Oppermann Regelgeräte SENSO-X PPX User manual

Dierential pressure indicator / monitor / transmitter
SENSO-X® PPX
Sensors PG1 | Data sheet No. 13160 | Version 07-2021 | 1| 6
• Large LCD display
• Dierential pressure displayed in Pa or
lter contamination level displayed in %
as numerical value and bar
• Limit displayed in Pa
• Working range displayed (Range)
• Three-color LED: red for limit value overshoot,
yellow for fault and green for undershoot
• Temperature / Absolute pressure transducer
• NFC parametrisation of limit, range max,
signal range for analog output
• Optional Modbus output
• Power supply: 24 V AC at 50/60 Hz or 24 V DC
• Available in two built-in and one surface-
mounted version
Technical data
Housing: high impact ABS
Front panel color: antique white
Lower housing color: anthracite
Protection class: surface-mounted type (AP) IP 65
built-in type IP 54 /
built-in type with additional sealing
(accessory) IP64
Operating temperature: -20 °C to 65 °C
Storage temperature: -20 °C to 70 °C
Relative humidity: max. 95 % non-condensing
Front cover dimensions
- square: 182 x 140 x 21 mm [L x W x H]
- round: 143 mm Ø
Dimensions of
surface-mounted type: 165 x 71 mm [Ø x T]
Hose connection: 2x 6 mm Ø
Working and
measuring ranges: see table
Working range: adjustable via keys and NFC-Tool
Burst pressure: 20 kPa (PPX1000)
40 kPa (PPX4000)
Protection class: II (IEC 60536)
Error margin: +/- 1 % of measuring range
(@ -5 to 65 °C)
Power consumption: 24 V DC 32 mA
24 V AC 58 mA
Long-term stability: ≤ ± 0.5 % FS/a
Supply voltage: 13.5 – 36 V DC or
13.5 – 30 V AC at 50/60 Hz
Output analog: linear 0 – 10 V (max. 0.1 mA) or
4 – 20 mA (max. load 600 Ω).
Output digital: relay (250 V AC 6 A, 30 V DC 5 A),
changeover switch, closed-circuit
principle, freely selectable limit value.
Modbus optional.
Cable gland: M16
Cable connection: Spring terminals 0.2 – 1.5 mm²
Installation
All work (such as installation, electrical connection, startup, ope-
ration, and maintenance) must only be performed by suciently
qualied tradesmen. The respectively applicable local rules and
regulations (e.g. national building codes, electrical/VDE regula-
tions, etc.) must be observed. Installers and operating 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 instructions. We are not liable for losses
due to inappropriate use. Unauthorized or inappropriate mani-
pulations or modications of the device render the operating
permit, the product warranty and warranty claims null and void.
Types
TypeType MeasuringMeasuring
rangerange
Working rangeWorking range
(output signal)(output signal)
Units ofUnits of
measure /measure /
output*output*
Limit valueLimit value
monitoringmonitoring
PPX1000 0 – 1,000 Pa Freely selectable
0 – 1,000 Pa…
Pa, %
Freely selectable.
default: 1,000 Pa
LED signal +
switching output
for overshoot
PPX4000 0 – 4,000 Pa Freely selectable
0 – 4,000 Pa…
Pa, % Freely selectable.
default: 1,000 Pa
LED signal +
switching output
for overshoot
* analog output 0 – 10 V or 4 – 20 mA linear depending on selected working range and unit of
measure.

Dierential pressure indicator / monitor / transmitter SENSO-X® PPX
2| 6| Sensors PG1 | Data sheet No. 13160 | Version 07-2021
Built-in version
Mill a 115 mm Ø hole in the sandwich plate or cabinet door
and push the functional part through the opening from the
front. The mounting direction is indicated by an arrow pointing
upward on the back of the device. Screw the threaded rod
into the threaded sleeve with a screwdriver; slip the mounting
bracket over it and secure with a wing nut. When connecting
the pressure transfer hoses, care must be taken to comply with
the direction of the pressure (+/-). Finally, the front panel can be
snapped into place.
Surface-mounted housing
Screw the functional part onto a wall, duct or similar and then
connect it to the power and pneumatic lines. Then slip the ring
cover over the functional part and snap on the front cover.
Design
The built-in version of the SENSO-X®PPX consists of a round
section and a square or round front cover. The instrument is
optimized for installation in ventilation devices and control
cabinets. The two pressure test points, marked + (positive
pressure side) and - (negative pressure side), are sunk into the
housing on the back. In the middle is a threaded sleeve. Attach
the retaining bracket using the supplied threaded rod and wing
nut. The wing nut is secured against loosening. Two cable
breakthroughs are provided on the back of the housing. Two
M16 x 1.5 screw joints are included in the assembly kit. An
integrated O-ring serves to seal the functional part against the
mounting surface. The arrow on the back of the device points
upward in the correct mounting position.
The surface-mounted version of the SENSO-X®PPX consists of
a round functional part with three screw-on mounting brackets,
a ring cover and a snap-on front cover. The two measurement
connections, marked + (positive-pressure side) and – (negative-
pressure side), exit at the bottom. Exiting at the bottom are also
two strain relief elements.
Built into the functional part in all versions, and visible from the
front, are an LCD display, an LED to indicate when limit values
are exceeded and 4 function keys.
After installation and conguration of the device, the front
cover is snapped onto the functional part. Due to 3 guided
notches this is only possible in the correct position. Removing
the front cover is done by pulling with both hands or by using
a screwdriver.
Operating principle
The measured dierential pressure is guided over the connecting
nipples with exible hoses onto the piezoelectric dierential
pressure sensor and electronically evaluated and displayed
on the LCD indicator. The limit can be programmed using a
key situated behind the front cover of the device. In the same
way, the value is passed on to the analog output, according to
the working range. The threshold set, monitors the available
measured values and reports an exceeded limit to the relay.
Activation and operation
Make all electrical connections before connecting the supply
voltage. Connect the 24 V supply voltage with the correct polarity
to start up the SENSO-X® PPX.
The device is ready for use immediately.
To set the parameters either take o the front panel and enter
the desired settings via the 3 keys or use the NFC tool (Windows
program for PCs: see Specication Sheet 13180; or Android App
for smartphones / tablets in the Google Play Store).
Setting display unit (dimension)
A brief push of the lower key (S1) in normal operation mode
switches the setting back and forth between Pa and %. If, e.g., %
is chosen as the unit of measure, the lter contamination level
is shown in numerals in % of the current limit value as well as
through an indicator bar.
J1
J2
J3
LED
S1
S2 S3
ZERO
S5
ON

