Oppermann Regelgeräte DDS-M984 Series User manual

Sensors PG1 | Data sheet No. 13251 | Version 09-2019 | 1| 6
Pressure dierential
transmitter DDS-M984…
DDS-MR984…Technical Data
Compressed medium: Air and non-aggressive media
Power supply:
• 3-wire-design 18 – 30 V AC/DC
• 2-wire-design 18 – 30 V DC
Output signal:
• 3-wire-design 0 – 10 V and 4 – 20 mA
• 2-wire-design 4 – 20 mA
Maximum current draw:
• Without display 160 mA
• With LED display 210 mA
Admissible ambient
conditions: -20 – 70 °C, 0 – 95 % RH
(non-condensing)
Long-term stability, type: ≤ ± 1% of sensor reading/year
Load (at 4 – 20 mA): 20 – 500 Ω
Linearity (incl. hysteresis
and reproducibility): ≤ ± 0.5% of full scale, min. ± 1 Pa
Uncertainty (total error
excluding long-term and
temperature inuence): ± 1% of full scale, min. ± 1 Pa
Switching output (npn): max. 30 V DC/100 mA 1)
Output signal toggle: Linear/square root extraction
Zero setting adjustment: Manual
Response time settings: Short, 200 ms
long, 1 s (default setting)
Process ports: 6 mm hose anges
Electrical connection: Screw terminals for wires
and cores up to 1.5 mm²
Mounting: Screw mounted with sheetmetal
screws
Display, optional: Red LED display, 3.5-digit 1)
Housing material: Switch housing with process port P2,
ABS, light-gray;
mounting bracket with process port
P1, POM, white
Housing dimensions: Approx. Ø 85 mm, H 58 mm
Weight: Approx. 135 g
Protection type
iaw. EN60529: IP 54 with protective cover
Cable grommet for
protective cover: M 16 x 1,5 Polyamide threads
Standards / conformity: EN 60770, EN 61326
2011/65/EU (RoHS)
Sensor method: Piezo-resistive pressure sensor for
airows
1) only on 3-wire design
• Metric cable glands
• Arbitrary installation orientation
Function
Pressure dierential transmitters of type series DDS 984 are
used to measure dierential, positive, and negative pressure in
gaseous, non-aggressive media. They have 2 sensor pressure
ranges and 2 output signals that can be selected alternatively
by swapping a jumper.
The pressure transducer converts the mechanical pressure
reading into an electrical sensor signal. The piezo-resistive
pressure transducer integrated into the DDS 984 pressure
dierential transmitter is congured so that the pressure to be
read is applied to a thin mono-silicon membrane. This deects
the membrane. The membrane is equipped with resistors based
on semi-conductor technology. These detect the mechanical
deection and generate an electrical output signal. The arran-
gement of the resistors at the same time results in temperature
response compensation. High-gain process ampliers convert
the signal from the pressure transducer into the output signal.
Within the specied error limits, the electrical output signal
changes proportionally to the applied pressure.
Possible applications include:
• Building automation, air-conditioning and cleanroom
technology
• Valve and damper control
• Filter, ventilator, and blower monitors
• Airow controls

