SatchwellTM

Satchwell
DDP
TM
DIFFERENTIAL AIR PRESSURE SENSORS
Specification No:
See table on Page 2.
The DDP range of Differential Air Pressure Sensors are designed for
the control of air pressure in duct-work by the regulation of variable
volume fans and pressure regulating dampers in distribution systems
and also at terminal units. They may also be used for the monitoring of
air filter conditions.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
Duct or panel mounting
LCD display (panel mounting versions)
4-20mA, 0-5Vdc or 0-10Vdc Output (field selectable)
24Vac or 24Vdc input power
Choice of pressure ranges.
Suitable for use with clean, dry air or any inert gas.
Rapid response times.
Short circuit and reverse polarity protection.
Remote zero set function to ease commissioning
Linear output, low offset
IP 10
Data Sheets
DS 2.701 - MMC4701
DS 2.751 - MMC4601
DS 2.801 - IAC420
DS 2.951 - IAC600
DS 10.101,3 - MN350, 550DS 13.310, 1- UNC532 (BAS, Satchwee Σ)
DS 13.341, 3- I/P Boards (BAS, Satchwell Σ)
DS 13.320, 2- UNC496 (BAS, Satchwell Σ)
DS 13.321, 3- UNC596 (BAS, Satchwell Σ)
DS 2.120 - KMC
Multi-Lingual Instructions
MLI 21.606 - Mounting Details
Satchwell
SPECIFICATIONS
Types
DDP5601 Duct Mount, 0 to 249Pa
DDP5610 Duct Mount, 0 to 2490Pa each with four selectable full-scale ranges
DDP6601 Panel Mount, LCD display, 0 to 249Pa (see Pressure Ranges below)
DDP6610 Panel Mount, LCD display, 0 to 2490Pa
Media Compatibility
Dry air or inert gas
Input Power
24Vac/dc nominal
Output
Field selectable: 2-wire, loop-powered 4-20mA, or 3-wire 0-5V/0-10V
Pressure Ranges:
DDP5601, DDP6601: Unidirectional: 24.9/62.2/124.5/249Pa full scale, switch-selectable
Bidirectional:±24.9/±62.2/±124.5/±249Pa full scale, switch-selectable
DDP5610, DDP6610: Unidirectional: 249/622/1245/2490Pa full scale, switch-selectable
Bidirectional: ±249/±622/±1245/±2490Pa full scale, switch-selectable
Mode
Unidirectional or bidirectional, jumper-selectable
Display
Signed 3/½ digit LCD, indicates pressure in Pascals (Panel mount versions only)
Proof Pressure
3 psid
Burst Pressure
5 psid
Accuracy
±1% Full Scale, combined linearity and hysteresis
Temperature Effect
DDP5601, DDP6601: 0.05%/°C; DDP5610, DDP6610: 0.01%/°C (Relative to 25°C) 0 to 50°C
Zero Drift (1-year)
DDP5601, DDP6601: 2.0% max.; DDP5610, DDP6610 0.5% max.
Zero Adjust
Pushbutton auto-zero and digital input (2-pos terminal block)
Fittings
Brass barb; 3.175mm internal diameter
Enclosure:
IP 10
Wiring:
4-20mA mode, 2-wire (screened), polarity insensitive
0-5Vdc/0-10Vdc mode, 3-wire (screened), observe polarity.
Operating Environment:
0-60°C; 0 to 90%RH non-condensing
Case Material:
High Impact ABS Plastic, plenum rated UL94-5VA, White
Terminals:
Terminal blocks each accept 3 x 1mm2 wires; larger sizes not recommended.
Compatible Controllers:
URC, IAC420, 600, BAS, MN350, 550, Sigma
EUROPEAN COMMUNITY DIRECTIVES
This equipment meets all requirements of European Community
Directives for General Product Safety (92/59/EEC), and
Electromagnetic Compatibility (89/336/EEC).
INSTALLATION
INSTALLATION GUIDELINES
These sensors are suitable for indoor use only. When selecting a
mounting location, make certain the following conditions are met:
• Do not install where excessive moisture, corrosive fumes, vibration,
or explosive vapours are present.
• Do not install near large contactors, electrical machinery or welding
equipment.
• Allow 150mm clearance from contactors, switches, and associated
cabling.
• Locate where ambient temperatures do not exceed 60°C or fall
below 0°C and relative humidity does not exceed 90% or fall below
10%, non-condensing.
• The unit should be mounted vertically on a flat mounting surface
such as a panel back or ductwork.
LOCATION AND WIRING
It is recommended that the optional fitting kit DDP3601 (containing two
metres of PVC tubing and 2 duct mounting pitot tubes) be used to
ensure a reliable pressure connection. The pitot tubes fix to the duct
with the Ø3mm self-tapping screws. See MLI 21.606 for mounting
diagrams.
