Danfoss 7225-Anl Pressure Transmitter Instruction Manual

Danfoss 7225-Anl Pressure Transmitter

Specifications

• Product Name: Pressure Transmitter Type 722x-Anl
• Dual pressure sensor (2 measuring channels)
• Pressure and differential pressure measuring transducer
• Calibratable with multi-range switching
• Active output with Automatic Output Switching (AOS)
• Output Options: 0-10 V / 4-20 mA
• Dimensions: 126 x 90 x 50 mm

Product Usage Instructions

Installation and Mounting

1. Ensure the area is free of aggressive or flammable gases.
2. Mount the pressure transmitter securely using the provided connection set.
3. Connect the electrical cables following the specified wiring diagram.
4. Adjust the cable gland to fit the cable size (max. inner diameter 10.4 mm).
5. Maintain humidity levels below 95% RH.

Calibration and Setup

1. Select the appropriate pressure range for each channel.
2. Utilize the multi-range switching feature if needed.
3. Configure the output type (0-10 V / 4-20 mA) based on requirements.
4. Adjust the offset and zero point as needed for accurate readings.

Automatic Output Switching:
The patented Automatic Output Switching feature allows for automatic switching between output modes based on network resistance.

Status LED:
The status LED indicates the current operating mode and can assist in manual adjustments of offsets.

Frequently Asked Questions (FAQ)

• Q: What is the purpose of the Automatic Output Switching feature?
  A: The Automatic Output Switching feature automatically switches between voltage and current output based on network resistance, ensuring compatibility with different systems.

• Q: How do I calibrate the pressure transmitter?
  A: To calibrate the pressure transmitter, adjust the pressure ranges, output type, and offsets as required using the provided controls and following the user manual instructions.

Operating Instructions, Mounting & Installation
Dual pressure sensor (2 measuring channels), pressure and differential pressure measuring transducer, incl. connection set, calibratable, with multi- range switching and active output (Automatic Output Switching)

Pressure Transmitter Type 722x-Anl

Type 722x-Anl

• Patented quality product (patent no. DE 10 2015 015 941 B4)
• Calibratable dual pressure sensor Type 722x-Anl (series) with 2 x 8 switchable measuring ranges, 2 automated output signals (32 devices in one), housing with pressure connection nozzle from impact-resistant plastic, with cable gland, underpressure or differential pressure of the air. The pressure measuring transducer automatically detects the required output type and converts the measurands into the required standard signal of 0–10 V or 4…20 mA (Automatic Output Switching).
• It is used in the clean room, medical and filter technology, ventilation and air conditioning ducts, spray booths, large-scale catering facilities, for filter monitoring and level measurement or for triggering frequency converters. Media measured with this pressure measuring transducer are clean air (non-precipitating), or other gaseous, non-aggressive, non-combustible media.
• Both pressure sensors with piezoresistive measuring element are temperature-compensated and guarantee a high level of reliability and accuracy. The device has a push-button for manual zero point matching as well as an offset potentiometer for correcting the final value. The sensor is factory-calibrated; an environmental precision adjustment by an expert is possible. The delivery includes a connection set ASD-06 (2 m connection hose, two pressure connection nipples, screws).

Type 722x-Anl
Dual pressure sensor (2 measuring channels), pressure and differential pressure measuring transducer, Deluxe

Pressure range
(adjustable per channel)| Type| Output
automatically)| Danfoss

Part Number

---|---|---|---
(1) max. – 500… + 500 Pa| | |
(2) max. – 500… + 500 Pa| | |
Channel (1) ad (2):| Type 7225-Anl| 0 -10 V / 4…20 mA| 134B9404

• 0 … 100 Pa  ⁄  – 100 … + 100  Pa
• 0 … 200 Pa  ⁄  – 200 … + 200  Pa
• 0 … 300 Pa  ⁄  – 300 … + 300  Pa
• 0 … 500 Pa  ⁄  – 500 … + 500  Pa

| | |
(1) max. – 7000…+ 7000 Pa| | |
(2) max. – 7000…+ 7000 Pa| | |
Channel (1) and (2):| Type 7227-Anl| 0 -10 V / 4…20 mA| 134B9406

• 0 … 1000 Pa  ⁄  – 1000 … + 1000 Pa
• 0 … 3000 Pa  ⁄  – 3000 … + 3000 Pa
• 0 … 5000 Pa  ⁄  – 5000 … + 5000 Pa
• 0 … 7000 Pa  ⁄  – 7000 … + 7000 Pa

| | |
(1) max. – 500… + 500 Pa| | |
(2) max. – 7000…+ 7000 Pa| | |
Channel (1):| Type 7229-Anl| 0 -10 V / 4…20 mA| 134B9405

• 0 … 100 Pa  ⁄  – 100 … + 100  Pa
• 0 … 200 Pa  ⁄  – 200 … + 200  Pa
• 0 … 300 Pa  ⁄  – 300 … + 300  Pa
• 0 … 500 Pa  ⁄  – 500 … + 500  Pa

| | |
Channel (2):| | |

• 0 … 1000 Pa  ⁄  – 1000 … + 1000 Pa
• 0 … 3000 Pa  ⁄  – 3000 … + 3000 Pa
• 0 … 5000 Pa  ⁄  – 5000 … + 5000 Pa
• 0 … 7000 Pa  ⁄  – 7000 … + 7000 Pa

| | |

• Multi-range switching:
  • The pressure ranges depend on the device type and
  • for each measuring channel, they are separately adjustable via DIP switch.
• Automatic Output Switching:
  • Patented analogue interface (patent no. DE 10 2015 015 941 B4)
  • Device automatically detects the required output type 0–10 V or 4…20 mA.

