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Binary Input Module

Описание:

Данное решение от TI – 8-канальный модуль цифровых входов, готовый к применению в ПЛК.  Он разработан и протестирован в соответствии с IEC61000-4 EMC и требованиями к индустриальной автоматике, что позволяет разработчикам сократить время выхода на рынок. 8 цифровых входов, до 34 В каждый, подключаются к ПЛК через последовательный интерфейс, что сокращает количество занимаемых выводов контроллера и количество изоляторов. Технология цифровой изоляции с пиковым напряжением 4242 В от TI позволяет изолировать последовательный интерфейс данных и управления от ПЛК. Модуль включает в себя защиту от превышения по току и изолированный блок питания для нужд модуля. Для данного решения доступны полная документация, результаты тестирования, файлы проекта и встроенное программное обеспечение. 

Возможности:

  • Полностью протестировано на соответствие с IEC61000-4 для ESD, EFT
  • Схема защиты входов и ESD защита на 15 кВ
  • Программируемый пользователем предельный ток 2 мА на входах для защиты от превышения тока
  • Гальваническая изоляция шины данных и SPI интерфейса до 4242 В в пике
  • Встроенный индикатор перегрева для отключения входов при возникновении неисправности
  • Тонкий форм фактор 95 x50 x10 мм (ДxШxВ)

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
This reference design enables translation of high DC voltage inputs upto 300VDC into binary logic level voltages that a typical electronic circuit can handle. This solution is very flexible, not only handling input voltages from 18 to 300VDC but also allowing programmable switching thresholds to set binary levels. In addition, this solution enables < ± 3.0% (± 1V measured value step size) error in voltage detection coupled with reliable isolation > 2kV RMS.

Возможности:

High accuracy voltage measurement capability (< ±3% error) Flexible solution handling input voltages from 18V to 300VDC MCU enables programmable switching thresholds Excellent long term reliability with digital isolation included Provides option for wetting current control Output can be either I2C or digital output

Возможность заказа
  • Заказать PCB
Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
The TIDA-00809 TI design showcases a cost optimized architecture that improves resolution of a binary input module. A microcontroller unit (MCU) is shared between two input channels (group isolation) to minimize the cost per channel. Wide input range is covered using an amplifier with gain and a MCU integrated 10-bit analog-to-digital converter (ADC) to measure with in ±3% accuracy. This architecture eliminates the need for multiple hardware versions based on input voltage range as is the case with an opto-coupler based topology. A digital isolator is used to communicate the ADC code or the root-mean-square estimate of the input to the host processor. The design is tested for ESD, EFT and Surge as per IEC61000-4 Level 4.
Возможности:

Measurement accuracy: <±3% over a wide input range for AC/ DC input using 10-bit SAR ADC MCU shared between two channels (group isolation) to minimize cost per channel with additional unassigned input channels for larger channel count group isolation Wide input range covered using an amplifier with two gain stages Choice of basic or reinforced isolation between input and the host processor using digital isolator Onboard current pulse generator (20mA-50mA, 50ms) using MCU PWM output to remove the contamination (anti-burnishing) on the binary input contacts

Документация:
  • Схемотехника
  • BOM
Описание:
The TIDA-00847 TI design showcases space and cost optimized architecture for a 4 channel DC input binary module with improved measurement accuracy and status indication using only two TI products simplifying system design. MCU based binary module improves measurement resolution of binary input resulting in improved system performance including accurate and repeatable fault indications and eliminates the need for multiple hardware versions (use same design for multiple nominal voltage inputs) reducing design, testing, manufacturing and field support efforts. In this TI design 4 input channels are configured as group isolated inputs to minimize cost per channel. A 10-bit analog-to-digital converter (ADC) measures the DC inputs with in ±3% ±1 V accuracy over wide range. Pre-compliance tests for EMI and EMC have been performed.
Возможности:

Binary input module design based on reinforced isolation ISOW7841 or ISOW7841F, digital isolator with integrated high efficiency, power converter with soft-start and 75 mA current output (quad with various configurations for GPIO or SPI or UART interface) simplifying system design MSP430G2332 or MSP430FR2111, MCU based 4 channel DC input or 2-channel AC or DC voltage input measurement type binary Input module ISOW7841 provides 46% efficiency with output ripple of 100mV for 70mA load (pkpk) Accuracy <= ±3% of measured value ±1 V (programming resolution or step size) Meets pre-compliance tests for EMI and EMC as per IEC61000-4 and CISPR22 standards

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
This reference design highlights an architecture that is optimized for size and cost for achieving channel to channel isolation when measuring AC/DC voltage and current signals. Accuracy of ±0.3% is achieved using an ultra low power (<1mW @ 1MSPS) 12-bit ADC and an ARM core MCU. Space savings and component count reduction is achieved using a digital isolator with integrated power converter that isolates channels and ADC and MCU.
Возможности:

Channel to channel isolation using digital isolator with integrated power converter (ISOW7841) AC/DC voltage and current measurement accuracy AC Voltage: < ±0.25% for 5V-300V AC Current: < ±0.3% for 0.5A-50A Ultra low power (<1mW) data acquisition using ADS7043/ADS7044 and TLVx316 Space savings achieved using REF1930 (integrated REF, REF/2) and ISOW7841 (integrated digital isolator, power converter) Low power consumption and simplified multi-SPI interface achieved using MSP432P401R, an ARM® Cortex®-M4F based MCU

Документация:
  • Схемотехника
  • BOM
Описание:
This reference design showcases a data acquisition architecture that uses a dual channel SAR ADC paired with a digital isolator with integrated power converter to achieve phase isolated, simultaneous measurement of voltage and current. Accuracy of <0.3% is achieved using 12-bit, 2-channel, 750ksps ADC while the digital isolator isolates both data and power. An ARM® core MCU with multi-SPI peripherals is used to interface with ADC as it provides flexibility to the interface. A two-chip data acquisition architecture allows users to adapt the ADC performance to their dynamic range and resolution requirements.
Возможности:

Phase isolated simultaneous voltage and current measurement using highly integrated components. Simultaneous AC voltage and current measurement accuracy:– AC Voltage: < ±0.25% for 5 to 300 V. – AC Current: < ±0.3% for 0.5 to 50 A Data acquisition specifications: 12-bit, 14-bit at 750ksps pin compatible ADC family Reinforced isolator at 100Mbps data rate with integrated power converter Digital processing specifications: ARM® 32-Bit Cortex®-M4F CPU for advanced measurement and monitoring computations Multi-SPI interface with 8-channel DMA to interface with multiple ADCs Performance vs. space trade-off using two-chip architecture

Документация:
  • Схемотехника
  • BOM