Thermokon DPA+ Dual User manual

DPA+ Dual | DPA+ LCD Dual RS485 Modbus
Differential Pressure Transmitter
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
Datasheet
Subject to technical alteration
Issue date: 20.02.2023 • A123
The following illustrations show the version with LCD
»APPLICATION
Differential pressure and volume flow transducer for monitoring differential pressure and volume flow of air and other non-flammable and non-
aggressive gases. LCD models with RGB background light have a transparent cover. Display configuration, k-values for flow calculation (default
1500) and threshold values for color changes can be parameterized via Thermokon USEapp. The option with input for a potential-free contact or
an NTC10k allow a variety of applications. The mounting base (included in delivery) allows mounting on a level surface or mounting on DIN rail
TS35 (35x7,5 mm) according to EN 60715.
»TYPES AVAILABLE
Differential pressure and volume flow transducer optional with display – RS485 Modbus
•DPAx+ Dual RS485 Modbus MultiRange <AZ>
•DPAx+ LCD Dual RS485 Modbus MultiRange <AZ>
Differential pressure and volume flow transducer optional with display and 2 digital inputs – RS485 Modbus
•DPAx+ Dual RS485 Modbus MultiRange <AZ> 2IN
•DPAx+ LCD Dual RS485 Modbus MultiRange <AZ> 2IN
x: 250 | 2500 | 7000
MultiRange: Measuring ranges adjustable at the transducer
<AZ>: automatic zero-point adjustment (optional)
»PRODUCT TESTING AND CERTIFICATION
Declaration of conformity
The declaration of conformity of the products are available on our website https://www.thermokon.de/ .
»NOTES ON DISPOSAL
As a component of a large-scale fixed installation, Thermokon products are intended to be used permanently as part of a building or a
structure at a pre-defined and dedicated location, hence the Waste Electrical and Electronic Act (WEEE) is not applicable. However,
most of the products may contain valuable materials that should be recycled and not disposed of as domestic waste. Please note the
relevant regulations for local disposal.

Page 2 / 7 Issue date: 20.02.2023
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
»SECURITY ADVICE – CAUTION
The installation and assembly of electrical equipment should only be performed by authorized personnel.
The product should only be used for the intended application. Unauthorised modifications are prohibited! The product must not
be
used in relation with any equipment that in case of a f
ailure may threaten, directly or indirectly, human health or life or result in
danger to human beings, animals or assets. Ensure all power is disconnected before installing. Do not connect to live/operati
ng
equipment.
Please comply with
•Local laws, health & safety regulations, technical standards and regulations
•Condition of the device at the time of installation, to ensure safe installation
•
This data sheet and installation manual
Before installation, commissioning and operation, make sure that the correct pressure gauge has been selected with regard to measuring range,
design and, based on the specific measuring conditions, the suitable medium in contact with the medium. Pressure gauges may only be installed
and serviced by trained specialist personnel authorized by the plant operator. Failure to observe the relevant regulations may result in serious
physical injury and/or damage to property.
»TECHNICAL DATA
Measuring values differential pressure, volume flow
Medium air or other non-flammable/non-aggressive gases
Output voltage 0..10 V or 0..5 V, min. load 10 kΩ
(live-zero configuration via Thermokon USEapp)
Network technology RS485 Modbus, RTU, half-duplex, baud rate 9.600, 19.200, 38.400 or 57600, parity: none (2 stopbits), even
or odd (1 stopbit), Fail-safe Biasing required
Power supply 15..35 V = or 19..29 V ~ SELV
Power consumption max. 2,3 W (24 V =) | max. 4,3 VA (24 V ~)
Measuring range velocity 0… 750.000 m³/h (default), optionally configured via Thermokon USEapp
Measuring range pressure
*selectable at the device
type 250
0..+1 | 0..+0.4 | 0..+0.2 | 0..+0.1 |
-0.1..+0.1 | -0.2..+0.2 | -0.4..+0.4
| -0.6..+0.6 inchWC
type 2500
0..+10 | 0..+8 | 0..+6 | 0..+4 | -0..+2
| 0..+1 | 0..+0.4 | -0.4..+0.4
inchWC
type 7000
0..+28 | 0..+20 | 0..+16 | 0..+12 |
0..+10 | 0..+8 | 0..+6 | 0..+4
inchWC
Accuracy pressure
*deviation from calibration
reference device (calibrator)
at range
<1 inchWC: typ. ±0.004 inchWC
at range
≤2 inchWC: ±0.02 inchWC,
>2 inchWC: ±0.04 inchWC
at range
≤8 inchWC: ±0.04 inchWC,
>8 inchWC: ±0.10 inchWC
Zero-point adjustment
(manual)
3 month at range:
≤2 inchWC: 6 month
>2 inchWC: 12 month
12 month
Zero-point adjustment
(automatic)
automatic zero-point adjustment (optional)
Max. working overpressure 160 inchWC
Sensor piezo measuring element
Inputs
(optional)
2IN
2x input for NTC10k or floating contact
Display
(optional)
LCD 1.14x1.38 in. with RGB backlight,
units, pressure: Pa, inchWC, volume flow: m3/h, cfm (configurable)
Enclosure
(type-dependent)
without LCD
enclosure USE-L, PC, pure white, with removable
cable entry
with LCD
enclosure USE-L, PC, pure white, cover PC,
transparent, with removable cable entry
Protection IP65 according to EN 60529
Cable entry M25, for wire max. Ø=7 mm, seal insert for fourfold cable entry
Connection electrical Mainboard
removable plug-in terminal, max. 14AWG
Plug-in card
removable plug-in terminal, max. 16AWG
Connection mechanical pressure connection male Ø=0.2 in / Ø=0.25 in., connection tube: PVC, soft
Ambient condition +14..+122 °F, max. 85% rH short term condensation
Mounting screw mounted onto flat surface, prepared for mounting on DIN rail TS35 (35x7,5 mm) according to
EN 60715