Sensors PG1 | Data sheet No. 13160 | Version 07-2021 | 3| 6
Dierential pressure indicator / monitor / transmitter SENSO-X® PPX
J1
J2
J3
LED
S1
S2 S3
ZERO
S5
ON
CO
NC
NO
24V
0V
Out mA
Out V
Electrical connection
If the relay drops o (or limit is exceeded, or voltage drops),
COM and NC are connected to each other.
For Modbus connection to terminal J1 see next page.
Programming the SENSO-X® PPX
Valid for software versions 1.0.2.3 and higher
While programming, the current values on the display and the
analog output are frozen. Hold down the lower key (S1) to enter
the programming mode. The adjustable parameter is displayed
in ashing mode. Press S1 repeatedly to move through the
menu in the following sequence:
• Limit (value) innitely adjustable between 0 Pa and the upper
end of the working range
• Range (working range) innitely adjustable
PPX1000: 0 – 1,000 Pa
PPX4000: 0 – 4,000 Pa
• Out (analog output setting): 4 – 20 mA or 0 – 10 V
• BUS ADDR* (Bus Address): 1 – 127
• BAUD* (Baud rate): 9.6k (default), 14.4k, 19.2k, 38.4k or
56k baud
• PAR* (Paritätseinstellung Modbus): Even, Odd or None
• TEMP GRAD CEL (temperature on the circuit board in °C)
• PRESS AMBI hPA (absolute atmospheric pressure inside the
device housing, shown in hPa)
• SW VERS (Software version)
• FACTORY RESET (resets the device to factory settings)
* for Modbus versions only
Use the keys at the top left (S2) and top right (S3) to change the
parameter value shown in the ashing display area:
Short keystroke →single steps,
Long keystroke →increases rate of change
The upper limit is to be entered in Pa.
Overshoot of the set limit value is indicated by the LED
switching from green to red. The relay drops out on limit value
overshoot (as it does on voltage failure).
The working range extends to the value in Pa, that corresponds
to an analog output of 20 mA or 10 V. This value can be set
under the menu item Range.
For example: set working range 250 Pa
at 0 Pa, the AO is 4 mA or 0 V
at 250 Pa, the AO is 20 mA or 10 V
Save (OK)
After 10 s without a keystroke the set values are saved
automatically and the display and the analog output return to
operating mode.
Factory settings
To reset the device to its factory settings, select the menu item
Factory Reset. The display ashes“ZERO”. Hold down the“ZERO”
key for 3 s. Then the display ashes“DONE”. All previous settings
of the limit value and working range as well as any bus settings
return to their default values.
0-point adjustment
It is possible for pressure readings to drift upwards or down-
wards by up to a few pascal for a period of up to four weeks
after initial start-up. This is no defect. To compensate for
this drift you can perform a manual zero-point adjustment.
Depressurize the measurement inputs (draw o both hoses).
Hold down the ZERO key for ca. 3 s. The display ashes„ZERO“.
Briey press the S1 key. The device recalibrates and the display
ashes“DONE”for ca. 10 s.
Caution:
Disconnect all power supplies before opening the housing.
The housing may only be opened by a trained electrician.
Observe supply and switching voltage ratings. Observe the
following symbols on the device:
Danger – High Voltage!
Disconnect power supply before working
on the device
Observe Instructions
Note:
Floating switch contacts “CO, “NC” and“NO”may only be used
for 230 V AC or 24 C AC/DC .
Disconnection or electrical protection equipment must be
provided by the customer. The 24V AC/DC supply voltage
requires a local fuse for max. 6 A or a supply unit with a
power output limit of 6 A.

