANNEL SHOWN)
6
789 10
Figure 2
Wiring Connections
1.2.2 Manual Override Switch Connection
The manual override function allows the system to be set to the run
mode regardless of other conditions. This mode is enabled when
the manual override terminal and common are connected. It is disabled when they are disconnected. If the controller is to be run in
continuous mode, a jumper wire may be wired across these terminals. When manual override is needed on a periodic basis, wire a
SPST toggle switch between the manual override terminal and the
common terminal.
1.2.3 Down Time Clean Connection
The down time clean operation forces the system into a run cycle
for a programmed length of time between 0 – 255 minutes. The
operation is initiated by connecting the down time clean terminal to
a common terminal. This function is best accomplished through use
of an external normally open switch.
1.2.4 Connecting Multiple Timer Boards
Both master controller boards and slave boards can have up to a
maximum of 22 channels each. The system may be expanded up
to 255 channels using master controller boards and slave boards.
The DCT1000 will automatically detect the total number of channels
involved and make their outputs available. You will note that both
the master controllers and slave boards have a telephone style connector mounted on the upper right hand side of the board. These
connectors are for use in systems requiring slave boards that must
be daisy chained together to provide additional channel capability.
For systems that require the slave boards, the master controller
must not have any connection made to its daisy chain input unless
it is designated as a slave control itself. (For larger systems requir-
OUT
DAISY
CHAIN
IN
DAISY
CHAIN
TO ADDITIONAL
EXPANDER MODULES
SLAVE CHANNEL EXPANDER
(INTERNALLY CONNECTED)
TB1
SOL
L1 L2
COM
LINE
INPUT
12
5
34
SOLENOIDS
(10 CHANNEL SHOWN)
6
789 10
ing more than three slave boards, a master controller must be used
as the fourth slave board to satisfy power requirements.) This
sequence would repeat itself until the limit of 255 channels has been
reached. The cables used are not ordinary telephone style cables.
Caution: Do not use telephone jumper cables. These
have a “twist” in the connection and may damage the
controllers. Cables designed for use with the DCT1000
are available from Dwyer Instruments (Model DCAC02-2
ft., DCAC04-4 ft., etc.).
1.2.5 Continuous Cycle Mode
The master controller has several operating modes available for different applications. Starting with the most basic mode, it is capable
of operating in a continuous cleaning cycle. This can be initiated by
either placing a jumper between the high limit input and the common, or the manual override input to the common connection.
Controlling this cycle are three setup parameters: time off, time on,
and cycle delay. Time on and time off specifically deal with the solenoid on time and the time interval between the end of the on pulse
and the start of the next. The cycle delay allows a delay of up to 255
minutes to be programmed between the end of one complete
cleaning cycle and the beginning of the next. This allows additional
options for defining a cleaning profile.
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1.3 DCP Installation
Caution: Prior to installing the DCP100A/200A please
review the operating specifications carefully.
Some operating systems, especially in pneumatic con-
veying applications, may see static pressure or vacuum
conditions that exceed the capability of the DCP100A/200A pressure module. For these conditions there are a number of alter
nate
Dwyer pressure products that can be used to meet your application requirements, all of which can be terminated to the Dwyer
DCT1000 Dust Collector Timer Controller. For more information on
these and other Dwyer products, please call us
1.3.1 Location
The system should be located in an enclosure that meets relevant
safety standards and electrical codes. There are no other special
orientation requirements as the pressure module is not orientation
sensitive. Care should be observed when routing the air hoses to
ensure that any potential condensation or moisture will not drain
into the sensor. Where heavy condensation is present, a drip loop
or an in-line filter should be installed to ensure long term operation.
