Обзор
Acoustic diagnostics unit SITRANS DA400 and sensor
The SITRANS DA400 acoustic diagnostics unit acoustically measures the structure-borne sound of oscillating displacement pumps.
It consists of an electric diagnostic unit and up to four acoustic sensors.
Область применения
The SITRANS DA400 allows continuous, simultaneous and independent monitoring of up to four delivery valves in a pump for leaks. In addition, another four inputs are available for monitoring standard signals (e.g. diaphragm and temperature monitoring). This means that the condition of an oscillating displacement pump is monitored in every phase of its operation.
The SITRANS DA400 is used in all industries where oscillating displacement pumps are used.
If the acoustic diagnostic unit is used in zones where there is a risk of explosion, sensors can be operated in an Ex zone if safety barriers are used.
Заказные данные
Заказной № |
Вес, кг |
Описание |
Наличие на складе |
Заказать |
7MJ2000-..... |
1 |
АКУСТИЧЕСКИЕ СЕНСОРЫ ДЛЯ АКУСТИЧЕСКОЙ ДИАГНОСТИКИ SITRANS DA400, КОРПУС ИЗ НЕРЖАВЕЮЩЕЙ СТАЛИ С УРОВНЕМ ЗАЩИТЫ IP66/IP68, ЭЛЕКТРИЧЕСКИ ИЗОЛИРОВАН, РАЗРЕШЕННАЯ ТЕМПЕРАТУРА ОКРУЖАЮЩЕЙ СРЕДЫ MAX. -40 TO +110C (-40 TO +230 F), ВЕРСИИ ЕХ +50 C (-4 TO +122 F) AT T6 , РАЗМЕРЫ 26X40X29MM (1.02 X 1.57 X 1.41 IN) |
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Уточните конфигурацию
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7MJ2010-1AA |
1 |
EX-БАРЬЕР ДЛЯ МАКС. 2-Х АКУСТИЧЕСКИХ СЕНСОРОВ, РЕЛЬСОВЫЙ МОНТАЖ, ДЛЯ ЕХ-ЗОНЫ NS32 СООТВ.. NS35/7.5, ВХОДНАЯ ЦЕПЬ ДЛЯ SITRANS DA400, ВЫХОДНАЯ II (2) G ( EEX IB ) (EUROPEAN ATEX), КОРПУС ИЗ ПЛАСТИКА С УРОВНЕМ ЗАЩИТЫ IP20, РАЗРЕШЕННАЯ ТЕМПЕРАТУРА ОКРУЖАЮЩЕЙ СРЕДЫ MAX. -20 TO + 60 C (-4 TO +140 F), РАЗМЕРЫ 77MMX67,5MMX42MM (3.03 X 2,66 X 1.65 IN) |
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|
7MJ2400-..... |
2.5 |
АКУСТИЧЕСКАЯ ДИАГНОСТИКА SITRANS DA400 С ОПЕРАЦИОННОЙ ПАНЕЛЬЮ С ВНЕШНЕЙ СТОРОНЫ, МОНИТОРЫ ДО 4 АКУСТИЧЕСКИХ СЕНСОРОВ И ОПЦИОНАЛЬНО ДЛЯ 4 УНИВЕРСАЛЬНЫХ ВХОДОВ ДЛЯ ЦИФРОВОГО(24V DC ACTIVE/PASSIVE) ИЛИ АНАЛОГОВОГО (0/4 ..20MA) СИГНАЛОВ, 6 ЦИФРОВЫХ ВЫХОДА ДЛЯ СИГНАЛИЗАЦИИ MAKROLON (PLASTIC), IP65,РАЗМЕРЫ 172X320X80MM (6.80 X 12.6 X 3.2 INCH), РАЗРЕШЕННАЯ ТЕМПЕРАТУРА ОКРУЖАЮЩЕЙ СРЕДЫ MAX.20 TO +60 C (-4 TO +140 F) EX-VERSION -20 TO +50 C (-4 TO +122 F) AT T6 |
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Тех. данные
Особенности
- Increase in the availability of the system by:
- Planning maintenance in advance by early recognition of defective components
- Reducing downtimes (no fault searching necessary)
- Increasing maintenance intervals
- Increasing the reliability of the pumps
- Avoiding expensive consequential damage
- Increased safety of critical applications
- Early recognition of a reduction in power
- Increased productivity
Функции
Product features
Continuous and independent status monitoring:
- of the delivery valves, for leaks
- of the membranes, for material fatigue
- of the temperature loading of the hydraulic oil
Communication of the status to superordinate process control systems:
- via digital outputs
- digitally, via PROFIBUS DP or PROFIBUS PA
Simple to operate and parametrize:
- Locally, via digital display and keys
- PROFIBUS DP and PROFIBUS PA
Mode of operation
Measuring principle
Leaks in the delivery valves of oscillating displacement pumps are flows in which cavitation occurs. This results in sound waves that are transmitted to the valve housing, where they are recorded by the structure-borne sound sensor in the SITRANS DA400 on the outside.
The SITRANS DA400 utilizes the fact that with both an open valve and a closed intact valve, no cavitation occurs and the measured sound level thus corresponds to the operating noise of the pump. By contrast, with a closed defective valve cavitation does occur, which can be identified by a period increase in the sound level (see figures). The measured value from the SITRANS DA400 corresponds exactly to this increase in the sound level.
