Dwyer DCT1000 User Manual

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.

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

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

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

Customer Service Phone Number . . . . . . . . . . . . . . .. . 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-

3