Issue date: 20.02.2023 Page 3 / 7
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
»MOUNTING ADVICES
Before installing the device, please check the leak tightness of the pressure lines. A prerequisite for the operation is a proper installation of all
electrical supply, control and sensing leads as well as the pressurized connection line.
•In order to connect the device, the process lines must be unpressurized
•Consider the suitability of the device for the medium to be measured
•Consider maximum pressures
1.
Mount the DPA+ mounting base in a
suitable location and attach the DPA+.
Note alignment
!
screwed
Rail mounting
2.
Prepare the duct for mounting and
mount the
duct connection piece.
Attention! Observe dimensions!
3.
Connect pressure tubes to the device.
Attention
! Oserve labeling!
4.
Connect pressure tubes to the duct
connection pieces
Below
atmospheric
pressure
-
+
+
-
-
+
Over-
pressure Filter Fan

Page 4 / 7 Issue date: 20.02.2023
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
»CONNECTION PLAN
RS485 cable is looped through, connect both cable shields using the enclosed 2-pol. connect terminal as shown.
DPA+ (LCD) Dual RS485 Modbus MultiRange
DPA+ (LCD) RS485 Modbus 2IN
A+
B-
A+
B-
RS485 cable is looped through, connect both cable
shields using the enclosed 2-pol. Connect terminal as
shown.
◄A+
►A+
◄B-
►B-
►differential pressure 2 | 0..10 V
►differential pressure 1 | 0..10 V
◄GND
◄15..35 V 󰂮/ 19..29 V 
S1
S2
RS485 cable is looped through, connect both cable
shields using the enclosed 2-pol. Connect terminal as
shown.
A+
B-
A+
B-
◄A+
►A+
◄B-
►B-
►differential pressure 2 | 0..10 V
►differential pressure 1 | 0..10 V
◄GND
◄15..35 V 󰂮/ 19..29 V 
◄IN2
►IN2
◄IN1
►IN1
S1
S2

Issue date: 20.02.2023 Page 5 / 7
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
»DIP SWITCHES, MAINBOARD (S1+S2)
Measuring range adjustment – Typ 250 | 2500 | 7000
default
Response time
Output voltage
Unit
default
default
default
»DIP SWITCHES, PLUG-IN CARD
The modbus address of the device is set in the range of 1 ... 31 (binary encoded) using a 5-pole DIP switch. With address 0 via DIP, an extended
address range (32..247) is available via USEapp.
* factory default settings
Termination 120 Ω
Modbus adress
Not active*
active
ON=20(1)*
ON=21(2)
ON=22(4)
ON=23(8)
ON=24(16)
Baud
Sample adress: 26
9600*
19200
Parity
38400
57600
none*
(2-stopbits)
even
(1-stopbit)
odd
(1-stopbit)
none
(1-stopbit)
»CONFIGURATION
The Thermokon bluetooth dongle with micro-USB (Item No.: 668262) is required for communication
between USEapp and USE-M / USE L products. Commercial bluetooth dongles are not compatible.
Application-specific reconfiguration of the
devices can be carried out using the Thermokon USEapp. The
configuration is carried out in the voltage-supplied state.
The configuration-app and the app description can be found in the Google Play Store or in the Apple
App Store.
»APPLICATION NOTICE
The Bluetooth dongle snaps into the socket easily. When removing, please fix the plug-
in card (option PCB) so that it is not
unintentionally pulled out.
ON
1 32 4
5
S1 – Dip-switch 1 (pressure sensor 1)
S2
– Dip-switch 2 (pressure sensor 2)

