Dwyer DCT1000DC User Manual

Series DCT1000DC Dust Collector Timer Controller

Specifications – Installation and Operating Instructions

Bulletin E-97DC

Thank you for purchasing the Dwyer®DCT1000DC 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 Dwyer®DCT1000DC 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
DCT1000DC offers, or an external pressure switch can be used for
High/Low limit control.

The Dwyer® DCT1000DC 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 DCT1000DC and how they can be applied to
get the most out of your dust control requirements.

SPECIFICATIONS
DCT1000DC Timer Controller:
Output Channels: 6, 10, & 22 channels.
Power Requirements: 10 - 30 VDC.
Solenoid Supply: 3A maximum per channel.
Fuse: 3A @ 250 VAC.
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).

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361 U.S.A.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]

SETUP

UP

DOWN

SELECT

STATUS

RUN

ALARM

MANUAL

OVERRIDE

RESET

PROCESS (IN H2O)
LAST OUTPUT
TIME OFF (SEC)
TIME ON (M SEC)
HIGH LIMIT
LOW LIMIT
HIGH ALARM
LOW ALARM

(MIN)

CYCLE DELAY
DOWN TIME CYCLES

(MIN)

AUTO ALARM RESET

(SEC)

6-1/4

[158.75]

6-7/8

[174.62]

2-3/4

[69.85]

8-1/4

[209.55]

8-3/4

[222.25]

Figure 1 – Dimensional Specifications for the DCT1000DC

(shown with optional module DCP100A)

The Dwyer®DCP100A or DCP200A pressure modules are designed
exclusively for use with the DCT1000DC 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 on-board 24 volt power supply to power the loop.

1/16

[1.59]

1-13/16
[46.04]

1-11/16
[42.86]

1/2

[12.70]

1

[25.40]

2-7/16

[61.91]

SPECIFICATIONS
Pressure Ranges: 10 in w.c. or 20 in 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).

Table of Contents Page No.

Figure 1 Dimensional Specifications . . . . . . . . . . . . . . . . . . . .2

1.0 Installing the DCT1000DC . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1 Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.2 DCT1000DC 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 Pressure Model Locking Pins . . . . . . . . . . . . . . . . . . . . . . . . .5

1.3.3 Connecting DCP to Master Controller . . . . . . . . . . . . . . . . . . .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 DCT1000DC 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 Diagnostic s . . . . . . . . . . . . . . . .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 DCT1000DC

The open frame design of the DCT1000DC 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.

1.2 DCT1000DC 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 wire sizes from 14 to 22 AWG. The wire should be
stripped to no more than 0.25 inches to avoid shorts. To assist you in
determining the proper strip length, a strip gauge is provided at the lower
right corner of the board. The connector system used on the DCT1000DC
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 (+) and (-) (see Dimensional Specifications, Figure

1). Connect the solenoids between the selected output and the solenoid
common. Solenoid common and (+) 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.
In this on-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
Operation

Hold
Hold or Run
Hold
Hold
Run
Hold
Run

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.

Low
Limit Switch

Open
X
Ø
Closed
Closed
Closed
≠

High
Limit Switch

Open
Closed
Open
Ø
≠
Ø
Open

Next
Operation

Hold
Run
Hold
Run
Run
Run
Hold

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 DCT1000DC requires 10 to 30 VDC supply power. The solenoids
must be matched to supply voltage. DO NOT exceed 35V, because
transient suppression circuitry will begin to draw high current.