PRESSURE
ALIGNMENT
PINS
MODULE
LOCKING PINS
INSERTED FROM
UNDERNEATH
MODULE ONLY
CIRCUIT
BOARD
INSERT LOCKING PINS UNTIL THEY SNAP FIRMLY IN PLACE
LOCKING PINS INSERTED
ALL THE WAY INTO THE
CHANNEL
Figure 3
DCP Installation
1.3.2 Connecting DCP to Master Controller
The pressure module is attached to the Master Controller using
integral connectors on both units. The insertion ports for the pressure module are located in the upper left quadrant of the DCT1000
Master Controller. The pressure module can be removed by compressing the retaining clips on each end of the module, then gently
pulling the module out of the master controller board.
When inserting the module, the following procedure should be
adhered to insure proper installation:
• Examine the bottom of the pressure module and note the orientation of the connectors.
• Align the module so that these connectors match the connector
receptacles on the controller board.
• Orient the module with the four alignment pins over their respective mounting holes.
• Gently press the module into the connectors and snap the retaining clips on either end of the module into their slots.
• Always install and service this device with the power off and a
lockout installed if required. “Hot” plugging the pressure module
into an operating system may damage the system or cause the calibration parameters to be erased.
When installing or removing the module make sure to orient the
module straight with board. Installing or removing the module at
any angle may break the alignment pins.
1.3.3 Pressure Model Locking Pins
The DCP100A and DCP200A are supplied with locking pins to
secure the module. In normal operation these are not required
since the latching tabs are sufficient to secure the module even in
a high vibration environment. However if the unit is to be shipped
or used where severe mechanical shock could be encountered the
locking pins ensure the module will not snap out of the board.
To install the locking pins, from underneath the module insert one
pin behind each of the two latching tabs. Press these all the way
into the channel. The ends of the tabs will extend through the slots
at the top of these channels. Next insert the module in the board
as described above, making sure it is properly aligned and snaps
firmly in place. Press the exposed locking tabs down until the tab
is seated behind the latch in the board. To remove the module,
slide the locking tabs up using a small screw driver then remove
the module as described above. See Figure 3.
1.3.4 DCP Connections
When a pressure module is installed, the 4-20 mA process signal
and the alarm relay contacts are available. The 4-20 mA circuit is
isolated from ground and other signals. The alarm relay contacts
are isolated, normally open contacts. Pressure connections may
be made to the stepped hose barbs with either 1/8˝ or 3/16˝ I.D.
tubing.
Caution: Do not force the module into the connectors.
Forcing the insertion may damage the connectors.
Properly aligned, the module should snap into place.
1.3.5 DCP Maintenance
The pressure module should require very little maintenance under
normal operational conditions. However, periodic calibration may
be desirable to assure accuracy of the readings. The module may
be removed and returned to the factory for calibration.
1.4 Alarm Mode Switch Connection
The auto alarm reset is controlled by the alarm mode switch connection. To enable the auto alarm reset the alarm mode input must
be connected to a common connection. A jumper may be used
when auto alarm reset is always active. A switch may be used if
there are times that the auto alarm reset must be disabled. The
switch must be an isolated contact and wired such that no connection is made between either of the wires and ground. See
Figure 2 Wiring Connections.
1.4.1 Alarm Reset Switch Connection
The alarm may be reset either by pressing the Alarm Reset button
on the control panel or by an external switch connected between
the alarm-reset terminal and one of the common terminals. The
alarm reset will only operate if the pressure module is installed and
the pressure has returned to a normal condition. See Figure 2
Wiring Connections.
1.4.2 Connecting the 4-20 mA Loop
The pressure module provides an isolated 4-20 mA output, which
may be used to remotely monitor the differential pressure across
the dust bags or cartridges. The connection is made on the master control module at the terminal block designated for this signal.