Page 6 / 7 Issue date: 20.02.2023
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
»MODBUS KONFIGURATION
Modbus addresses:
USE-RS485 Modbus Interface
A detailed description of the Modbus addresses can be found under the following link: → Download
Register 400 = 1 (Unit SI) Register 400 = 2 (Unit Imperial)
Adress Access Description Resolution / Unit Resolution / Unit
8 R / s16
Differential pressure 1
SI 1.0 Pa Imperial 0.001 inWC
9 R / u16
Volumetric flow 1 (16 Bit) (if register address
404 is set to the value 2, the value scales the
unit m³/s)
SI 100.0 m³/h
m³/s Imperial 10.0 cfm
10
R / s16
Differential pressure 2
SI
1.0
Pa
Imperial
0.001
inWC
11 R / u16
Volumetric flow 2 (16 Bit) (if register address
404 is set to the value 2, the value scales the
unit m³/s)
SI 100.0 m³/h
m³/s Imperial 10.0 cfm
50
Low
R / u32
Volumetric flow 1 (32 Bit) (if register address
404 is set to the value 2, the value scales the
unit m³/s)
This register is available since firmware V1.6
(see register 505)
SI 1.0 m³/h
m³/s Imperial 1.0 Cfm
51
High
52
Low
R / u32
Volumetric flow 2 (32 Bit) (if register address
404 is set to the value 2, the value scales the
unit m³/s)
This register is available since firmware V1.6
(see register 505)
SI 1.0 m³/h
m³/s Imperial 1.0 Cfm
53
High
Optional (IN1 | IN2)
NTC10k temperature sensors or floating contacts can be connected to the inputs (IN1 & IN2)
Adress Access Description Values
92
R / s16
Input 1 – Binary signal
0
Contact open
93
R / s16
Input 2 – Binary signal
1
Contact closed
Register 400 = 1 (Unit SI)
Register 400 = 2 (Unit Imperial)
Adress Access Description Resolution / Unit Resolution / Unit
90 R / s16
Input 1 - Temperature NTC10k
(beta value configurable, register address 490,
default: 3864)
SI 0.1 °C Imperial 0.1 °F
91 R / s16
Input 2 - Temperature NTC10k
(beta value configurable, register address 491,
default: 3864)
SI 0.1 °C Imperial 0.1 °F
»FLOW CALCULATION: (DEFAULT PARAMETERS)
=2
with k=1500, fan manufacturer Rosenberg, Comefri, Nicotra Gebhardt, default measuring range 0..750.000 m³/h. Further
calculation formulas, fan manufacturers and k-values can be selected via the USEapp.
Rosenberg ∙Comefri ∙Gebhardt ∙Nicotra Ziehl-Abegg ∙EBM-Papst Fläkt Woods
»AUTOMATIC ZERO-POINT ADJUSTMENT - (OPTIONAL)
Transmitters equipped with the auto-zero adjustment are maintenance free.
The auto-zero adjustment electronically adjusts the transmitter to zero every 10 minutes. The function eliminates all output signal drift
due to thermal, electronic or mechanical effects. The auto-zero adjustment takes approx. 4 seconds after which the device returns to
its normal measuring mode. During the 4 second correction period, the output and display values will freeze to the latest measured
value.
=2
==
1


Issue date: 20.02.2023 Page 7 / 7
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
DPA+_(LCD)_Dual_RS485_Modbus_Datasheet_en-us © 2023
»MANUAL ZERO-POINT ADJUSTMENT (FOR DEVICES WITHOUT AUTO-ZERO FUNCTION)
In normal operation zero point adjustment should be executed depending on the device and
the measuring range.
Attention! For executing zero point adjustment the power supply must be connected
one hour before.
•Release both connection tubes from the pressure terminals + and -
•Press the button until the LED lights permanently
•Wait until the LED flashes again and reinstall the connection tubes to the pressure ports
(note + and -)
»DIMENSIONS (IN.)
»ACCESSORIES (INCLUDED IN DELIVERY)
Mounting base enclosure USE-L Item No. 668361
2x 2 m PVC connection tube Item No. 484268
2x KKS40 kit Item No. 430135
• 2 plastic duct flanges • 4 mounting screws 4x20
Mounting kit universal Item No. 698511
• Cover screw + screw cover• 2 Rawlplugs • 2 Screws (countersunk head) • 2 Screws (rounded head)
»ACCESSORIES (OPTIONAL)
Bluetooth dongle USE for USEapp Item No. 668262
Converter RS485 Modbus-USB incl. driver CD Item No. 668293
USB RS485 Modbus RTU Logger Item No. 809917
RS485 Biasing Adapter Item No. 811378
T-hose connector for pressure hoses Ø=0.16 in. (10 pcs) Item No. 668323
Adapter 90° angle for pressure hoses Ø=0.16 in. Item No. 668330
Metal duct connectors 1.6 in. Item No. 265138