Pressure dierential transmitter DDS-M984… DDS-MR984…
2| 6| Sensors PG1 | Data sheet No. 13251 | Version 09-2019
Pressure ranges
Type Sensor range 1 Sensor range 2 Positive pressure
safety
Burst
pressure
Temperature error
DDS-MR984.5.X.3.K.1 ± 50 Pa - 60 kPa 100 kPa ≤ ± 2% of sensor reading
DDS-MR984.5.W.3.K.1 ± 100 Pa - 60 kPa 100 kPa ≤ ± 1.5% of sensor reading
DDS-MR984.5.M.3.K.1 ±150 Pa - 60 kPa 100 kPa ≤ ± 1.5% of sensor reading
DDS-MR984.5.N.3.K.1 ± 250 Pa - 60 kPa 100 kPa ≤ ± 1% of sensor reading
DDS-MR984.5.S.3.K.1 ± 1,000 Pa - 75 kPa 125 kPa ≤ ± 1% of sensor reading
DDS-MR984.5.2.3.K.1 0 – 100 Pa 0 – 250 Pa 60 kPa 100 kPa ≤ ± 2.5% of sensor reading
DDS-MR984.5.3.3.K.1 0 – 250 Pa 0 – 500 Pa 75 kPa 125 kPa ≤ ± 1.5% of sensor reading
DDS-MR984.5.4.3.K.1 0 – 500 Pa 0 – 1,000 Pa 75 kPa 125 kPa ≤ ± 1% of sensor reading
DDS-MR984.5.5.3.K.1 0 – 1 kPa 0 – 2.5 kPa 85 kPa 135 kPa ≤ ± 1% of sensor reading
DDS-MR984.5.7.3.K.1 0 –5 kPa 0 – 10 kPa 135 kPa 275 kPa ≤ ± 1% of sensor reading
DDS-MR984.5.9.3.K.1 0 – 25 kPa 0 – 50 kPa 200 kPa 400 kPa ≤ ± 1% of sensor reading
DDS-MR984.5.B.3.K.1 0 – 100 kPa 0 – 250 kPa 400 kPa 800 kPa ≤ ± 1% of sensor reading
DDS-MR984.5._.3.K.0 Without display, technical specs as above
DDS-MR984.5._.3.2.0 2-wire 4 – 20 mA, no switching output, no display
Type name
Series
M16 cable gland
Sensor range: see table
Unit of measure: Pa
Output signal
Display
DDS-MR984.5._.3.K.1
0 without display
1 with LED display
K 0 – 10 V or 4 – 20mA, lin/square root extraction, with switching output
2 2-wire 4 – 20 mA, lin/square root extraction, without switching output, without display

Sensors PG1 | Data sheet No. 13251 | Version 09-2019 | 3| 6
Pressure dierential transmitter DDS-M984… DDS-MR984…
Installation
All work (such as installation, electrical connection, startup,
operation, and maintenance) must only be performed by suf-
ciently qualied tradesmen. The respectively applicable local
rules and regulations (e.g. national building codes, electrical/
VDE regulations, etc.) must be observed. Installers and opera-
ting entities are required to suciently familiarize themselves
before startup. Read the product description before operating
the equipment. Verify that the product can be used for the
relevant application without restrictions. We are not liable for
printing errors and changes after printing. Appropriate use
implies compliance with operating and installation instruc-
tions. We are not liable for losses due to inappropriate use.
Unauthorized or inappropriate manipulations or modications
of the device render the operating permit, the product warranty
and warranty claims null and void.
Startup
The 984 pressure dierential transmitter can be operated with
24 V DC or AC.
Hoses must not be kinked or damaged while being connected.
Leaking hoses or hose connections cause malfunctions on the
device or will cause incorrect sensor readings.
Inside hose diameter: 5.5 mm for ideal clamping. Hose clamps
should be used from 25 kPa.
P1 = positive pressure measurements
P2 = negative pressure measurements
P1 & P2 = pressure dierential measurements
The pressure on P1 must always be higher than on P2 to obtain
a correct 0 – 10 V signal.
The output signal is connected to terminals„Out 0 – 10 V“. Note
correct polarity. The load must be selected to avoid exceeding
10 mA output current.
As a nal step, the power supply is connected to the terminals
labeled„In 24 V AC/DC“.
Installation orientation
The orientation error is eliminated with the self-compensating
piezo sensor cell. The installation orientation is arbitrary.
Simple zero point setting
The output signal is calibrated to zero by pressing the M button
while the transmitter is not under pressure.
Switching output (not for 2-wire design)
In addition to the analog output signal, the pressure dierential
transmitter includes an adjustable transistor switching output
with a maximum switching rating of 35 V DC/100 mA.
Pressure display (optional)
In addition to the output signal, the pressure reading is displayed in
Pascal with a red LED.
Terminal assignments
3-wire design
Klemmenbelegung
3-Leiter-Ausführung
Load
Load
0…10 V
4...20 mA
4
3
2
4 SA switching output, npn
3 GO ground or GND
2 Y output signal 0 … 10 V/4 ... 20 mA
1 G power supply 24 V AC/DC
1
24 V AC/DC
npn
2-wire design