When connecting the tubing, push it on with a clockwise twisting action
to avoid loosening the barb fitting. Loop the tubing under the sensor to
ensure that moisture condenses outside the unit. The sensor
comprises two major parts:
• A pre-wirable base plate (containing integral electronics and the
pressure sensor) for wiring to the controller.
• A removable cover.
Cautions
Refer to data sheet relevant to the controller to which sensor is to
be connected.
Screened cable is recommended. The cable screen should be
earthed at the controller.
Maximum resistance, 15Ω per core.
1. Drill mounting holes (see drilling diagram on back page) and mount
sensor base plate using screws provided. Wire the sensor base
plate as follows:
2
a. Strip 6mm of insulation from wires.
b. Fit the plastic grommet provided (or the metal screw insert
provided if conduit is to be used) and feed the wires through to
the base plate terminals. Screw conduit (if used) into metal
insert.
c. Connect wires to screw terminals as shown in connection
diagram on Page 3.
2. Align the cover hinge with the slot on the right hand side of the base
plate (see illustration).
Pressure
terminations
Cover
hinge
Cable
entry
Wiring
terminals
LCD
Display
Pressure
Sensor
3. Configure the sensor as required (see Configuration)
4. Close the cover and secure with the two retaining screws.
5. Insert the plastic blanking plug into the cable entry hole on the right
hand side of the sensor.
• Jumper JP6 - enables selection of either 0-5Vdc or 0-10Vdc as
the output (when Volts is selected on the Volts/mA switch)
• Zero - sets the LCD display (where fitted) to zero (display zero
also facilitated by a remote switch connected to the Zero-Aux
terminals)
CONFIGURATION
1. Ensure that power is removed from the sensor.
JP3 JP6
BI
UNI
5V
10V
MAINTENANCE
RANGE
Volts mA
DDP5601
DDP6601
DDP5610
DDP6610
Cautions
This product contains no user serviceable parts.
Ensure that supply voltages are removed from the sensor before
removing the cover.
ACCESS TO CONFIGURATION CONTROLS/WIRING TERMINALS
ZERO
D
249Pa
249Pa
2490Pa
2490Pa
C
124.5Pa
124.5Pa
1245Pa
1245Pa
B
62.2Pa
62.2Pa
622Pa
622Pa
A
24.9Pa
24.9Pa
249Pa
249Pa
2. Set the configurable controls for the required application. The
options are (see illustration):
• Volts/mA - sets the output mode to either Volts (jumper
selectable, 0-5Vdc or 0-10Vdc) or mA (4-20mA).
• Range - The Range switch enables setting of the pressure range
as shown in the above diagram.
• Jumper JP3 - enables selection of either Unidirectional or
Bidirectional pressure
1. Remove power from the sensor.
2. Unscrew the two screws and remove the front cover. Recover the
plastic blanking plug.
3. Re-configure/re-wire as required.
4. Align the cover hinge with the slot on the right hand side of the base
plate.
5. Close the cover and secure with the two retaining screws.
6. Insert the plastic blanking plug into the hole on the right hand side
of the sensor.
7. Restore supply voltages to sensor.
CONNECTIONS
0-5Vdc/0-10Vdc
4-20mA
DDP Terminals
Remote
Zero
Controller
24Vac/24Vdc
DDP Terminals
Zero
Aux
Remote
Zero
Controller
Zero
Aux
Out
24Vac/24Vdc
0-5Vdc/0-10Vdc
3
DIMENSIONS
CL
55
111
9
72
55
30
72
111
CL
30
DDP5601, 5610 only
250
202
CL
30
Dimensions in mm
42
Cautions
• Do not apply power to the system until it has been checked by a
qualified technician and the commissioning procedures have been
completed.
• These sensors must only be used in conjunction with the appropriate
TAC Satchwell controllers shown on Page 2.
• This product contains no user serviceable parts.
• Ensure that supply voltages are removed from the sensor before
removing the cover.
• Screened cable is recommended. The cable screen should be earthed
at the controller. Maximum resistance, 15Ω per core.
• Observe wiring precautions given on the data sheet for the controller
that the sensor will be connected to.
• Do not exceed the maximum ambient temperature.
• Interference with parts under sealed covers invalidates guarantee.
• Design and performance of TAC Satchwell equipment is subject to
improvement and therefore liable to alteration without notice.
• Information is given for guidance only and TAC Satchwell does not
accept responsibility for the selection and installation of its products
unless information has been given to the Company in writing relating
to a specific application.
• A periodic system and tuning check of the control system is
recommended. Please contact your local sales office for details.
Copyright © 2005, TAC AB
All brand names, trademarks and registered trademarks are
the property of their respective owners. Information contained
within this document is subject to change without notice. All
rights reserved.
DS 21.606
12/05
TAC Headquarters
Malmö, Sweden
+46 40 38 68 50
Satchwell Helpline
+44 (0) 1753 611000
[email protected]
www.tac.com
Satchwell

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