ACCESSORIES

Pressure range

– 7000…+ 7000 Pa

| ****

– 500…+ 500 Pa

0…+1000 Pa| 0…+100 Pa
0…+3000 Pa| 0…+200 Pa
0…+5000 Pa| 0…+300 Pa
0 … +7000 Pa| 0 … +500 Pa
–1000…+1000 Pa| –100…+100 Pa
–3000…+3000 Pa| –200…+200 Pa
–5000…+5000 Pa| –300…+300 Pa
–7000 … +7000 Pa| –500 … +500 Pa
Measuring channel 1

DIP 1| DIP 2| DIP 3
OFF| OFF| OFF
O N| OFF| OFF
OFF| O N| OFF
O N| O N| OFF
OFF| OFF| O N
O N| OFF| O N
OFF| O N| O N
O N| O N| O N
Measuring channel 2

DIP 4| DIP 5| DIP 6
OFF| OFF| OFF
O N| OFF| OFF
OFF| O N| OFF
O N| O N| OFF
OFF| OFF| O N
O N| OFF| O N
OFF| O N| O N
O N| O N| O N
Mode

Measurement signal filtering

Selectable time interval

| DIP 7
10 s (default)| OFF
1 s| O N
Note: DIP 8 and 9 are not defined!
Mode
Measurement signal filtering

Selectable time interval

| DIP 7
10 s (default)| OFF
1 s| O N
Note: DIP 8 and 9 are not defined!

TYPES OF MONITORING:

• (A) Below-atmospheric pressure:
  • P1 (+) is not connected but open against atmosphere
  • P2 (–) connected to inside of duct
• (B) Filter:
  • P1 (+) connected upstream of filter
  • P2 (–) connected downstream of filter
• (C) Ventilator:
  • P1 (+) connected downstream of ventilator P2 (–) connected upstream of ventilator Pressure connections at the pressure switch are marked with
  • P1 (+) for higher pressure and P2 (–) for lower pressure.

Automatic Output Switching

Patented analogue interface for automated output switching
(Patent no. DE 10 2015 015 941 B4)
Switching on the device will analyse the network connected to the outputs and set the relevant output type U or I.
If one of the outputs is detected as a current output, both outputs are configured as output type I. Using it as a mix of current and voltage output is not possible.
The status LED signals the detected output type.

• Network resistance > 15 kiloohms => U output 0–10 V
• Network resistance < 450 ohms => I output 4…20 mA

Manually adjusting the offset:
A potentiometer on the PCB is used to adjust the offset. When the system is delivered, the potentiometer is in centre position and lacquer-sealed.
The setting range is approx. ± 10% of the pressure range.
You can use a different reference point other than the zero point.

Automated zero point adjustment:

1. To adjust the zero point, operate the device for at least 60 minutes.
2. Connect the pressure inputs P(+) and P(-) with a hose (pressure difference = 0)
3. To set the zero point, keep the AUTO Z push-button pressed for approx. 10 seconds.

The status LED on the PCB blinks in red to signal a request for matching. Following the countdown, the currently measured value is saved as an offset value and cannot be lost even at zero voltage.
The status LED acknowledges correct matching by switching to the output display (green or orange).

Please note:
Releasing the push button during countdown will cancel the zero-point adjustment!

Status-LED
The status LED on the PCB shows the current operating mode:

• green ….. blinking ………. switching on the device
• green ….. continuous light U output 0–10 V
• orange …. continuous light I output 4…20 mA
• red ……… blinking ……….AUTO Zero request

U – variant

• (Range: 0…+ xx Pa)
  After successful zero point calibration, the output voltage is 0 V at 0 Pa pressure difference (with the offset knob in central position)!

• Output voltage 0…10 V
  for pressure difference from 0 Pa to final value

U – variant

• (Range: – xx … + xx Pa)
  After successful zero point calibration, the output voltage is 5 V at 0 Pa pressure difference (with the offset knob in central position)!

• Output voltage 0…10 V
  for pressure difference – ΔP … +ΔP

I – variant

• (Range: 0…+ xx Pa)
  After successful zero point calibration, the output current is 4 mA at 0 Pa pressure difference (with the offset knob in central position)!

• Output current 4…20 mA
  for pressure difference from 0 Pa to final value

I – variant

• (Range: – xx … + xx Pa)
  After successful zero point calibration, the output current is 12 mA at 0 Pa pressure difference (with the offset knob in central position)!