The connection is a 2-wire configuration with the option of using
either an external 15 to 35 VDC power source or using the internal
24 VDC source. See Figure 2 Wiring Connections.
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4-20 MA
OUTPUT
4-20 MA
SOURCE
EXTERNAL
INTERNAL ALARM
CONTACTS
ALARM
MAN
ALARM
HIGH
LOW
COM
LIMIT
LIMIT
TB4
TB5
DT
COM
TB3
MODE
OVR
RESET
CLN
COM
TB2
MASTER CONTROLLER
DAISY
DAISY
CHAIN
CHAIN
MODE SELECTION SWITCH
OUT
IN
REAR
SECTION
FRONT
SECTION
CONTINUOUS
OFF
ON DEMAND
LINE
(INTERNALLY CONNECTED)
TB1
L2
L1
L1
L2
INPUT
(10 CHANNEL SHOWN)
12
34
5
6
789 10
OUTPUTS (3A MAX)
SOL
COM
1.4.3 Connecting the Alarm Relay
With the pressure module installed, a relay contact is provided for
controlling an external alarm. This relay is a single form-A contact.
It is activated when either the high alarm threshold is exceeded, or
the pressure drops below the low alarm threshold. The connection
is made at the two-pin connector TB5. See Figure 2 Wiring
Connections
1.5 Three Position Selection Switch Wiring
An optional mode selection switch is available with the weatherproof enclosure. With this switch the user may select either continuous cleaning, on-demand cleaning, or off. This switch is supplied
factory wired as shown in Figure 4. The switch has a front and rear
section. The front section, consisting of two independant contacts,
controls the power to the board. These contacts must be wired in
parallel as shown in the diagram. The rear section controls the
manual override, which when closed will force the system into a
continuousmuct be reconneccted, follow the wiring diagram.
Caution: Do not interconnect the low voltage manual over-
ride leads with the power leads. This will destroy the con-
trol board as well as pose a serious shock hazard
2.0 Programming the DCT1000
Master Controller
We’ve made it easy to navigate the DCT1000. Menu items can be
accessed simply by pressing the “SELECT” button. The menu item
that you are currently accessing is indicated by the illumination of
an LED. To change menu items, all you have to do is push “UP” to
increase a value or push “DOWN” to decrease a value. There are
no keystrokes that you need to memorize, special combinations, or
passwords that are required.
The master controller is equipped with an on board display and
programming information center. The controller will power-up with
the process indicator illuminated. If a pressure module is installed,
the display will indicate the measured pressure in inches of water
(w.c.); otherwise it will normally be blank.
Figure 4
Three Position Selection Switch Wiring
2.1 • Last Output
The Last Output setup selects the last channel to be activated.
When first selected, the display will flash the last output available in
the system. With single board installations, this will be the number
of channels installed, typically 6, 10 or 22. This value becomes
more important when multiple modules ar
put value flashed will be the sum of all channels available in the system.
After the last available channel indication has completed, the currently programmed last channel value is displayed. This value may
be changed using the “UP” and “DOWN” buttons. The minimum
value is one while the maximum value is the maximum number of
installed channels, including all expansion modules.
The default value is the maximum number of channels. Pressing
“SELECT” will change the setup mode to Time Off Setup.
2.2 • Time Off (Sec.)
Time off defines the period of time between solenoid activations
when no channels are enabled. This may be set between one second and 255 seconds. The factory default is 10 seconds. The display will show the current time off setting when the time off setup
mode is entered. The value may be changed using the Up and
Down buttons. Pressing both “UP” and “DOWN” simultaneously
and holding for approximately four seconds will restore the default
value of 10.
2.3 • Time On (msec)
Time On Setup sets the solenoid on time. The display will indicate
the currently programmed time on setting. This is measured in milliseconds. Using the “UP” and “DOWN” buttons, the value may be
changed. The value may be set between 10 msec and 600 msec
in 10 msec increments. Pressing the “UP” and “DOWN” buttons
simultaneously for approximately four seconds will restore the factory default value of 100 msec. Pressing the “SELECT’ button will
advance the setup mode to the High Limit setup if the pressure
module is installed. With no pressure module, it will step to Cycle
Delay Setup.
e installed. The last out-
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2.4 • High Limit [Only available when DCP connected]
The High Limit Setup, available only with a pressure module
installed, sets the pressure at which the cleaning cycle will begin.