The measurement is carried out exclusively in the ultrasonic range. This filters out the operating noise of the pump and the closing noise of the valves.
Signal from structure-borne sound sensor with intact valve
Signal from structure-borne sound sensor with defective valve
Sensor operation
The structure-borne sound sensor works on the piezoelectric principle. The structure-borne sound is injected into the sensor via the sensor base (mounting surface) and inside it is converted into an electrical voltage by a piezo-ceramic element. This is amplified in the sensor and transmitted via the cable.
The sensor frequency range lies in the ultrasonic range (>20 kHz). The sensor is non-directional, i.e. the angle at which the sound wave is incident on the sensor base is not important.
Mode of operation of the electronics
SITRANS DA400, function diagram of the electronics
Технические данные
SITRANS DA400
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Input
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Acoustic channels
|
|
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10 ms
|
Universal input
|
|
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80 ms
|
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1 s
|
Universal analog current input
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< 105 Ω
|
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0.1%
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0,5%
|
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> 21 mA or < 3,6 mA (at 4 ... 20 mA)
|
- Alarm monitoring hysteresis
|
0.5%
|
|
40 mA, 4 V
|
Universal 24 V-digital signal input
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> 19 kΩ
|
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< 4.5 V or open
|
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> 7 V
|
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> 1 V
|
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± 40 V
|
8,2 V source for NAMUR signal (DIN EN 60947-5-6)
|
|
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8.2 V ± 0.3 V, short circuit-proof
|
|
< 950 Ω
|
- Static destruction limit for incorrect wiring
|
+20 V/-10 V
|
Output
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Digital output
|
|
|
Individually isolated, short circuit-proof
|
|
24 V AC/36 V DC, any polarity
|
|
35 V AC/50 V DC
|
|
100 mA
|
Rated conditions
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|
Installation conditions
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Vertical wall mounting, cables fed in from below
|
Climatic category
|
Class 4K4 to EN 60721-3-4
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Ambient temperature
|
-20 °C ... +60 °C (-4 °F ... +140 °F)
|
Mechanical load
|
Class 4M3 to EN 60721-3-4
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Degree of protection to EN 60529
|
IP65
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Electromagnetic compatibility
|
|
- Interfrence immunity and emitted interference
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To EN 61326 and NAMUR NE 21
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Usage limits for water
|
|
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1 bar a
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≥ 10 bar a
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< 300 1/min
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Design
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|
Weight (without options)
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Approx. 2.5 kg
|
Dimensions (W x H x D) in mm (inch)
|
172 x 320 x 80 (6.8 x 12.6 x 3.2)
|
Housing material
|
Macrolon (polycarbonate + 20% glassfiber)
|
Electrical connections via terminal screws
|
- Rigid 2.5 mm (0.984 inch)
- Flexible 1.5 mm (0.590 inch)
- Flexible with connector sleeves 1.5 mm (0.590 inch)
|
Cable inlet via plastic cable glands
|
|
Power supply
|
|
Rated voltage
|
24 V DC
|
Operating range
|
19 V to max. 36 V DC
|
Current consumption
|
< 100 mA
|
Certificates and approvals
|
|
Explosion protection to ATEX
|
In preparation
|
Communication
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|
PROFIBUS DP
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RS485, switchable terminating resistor
|
Protocol
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Cyclic with Master C1 and acyclic with Master C2
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Software for PC
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SIMATIC PDM
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Sensor for SITRANS DA400
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Structure
|
- Piezo-ceramic sensor with pre-amplifier
- Electronics poured
- 4-wire cable with anti-kink sleeve
|
Rated conditions
|
|
Permissible ambient temperature
|
-40 °C ... +110 °C (-40 °F ... +230 °F)
|
Degree of protection to EN 60529
|
IP66/IP68
|
Mechanical load
|
Class 4M7 to DIN EN 60721-3-4
|
Climatic category
|
Class 4K4 to DIN EN 60721-3-4
|
Design
|
|
Housing material
|
Stainless steel 1.4571 (316Ti SST)
|
Cable
|
Ends with connector sleeves and cable lug for connection to SITRANS DA400
|
Weight
|
125 g (0.276 lb)
|
Dimensions (W x L x H) in mm (inch)
|
26 x 40 x 29 (1.0 x 1.6 x 1.1)
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Power supply
|
3.3 V DC / <5 mA suplly from device
|
Certificates and approvals
|
|
Explosion protection to ATEX
|
In preparation
|
Safety barriers for sensors
|
|
Applications
|
For intrinsically safe energy supply to the acoustic sensors in zone 1. Insert between diagnostic unit and sensors.
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Input
|
Maximum of 2 sensors can be connected.
|
Rated conditions
|
|
Permissible ambient temperature
|
-20 °C ... +60 °C (-4 °F ... +140 °F)
|
Degree of protection to EN 60529
|
IP20
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Design
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|
Housing material
|
Plastic polyamide
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Weight
|
115 g (0.254 lb)
|
Dimensions (W x L x H) in mm (inch)
|
77 x 67.5 x 39.5 (3.0 x 2.7 x 1.6)
|
Certificates and approvals
|
|
Explosion protection to ATEX
|
II (2) G [EEx ib] IIC
|
Чертеж
Sensor for SITRANS DA400, dimensions in mm (inch)
SITRANS DA400, dimensions in mm (inch)
Схема подключения
SITRANS DA400, terminal assignment