• Output current 4… 20 mA
  for pressure difference – ΔP … +ΔP

SUPPLY VOLTAGE :

• For operating voltage reverse polarity protection, a one-way rectifier or reverse polarity protection diode is integrated in this device variant. This internal one-way rectifier also allows operating 0 – 10 V devices on AC supply voltage.
• The output signal is to be tapped by a measuring instrument. Output voltage is measured her against zero potential (O V) of the input voltage!
• When this device is operated on DC supply voltage, the operating voltage input UB+ is to be used for 15…36 V DC supply and UB – or GND for ground wire!
• When several devices are supplied by one 24 V AC voltage supply, it is to be ensured that all ”positive“ operating voltage input terminals (+) of the field devices are connected with each other and all ”negative“ operating voltage input terminals (–) (= reference potential) are connected together (in-phase connection of field devices). All outputs of field devices must be referenced to the same potential!
• In case of reversed polarity at one field device, a supply voltage short- circuit would be caused by that device. The consequential short-circuit current flowing through this field device may cause damage to it.
• Therefore, pay attention to correct wiring!

Conversion table for pressure values:

General notes
This device can be mounted in any position. The voltage output is short- circuit proof. Applying overvoltage at the voltage output will destroy this device. Pressure ranges are indicated on the device label. Applying measuring pressures beyond that range will cause mismeasurements and increased deviations or may destroy the device.

• Attention! When leading in cables, make sure, they do not go under the board.
  This might buckle or damage hose connections!

• Pressure inputs are “poled“ i.e. the above-atmospheric pressure line must be connected at input P+ and the below-atmospheric pressure line must be connected at input P–.

• At an adjusting element, the output signal can be offset by ± 10 % of the final value of the measuring range. In this way, possible ageing or drift effects can be compensated.

• If this device is operated beyond the specified range, all warranty claims are forfeited.

Our “General Terms and Conditions for Business“ together with the “General Conditions for the Supply of Products and Services of the Electrical and Electronics Industry“ (ZVEI conditions) including supplementary clause “Extended Retention of Title“ apply as the exclusive terms and conditions.

In addition addition, the following points are to be observed:

• These instructions must be read before installation and putting in operation and all notes provided therein are to be regarded!
• A suitable weather and sun protection hood must be used when installed outdoors.
• Devices must only be connected to safety extra-low voltage and under dead-voltage condition. To avoid damages and errors the device (e.g. by voltage induction) shielded cables are to be used, laying parallel with current-carrying lines is to be avoided, and EMC directives are to be observed.
• This device shall only be used for its intended purpose. Respective safety regulations issued by the VDE, the states, their control authorities, the TÜV and the local energy supply company must be observed. The purchaser has to adhere to the building and safety regulations and has to prevent perils of any kind.
• No warranties or liabilities will be assumed for defects and damages arising from improper use of this device.
• Consequential damages caused by a fault in this device are excluded from warranty or liability.
• These devices must be installed and commissioned by authorised specialists.
• The technical data and connecting conditions of the mounting and operating instructions delivered together with the device are exclusively valid. Deviations from the catalogue representation are not explicitly mentioned and are possible in terms of technical progress and continuous improvement of our products.
• In case of any modifications made by the user, all warranty claims are forfeited.
• This device must not be installed close to heat sources (e.g. radiators) or be exposed to their heat flow. Direct sun irradiation or heat i rradiation by similar sources (powerful lamps, halogen spotlights) must absolutely be avoided.
• Operating this device close to other devices that do not comply with EMC directives may influence functionality.
• This device must not be used for monitoring applications, which serve the purpose of protecting persons against hazards or injury, or as an EMERGENCY STOP switch for systems or machinery, or for any other similar safety-relevant purposes.
• Dimensions of housing or housing accessories may show slight tolerances on the specifications provided in these instructions.
• Modifications of these records are not permitted.
• In case of a complaint, only complete devices returned in original packing will be accepted.

Notes on commissioning:
This device was calibrated, adjusted and tested under standardised conditions. When operating under deviating conditions, we recommend performing an initial manual adjustment on-site during commissioning and subsequently at regular intervals.

Commissioning is mandatory and may only be performed by qualified personnel!
These instructions must be read before installation and commissioning and all notes provided therein are to be regarded!

Pressure Transmitter Type 722x-Anl

© Copyright by S+S Regeltechnik GmbH
Nachdruck, auch auszugsweise, nur mit Genehmigung der S+S Regeltechnik GmbH.
Reprint in full or in parts requires permission from S+S Regeltechnik GmbH.

S+S REGELTECHNIK GMBH

• THURN-UND-TAXIS- STR. 22
• 90411 NÜRNBERG ⁄ GERMANY
• FON +49 (0) 911 ⁄ 5 19 47- 0
• mail@SplusS.de
• www.SplusS.de

References

• S+S Regeltechnik | Ihr sensorik Partner

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