Dwyer DCP200 User Manual

Bulletin E-97-M

Series DCP100A/200A Pressure Modules

Specifications – Installation & Operating Instructions

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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 on-board 24 volt power
supply to power the loop.

Table of Contents Page No.

1.0 Installation . . . . . . . . . . . . . . . . .2

1.1 Location . . . . . . . . . . . . . . . . . . . .2

1.2 Connections . . . . . . . . . . . . . . . . .2

1.3 Pressure Module Installation . . .2-3

1.3.1 Alarm Mode Switch Connection . .3

1.3.2 Alarm Reset Switch Connection . .3

1.3.3 Connecting the 4-20 mA loop . . .3

1.3.4 Connecting the Alarm Relay . . . . .3

SPECIFICA T IONS
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).

Table of Contents Page No.

2.0 Demand Mode using a
DCP100A/200A Pressure

Module . . . . . . . . . . . . . . . . . . . .3

2.1 High Limit Setup . . . . . . . . . . . . . .4

2.2 Low Limit Setup . . . . . . . . . . . . . .4

2.3 High Alarm Setup . . . . . . . . . . . . .4

2.4 Low Alarm Setup . . . . . . . . . . . . .4

2.5 Auto Alarm Reset Setup . . . . . . . .4

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

4-20 mA CONNECTIONS

RECEIVER
USING DCT1000

24V SUPPLY

RECEIVER
OPTIONAL

CONNECTION

SUPPLY

USING EXTERNAL
POWER SUPPLY

SUPPLY

NORMALLY OPEN CONTRACTS

MAN

ALARM

D1

ALARM

LOW

HIGH

OVR

MODE

CLN

RESET

LIMIT

COM

COM

TB3

(INTERNALLY CONNECTED)

TB1

L1

L2

SOL
COM

COM

TB2

MASTER CONTROLLER

(10 CHANNEL SHOWN)

5

8

6

7

34

9

12

OUT

DAISY

CHAIN

MASTER CONTROLLER

IN

INPUT MUST NOT BE

DAISY

CHAIN

CONNECTED

OUT

CHAIN

IN

CHAIN

TO ADDITIONAL
EXPANDER MODULES

DAISY

DAISY

10

LIMIT

4-20 MA
OUTPUT

4-20 MA

SOURCE

EXTERNAL

INTERNAL ALARM

TB4

CONTACTS

TB5

ALARM

LOAD

C3Ø4

F1

LINE
INPUT

SOLENOIDS

Fig. 1 - Switch

Connections

3.0 Pressure Module Maintenance 4

1.0 Installation

Caution: Prior to installing the

DCP100A/200A please review the

operating specifications carefully.
Some operating systems, especially in
pneumatic conveying 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
alternate Dwyer Instruments, Inc. 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 at [phone], or
visit us on the web at www.dwyer-inst.com
or www.dust-controls.com.

1.1 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.

SLAVE CHANNEL EXPANDER

(INTERNALLY CONNECTED)

SOL

L2

COM

34

12

SOLENOIDS

5

(10 CHANNEL SHOWN)

6

7

8

10

9

TB1

L1

LINE

INPUT

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.

1.2 Connections

When a pressure module is installed, the 4­20 mA process signal and the alarm relay
contacts are available. The circuit may be
used with the internal 24-volt power source
or with an external source. In either case,
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. The following subpara­graphs describe the external switch con­nections. Refer to Figure 1 (above) for
switch connection illustration.

1.3 Pressure Module Installation

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

2

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.

Caution: Do not force the module
into the connectors. Forcing the

insertion may damage the con­nectors. Properly aligned, the module
should snap into place.

PRESSURE

ALIGNMENT
PINS

LOCKING PINS
INSERTED FROM
UNDERNEATH
MODULE ONLY

INSERT LOCKING PINS UNTIL THEY SNAP FIRMLY IN PLACE

MODULE

CIRCUIT
BOARD

LOCKING PINS INSERTED
ALL THE WAY INTO THE
CHANNEL

1.3.1 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.

1.3.2 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.

1.3.3 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.

1.3.4 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.

2.0 Demand Mode using a
DCP100A/200A Pressure

Module

The DCT1000 system may be configured to
be a self-contained on-demand control sys­tem with the installation of the DCP100A
/200A pressure module. When this module
is installed, the master controller detects it
and automatically sets the system to an on­demand mode, enabling features associat­ed with the pressure sensor. The following
subparagraphs describe the setup and
operation of these pressure related features.

3

2.1 High Limit Setup

The High Limit Setup sets the pressure at
which the cleaning cycle will begin. This
value may be between zero and the pres­sure module calibration 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 both Up and Down
buttons simultaneously and holding for
about four seconds will restore the factory
setting for High Limit to 5.0″ w.c. [1.24 kPa].

2.2 Low Limit Setup

The operation of the Low Limit mode is
identical to the High Limit mode except that
the default Low Limit pressure is 3.0″ w.c.
[0.75 kPa]. The upper setable value is the
calibration pressure of the pressure module
and the lower limit is zero. Press the Select
button until the Low Limit indicator is illumi­nated. Use the Up and Down controls to set
the limit to the desired setting. Pressing both
Up and Down buttons simultaneously and
holding for about four seconds will restore
the factory default.

2.3 High Alarm Setup

The operation of the High Alarm Setup is
identical to the High and Low Limit Setup.
The High Alarm default is 0.0″ w.c. The
upper setable value is the calibration pres­sure of the pressure module and the lower
limit is zero. Press the Select button until the
High Alarm indicator is illuminated. Use the
Up and Down controls to set the limit to the
desired setting. Pressing both Up and Down
buttons simultaneously and holding for
about four seconds will restore the factory
default.

2.4 Low Alarm Setup

The operation of the Low Alarm Setup is
identical to the High and Low Limit Setup.
The Low Alarm default is 0.0″ w.c. The
upper setable value is the calibration pres­sure of the pressure module and the lower
limit is zero. Press the Select button until the
Low Alarm indicator is illuminated. Use the
Up and Down controls to set the limit to the
desired setting. Pressing both Up and
Down buttons simultaneously and holding
for about four seconds will restore the facto­ry default.

2.5 Auto Alarm Reset Setup

The Auto Alarm Reset Setup mode 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, the alarm will
be reset after the pressure returns to the
normal range and the selected timeout peri­od has expired.

3.0 Pressure Module
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.

Still need help? Please feel free to contact one of our customer service representatives at 219­879-8000 or visit us on the web at www.dwyer -inst.com or www.dust-controls.com. Thank you
for choosing Dwyer Instruments.

©Copyright 2009 Dwyer Instruments, Inc Printed in U.S.A. 8/09 FR# 443123-01 Rev. 2

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