This value may be between zero and the pressure module full scale
pressure. Normally, the High Limit should be above the Low Limit.
If, however, the High Limit pressure is set below the Low Limit, the
cleaning cycle will begin when the High Limit is exceeded and stop
when the pressure falls below the High Limit. The Low Limit in this
case will have no effect. Pressing “SELECT” will change the system
to the Low Limit Setup mode.
2.5 • Low Limit [Only available when DCP installed]
The operation of the Low Limit, available only with a pressure module installed, is identical to the High Limit except this value sets the
pressure where the cleaning cycle will end. The upper settable value
is the calibration pressure of the pressure module and the lower limit
is zero. Pressing “SELECT” will change the system to the High
Alarm Setup mode.
2.6 • High Alarm [Only available when DCP installed]
The operation of the High Alarm Setup is identical to the High and
Low Limit Setup and is only available when a pressure module is
installed. The High Alarm default is 0. The upper settable value is the
full scale pressure of the pressure module and the lower limit is zer o.
Pressing “SELECT” will change the system to the Low Alarm Setup
mode.
2.7 • Low Alarm [Only available when DCP installed]
The operation of the Low Alarm Setup is identical to the High and
Low Limit Setup. The Low Alarm default is 0. The upper settable
value is the full scale pressure of the pressure module and the lower
limit is zero. Pressing “SELECT” will change the system to the Cycle
Delay Setup mode.
2.8 • Cycle Delay (min)
The cycle delay inserts a delay time between the end of the last
channel and the beginning of the first channel. This may be set to
between zero and 255 minutes. The factory default is zero. Setting
the value to zero will disable the delay. Pressing “SELECT” will
change the system to the Down Time Cycles Setup mode.
2.9 • Down Time Cycles (min)
The Down Time Cycles setup will select a value between zero and
255 minutes. The factory default is one minute. Selecting zero will
disable the operation. When the down time cycles is activated by
shorting the down time cycles input to the common terminal, (see
figure 2) the system will enter a forced cleaning mode for the programmed duration. NOTE: The cycle delay, if one is programmed,
will not be inserted in the timing cycle. Pressing “SELECT” will
change the system to the Auto Alarm Reset Setup mode, if a pressure module is installed, or to Process when no pressure module is
available.
2.10 • Auto Alarm Reset (sec) [Only available when DCP
installed]
The Auto Alarm Reset Setup, available only when a pressure module is installed, allows the auto alarm reset time to be selected. This
value may be set between zero and 255 seconds. The factory
default value is five seconds. When the auto alarm reset is enabled
by shorting the auto alarm reset terminal to a common terminal,
(See Figure 1) the alarm will be reset after the pressure r eturns to the
normal range and the timeout has expired. Pressing “SELECT” will
change the system to Process mode.
3.0 Maintenance Support and
Diagnostics
We have also included a number of features that will aid maintenance personnel in diagnosing problems or verifying that the system
is operating.
3.1 Restoring Factory Defaults
The DCT1000 has been programmed with factory default values
that meet most industry operating conditions. In the event that you
want to restore all of the parameters to the original factory default
values:
(1) Return the master controller to the process mode.
(2) Press and hold both “UP” and “DOWN” buttons.
The display will indicate a 10-second countdown, at the end of
which all parameters will be restored to factory defaults. Releasing
the switches prior to the end of the count will stop the process and
no modification will be made. Likewise, in each of the parameter
setup modes, pressing and holding the “UP” and “DOWN” buttons
simultaneously will reset the individual default value, leaving other
settings unchanged.
3.2 Power Indicator
A power on LED indicator is provided at the center left edge of the
board. This will be illuminated when the power supply is operating
properly. If the power LED is not illuminated, the primary power may
be off or there is a fault in the power circuit.