Pressure dierential transmitter DDS-M984… DDS-MR984…
4| 6| Sensors PG1 | Data sheet No. 13251 | Version 09-2019
M = Mode S = Set LED
Pressure range toggle
2 pressure ranges are available for selection (see table) for an
optimum adjustment of the pressure range. The lower, sensitive
area is selected with an inserted jumper (default state). When
the jumper is pulled, the higher, less sensitive range is active.
Adjustable response time
The response time can be adjusted in 2 levels to suppress
brief pressure surges and turbulence, e.g. in the air duct. The
response time is long when the jumper is inserted (default
state). Remove the jumper when the fast response time is
desired.
Output signal toggle
The 3-wire output signal version can be toggled. The default
output signal is 0 – 10 V; it can be switched to 4 – 20 mA by
removing the jumper. The 2-wire version is only available with
the 4 – 20 mA output signal..
Conguration
Jumper
function
Inserted Open
Sensor range Low High
Response time Slow Fast
Operating mode Linear Square root
extraction
Output signal 0 – 10 V 4 – 20 mA
Volume ow measurement
A jumper is used to toggle between the measurement metric
„Pressure“ (linear) and„Air volume“ (square root extraction). The
air volume is proportional to the root of the pressure dieren-
tial between the two hose connections (pressure dierential
method).
Adjusting the switching output
(3-wire without display)
This functions is used to set the switching output to„intercon-
nected“ for a pressure dened by you. Apply the pressure or
the pressure dierential at which the switching output should
interconnect. Then press button„S“ for 5 sec until the LED blinks
rapidly (= switching point saved). The LED lights up as soon as
the dened pressure is reached or exceeded.
10
8
6
4
2
00 20 40 60 80 100
% P
Sensor range
V
out

Sensors PG1 | Data sheet No. 13251 | Version 09-2019 | 5| 6
Pressure dierential transmitter DDS-M984… DDS-MR984…
Programming (versions with display)

6| 6| Sensors PG1 | Data sheet No. 13251 | Version 09-2019 Specications subject to change.
Pressure dierential transmitter DDS-M984… DDS-MR984…
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany
Phone [phone] | Fax [phone] | [e-mail] |www.oprg.de
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
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70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
60
70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
60
70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
60
70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
60
70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
60
70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
Masszeichnungen
100
ø16
ø6
40
50
55
60
ø50
ø4
11
18
7.7
ø10
ø 4.5
40
40
60
70.5
65.5
21.5
ø50
ø4
10
ø5
10
984 mit Kabelverschraubung M16x1,5
Befestigungswinkel 6481
Kanalanschluss für
Climaset®6550/6556
Befestigungswinkel 6402Befestigungswinkel 6401
40
60
7
ø5
46
71
2
19
10
2
6482
60
40
10
19.5
90.5
65.5
ø5
Befestigungswinkel 6482
ø6
18.5
80
ø6.5
60∞
Kanalanschluss für
Climaset®6555/6557
ø 3.4
ø 16
ø 25
ø6
65
50
57.5
21.8
7.5
18
59
ø4.5
8.5
DDS...984... Mounting bracket 6481
Duct connection-
nipples 6552
Rubber feed-
throughs 6553
Duct connection-
nipples 6551 Mounting bracket 6401 Mounting bracket 6402
Dimensioned drawing
Mounting bracket 6482