Dierential pressure indicator / monitor / transmitter SENSO-X® PPX
4| 6| Sensors PG1 | Data sheet No. 13160 | Version 07-2021
Register PWM
address Name File type Raw data Description
0 (0x00)
40001 pressure unsigned 16 0 –1,000 or 4,000 measured dierential pressure in Pa
1 (0x01)
40002 limit unsigned 16 0 –1,000 or 4,000 set limit value in Pa
2 (0x02) 40003 unassigned
3 (0x03) 40004 output analog unsigned 16 0 or 1 0 = 0 – 20 mA or 0 – 10 V
1 = 4 – 20 mA or 2 – 10 V
4 (0x04) 40005 range unsigned 16 0 – 1,000 or 4,000 Working range in Pa
0 – 1,000 or 4,000
5 (0x05) 40006 unassigned
6 (0x06) 40007 unassigned
7 (0x07) 40008 unit of measure unsigned 16 7 or 8 7 = %
8 = Pa
8 (0x08) 40009 unassigned
9(0x09) 40010 unassigned
10 (0x0A) 40011 unassigned
11 (0x0B) 40012 unassigned
Modbus RTU
Overview of registers
The sliding switch S5 is for inserting a 120 ohm terminal resistor.
Ex factory the switch is in o-position (OFF pos. = left).
Default (factory) Modbus settings
Baud rate: 9600
data bits: 8
start bits: 1
stop bits: 1
Modbus address: 1
parity: even
The following Modbus parameter options are available via the menu or the NFC tool conguration program:
bus adresse: 1-127
baud rate: 9.6k, 14.4k, 19.2k, 56k
parity: even (1 startbit, 8 datenbits, 1 stopbit),
odd (1 startbit, 8 datenbits, 1 stopbit),
none (1 startbit, 8 datenbits, 2 stopbits)
Implemented Modbus function: Read Holding Registers function 0x03
Caution:
All cable installation and connection work must be left to a duly qualied elec-
trician. Make sure that all cables are connected in accordance with the relevant
electrical regulations. The cable sheath must reach as close as possible to the
terminals. Braided wires longer than 10 mm must be secured near the terminal
with a cable clip or similar or must be insulated in pairs using, e.g., suitable shrink
tubing (see installation example).
Installation example:
Modbus connection diagram:
Terminal J1 only present in bus version.
For electrical connections see previous page.

Sensors PG1 | Data sheet No. 13160 | Version 07-2021 | 5| 6
Dierential pressure indicator / monitor / transmitter SENSO-X® PPX
Example of Modbus telegram (hexadecimal notation)
Request:
Tx:[time stamp]-01 03 00 00 00 01 84 0A
from left to right:
“01”= Modbus address of SENSO-X, here = 1
“03”= function code “Read holding register”
“00”= high byte of start register (1st register to be read out), here = 0
“00”= low byte of start register, here register no. 0 = dierential pressure
“00 01”= number of registers read, here = 1
“84 0A” = CRC
Response – dierential pressure
Rx:[time stamp]-01 03 02 01 F7 F8 52
from left to right:
“01”= responding Modbus address, here = 1
“03”= function code
“02”= number of response data bytes, here = 2
“01”= high byte of 1st register, here = 0x0100h = 256d
“F7”= low byte of 1st register, here = 0xF7h = 247d -> 256 + 247 = 503 Pa
“F8 52”= CRC
12 (0x0C) 40013 temperature signed 16 -300 – 1,050 temperature on circuit board in
1/10°C from -30 to 105 °C
13 (0x0D) 40014 atmospheric
pressure unsigned 16 2,600 – 12,600 absolute atmospheric pressure in housing in 1/10 hPa
from 260 hPa to 1,260 hPa
14 (0x0E) 40015 sensor error unsigned 16 0 or 1 0 = no sensor error
1 = sensor error
15 (0x0F) 40016 measured limit unsigned 16 0 – 100 0 to 100 %
16 (0x10) 40017 state of switching
output unsigned 16 0 or 1 0 = inactive 1 = active
17 (0x11) 40018 LED status unsigned 16 0 – 3 0 = LED o
1 = green
2 = yellow
3 = red
18 (0x12) 40019 rmware version unsigned 16 1.0.1.1 and higher “1018”means FW version 1.0.1.8
19 (0x13) 40020 type unsigned 16 0 – 4 0 = PPX1000
1 = PPX4000
2 = VPX1000
3 = VPX4000
20 (0x14) 40021 Modbus address unsigned 16 1 – 127 1 – 127

6| 6| Sensors PG1 | Data sheet No. 13160 | Version 07-2021 Specications subject to change.
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany
Phone [phone] | Fax [phone] | [email protected] |www.oprg.de
Dierential pressure indicator / monitor / transmitter SENSO-X® PPX
Overview of the SENSO-X® PPX in its built-in version
3 keys
Wing nut
Square front type ... 00 Round front type ... 01
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Android app
SENSO-X® NFC Tool tool for Android smartphones:
download here now!
Windows version: downloadable from our website.