3.3 Active Channel Indicator
Located just above the solenoid terminations, you will find that each
channel is provided with an LED that is illuminated when the triac
switch is on. This allows a visual correlation between the channel
being pulsed and the operation of the solenoid.
3.4 Comm Check Indicator
The comm check indicator can be found in the upper right hand
corner of the slave and master controller board (just above the “out”
terminal, a telephone style connector). This indicator is used for two
purposes. First, on a master controller a brief flash once per second is produced to indicate that the system is operating. Second,
this indicator is used to show when the communication check operation is performed on slave boards. The master controller will check
each of the slave boards at a rate of about one inquiry per second,
starting with the slave board connected directly to the master controller and ending with the last slave board in the chain. The master controller will flash its Comm Check LED for about 250 msec
each time it makes a communication check. The external module
selected for test will also flash its Comm Check LED for about the
same time each time it is interrogated. Observing this test sequence
will indicate that the communication between boards is operational.
When a slave board powers up, the Comm Check LED will be illuminated continuously. It will be extinguished when the master controller has initialized its communication channel. This indicator then
shows that a master controller is operating and that each slave
board is responding properly on the daisy chain.
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7
3.5 Error Codes
Error codes will be displayed on the three-digit display when certain faults occur. Most of these indicators are associated with the
daisy chain communication, but certain error codes pertain to single board operation also. These codes are:
Bulletin E-97
4.0 Glossary of Terms
• Run Mode: The term used when the timer board is firing the sole-
noids.
Display Meaning Action Required
Make sure all electrical connections are appropriately
shielded so the master
controller is not disrupted
by noise.
The master controller will
try to recover from the fault.
If unsuccessful, replace the
pressure module.
Make sure the control cable
used in the daisy chain
interface is properly shielded from noise.
Reinstall all modules in
accordance with the
instructions in the factory
IOM.
Reinstall all modules.
Contact factory if the problem persists.
Err 1
Err 2
Err 3
Err 4
Err 5
This is a “watchdog” reset
that is enabled when the
master controller isn’t able
to cycle through its operation.
The pressure module has
failed to respond to the
request of the master
controller.
Communication error in
the daisy chain interface.
This will only appear
when the master controller is used in conjunction with a slave board.
The master controller has
detected a change in
module configuration or a
fault in one of the modules.
If the fault described in
“Err 4” is not corrected,
the master controller will
reconfigure the modules
that are responding properly and operate at a
degraded condition.
• Pressure Module: The pressure measurement subsystem that
includes the software and hardware for on-demand cleaning, alarms
and signal retransmission of the process variable (i.e., the differential
pressure across the dust bags).
• Master Controller: The primary timer board that contains all of the
major features, connections for external inputs and power to drive the
DCT1000 Dust Collector Timer Controller system.
• Power Guard: A plastic shield that covers the output triacs and
other line voltage circuitry.
• Demand Cycle Mode: A process in which the run mode is enabled
through the on-board pressure module or an external switch such as
the Dwyer Photohelic
• Euro Connector: A “caged” connection used to terminate solenoids, incoming power, or external switches on the DCT1000.
• Continuous Cycle Mode: A time based cycling mode dependent
on solenoid time on/off settings and time set between complete cycles.
• Manual Override: Allows the user to override the DCT1000 remotely or from the master controller panel through use of a switch or a wire
jumper.
• Slave Board: A channel expander that is used in conjunction with
the master controller to accommodate additional solenoids on larger
dust collection systems. It can be recognized easily as it does not have
the on-board display panel or the power supply present. A master controller may also be used as a slave board.
®
.
Err 6
Err 7
Err 8
Err 9
A message error affecting
the software of the master controller or one of its
modules.
Indicates that one of the
triac drivers are not functioning.
Internal Error.
Unassigned message
code.
Check the integrity of all
connecting cables used to
drive slave boards for additional solenoids. Also
check the electrical grounding of the system installation.
Return to factory for evaluation and repair.
Contact the factory.
Contact the factory.
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