Dwyer DCT500ADC User Manual

Series DCT500ADC Timer Controller

1/16
[1.59]

1/2
[12.70]

1-3/16
[30.16]

6-1/4
[158.75]

6-3/4
[171.45]

4-1/4
[107.95]

4-7/8
[123.83]

TIME OFF

TIME ON

SEC

mSEC

F1

Specifications – Installation & Operating Instructions

BULLETIN E-98ADC

Introduction

The Series DCT500ADC Timer Controller is a timing system for pulse-jet type dust
collectors or pneumatic conveying systems in either continuous or on-demand clean­ing applications. It is provided with either 4, 6, or 10 channels. The DCT500ADC was
designed for ease of installation in your dust collector system. For installations requir­ing fewer channels than available on the board, a shorting plug is provided to allow
selection of the last used channel. Time-on and time-off settings are selected using
two potentiometers. High-limit and low-limit control inputs are provided for use with
on-demand systems. When used in a continuous mode the high-limit input is
jumpered.

Installation

Warning: Always replace the fuse with the proper type and rating.

The fuse is Type 3 AG fast acting 3 Amp @ 250V. DO NOT use slow­blow type fuses. Failure to comply with this requirement will void man­ufacturer’s warranty.

This equipment is intended to be powered using a recognized Class 2
power supply. If powered from a DC bus a suitable transient protection
device meeting Installation Category II requirements must be used.
Protection provided by the equipment may be impaired if the equipment
is used with accessories not provided or recommended by the manu­facturer, or is used in a manner not specified by the manufacturer.

Power Requirements

The DCT500ADC Series controller is designed for operation with a DC power supply.
The supply voltage must be between 10 VDC and 35 VDC. Exceeding 35 VDC may
damage the unit. The solenoid outputs are driven from the power supply so the sole­noids must be rated for operation at the power supply voltage. The solenoids are
connected as shown in the wiring diagram and must not be connected to any other
external circuit. The solenoid common is the positive (+) lead and is internally con­nected to the fused positive (+) supply. The individual outputs are switched to the
negative (-) supply input through an open drain field effect transistor (FET). The out­puts are protected for inductive flyback transients of the solenoids.

Location

The system must be located in an enclosure that meets relevant safety standards and
electrical codes. There are no other special orientation requirements. Mount it using
the four mounting holes in the baseplate. The baseplate back is flush, so no special
spacers are needed to accommodate obstructions except for those imposed by the
location itself.

SPECIFICATIONS
Output Channels: 4, 6, & 10 channels.
Voltage Requirements: 10 to 35 VDC ( ).
Power Consumption: 0.6 W.
Input Power: 106 W @ 35 VDC ( ) max.
Load: 3A max per channel.
Fuse: Type 3 AG, 3A @ 250 VAC (~).
Ambient Operation Temperature: -40 to 149°F (-40 to 65°C).
Storage Temperature Limits: -40 to 176°F (-40 to 80°C).
Humidity Conditions: 5 to 95% noncondensing.
On Time: 50 to 500 msec.
On Time Accuracy: ±5% of setting.
On Time Repeatability: ±1 msec.
Off Time: 1 to 180 seconds.
Off Time Accuracy: 5% of setting.
Pollution Degree: 2.
Altitude: 6560 ft (2000 m) max.
Environment: Indoor use, must be installed in a weather-proof enclosure for out-

side applications.

Weight: 9 oz (255 g).
Agency Approvals: CE.

Connections

The power and solenoid connections are located at the lower edge of the board. 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 gages. These termi­nals should be torqued to 5 in. lb. The connectors are specified for single connection
but multiple wires may be connected to a single lug provided local codes allow this
and good workmanship practices are followed. When using stranded wire, make sure
that there are no “stray” strands. These may cause system failure or damage.
Connect the (+) (-) power to (+) and (-). Connect the solenoids between the selected
output and the solenoid common. Solenoid common and (+) are internally connect­ed through fuse. Refer to Figure 2-1.
The wire should be stripped to no more than 0.25 in. A strip gauge is provided at the
lower right corner of the board. Longer than this may cause shorts. Switches con­nected to the control inputs at the top of the board must be isolated normally open
contacts connected only to the relevant terminal and to the common terminals.

The following subparagraphs describe the external switch connections. Refer to fig­ure 2-1 for switch connection illustration.

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]

FIGURE 2-1 Switch Connections

0.31 TYP [7.87]
4 PLACES

7.73

[196.3]

8.88

[225.6]

4.00 TYP
[101.6]

5.74

[145.8]

4.45

[113.0]

4.00

[101.6]

SHORT FOR
CONTIUOUS
OPERATION

POWER
INPUT

SOLENOIDS

(+)

(-)

TB1

TIME OFF

TIME ON

External Limit Switch Connection

The controller may be used with an external pressure limit switch or sensor to pro­vide demand-cleaning operation. A three pin terminal block provides connection for
external high and low limit switches. 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

®

pres­sure gage. The switches must be isolated contacts between the high or low limit input
and the common connection. The wiring from the switches must be two or three wires
with no other connections made to these. 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 is summarized as follows:

Time Off and Time On Setup

Time off defines the period of time between solenoid activations when no channels
are enabled. This value may be set between 1 second and 180 seconds with a res­olution of 1 second. Time on defines the solenoid on time. The value may be set
between 50 msec and 500 msec with a resolution of 10 msec. If adjustments are
made while the system is in operation, the new setting will take effect in the follow­ing solenoid cycle. Do not use excessive force to turn the potentiometers. This will
damage the unit. A factory installed option is available for a time on range of 0.05 to
10 seconds.

Current

Operation

Hold

Hold or Run

Hold
Hold

Run

Hold

Run

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

Ø – Transition from open to closed
≠ – Transition closed to open
X – Either open or closed

Operating Modes
Continuous Cycle Mode

The DCT500ADC has two 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 placing a jumper between the high limit input and the
common connection. Two setup parameters control operation: time off, time on. 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.

Demand Mode

Demand mode operation can be configured using the high limit and low limit inputs.
A simple on-off system can be setup with a single pressure switch connected to the
high limit input. Better control can be achieved with a high and low limit switch set
such as is provided in the Dwyer Photohelic
mode, time on and time off may be programmed to define the cleaning cycle. When
the cycle is completed, the controller will continue the cycle until the last channel is
pulsed. The next cleaning cycle will always start on channel 1. A factory installed

®

pressure gage. In this on-demand

option is available that will not clean to the end of a cycle, but rather stop where the
cleaning cycle ended. The next demand for cleaning will start where the last clean­ing cycle left off.

System Setup
Last Channel Selection

A jumper connector is provided to select the last channel used. Place the jumper on
the two pins corresponding to the last channel used in the installation.

Weatherproof Enclosure Option

Explanation of Symbols:

DescriptionSymbol

Caution: Risk of electric shock

Caution: Risk of danger, refer to user’s manual for further
information

Direct current

Alternating current

~

Agency Approvals and Test Standards:

CE: IEC 61000-4-2: 2001

IEC 61000-4-3: 2006
IEC 61000-4-4: 2004
IEC 61000-4-5: 2005
IEC 61000-4-6: 2006
CENELEC EN 55022: 2007
FCC Part 15 CFR Title 47: 2007
ICES-003: 2004 Digital Apparatus (Industry Canada)
ANSI 63.4-2003
CENELEC EN 61326-1: 2006
2004/108/EC EMC Directive

©Copyright 2009 Dwyer Instruments, Inc Printed in U.S.A. 7/09 FR# 05-443180-10 Rev.1

DWYER INSTRUMENTS, INC.

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

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

Lit-By Fax: [phone]