MAX14914ATE+T

DESIGN SOLUTIONS INDUSTRIAL Finally – Digital IO Means Digital IO! Introduction Industry 4.0 is a new byword for the modern factory environment. It consists of dozens of networked controllers continuously monitoring inputs from hundreds or even thousands of sensors such as switches and level detectors. Simultaneously, signals are sent to a similar number of output devices such as valves, sole...
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Технические характеристики

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Корпус QFN-16 TQFN16
Совместимость входной логики Дискретный вход по стандарту IEC61131-2 для входов типа 1, 2 или 3
Кол-во выходных каналов
Максимальный ток на выходе
  Примечание: Конфигурация выхода: Ключ верхнего плеча (high side) либо комплементарный выход (push-pull) Задержка распространения сигнала между входом и выходом не превышает 2 мкс
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DESIGN SOLUTIONS INDUSTRIAL Finally – Digital IO Means Digital IO! Introduction Industry 4.0 is a new byword for the modern factory environment. It consists of dozens of networked controllers continuously monitoring inputs from hundreds or even thousands of sensors such as switches and level detectors. Simultaneously, signals are sent to a similar number of output devices such as valves, solenoids or motor drives. In this design solution, we discuss how electronic marshalling has simplified the process of connecting this expanding set of field wiring back to the controller. We then present an innovative solution which introduces a new degree of flexibility to the electronic marshalling approach. Wired Marshalling Until recently, the standard way of connecting field I/O devices to a programmable logic controller (PLC) has been through traditional wired marshalling as illustrated in Figure 1. Multicore cables run wires from the field devices located on the factory floor to the terminal blocks of marshalling panels, usually located in an I/O room. Here, the wiring is crossmarshalled so that each field device is connected to the I/O card of the appropriate controller channel. wires are coming from and going to, leading to errors if wires are incorrectly connected or even left completely unconnected. Debugging and testing each connection can be time-consuming and laborious for technicians and engineers alike, potentially introducing costly delays to the commissioning of a new process. In theory, once debug is complete, the system should run correctly but additional problems can emerge if unforeseen changes are required late in the project. Sometimes it may be necessary to add a new field device. For example, if a temperature switch is changed to a temperature transmitter, then a digital input will need to be changed to an analog input. An even worse situation occurs if new field devices are added to the system but the marshalling panel does not have enough spare connections of the required type to accommodate them. In this case, the controller would need to be replaced, potentially adding additional cost and delay to the project. Electronic Marshalling Wired marshalling has begun to be replaced by electronic marshalling, a new approach to signal routing in process automation (Figure 2). DC Power Backplane Valve (Factory Floor) Electronic Marshalling via Digital Bus Each slot contains dedicated DI/DO Card Actuator (Factory Floor) Valve (Factory Floor) Actuator (Factory Floor) Sensor (Factory Floor) Sensor (Factory Floor) Figure 1. Wired Marshalling Figure 2. Electronic Marshalling This approach has the potential to cause problems. For example, during cross-marshalling, it is difficult to keep track of which This technique was developed to prevent the human errors associated with the manual element of wired marshalling, www.maximintegrated.com/design-solutions 1 PDF
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Finally – Digital IO Means Digital IO! The MAX14914 is a high-side/push-pull driver that operates as both an industrial digital output (DO) and an industrial digital input (DI)

Дата модификации: 21.11.2019

Размер: 164.4 Кб

3 стр.

Click here for production status of specific part numbers. MAX14914 High-Side Switch with Settable Current-Limiting, Push-Pull Driver Option and Digital Input Configuration General Description Benefits and Features The MAX14914 is a high-side/push-pull driver that operates as both an industrial digital output (DO) and an industrial digital input (DI). The MAX14914 is specified for operation with supplies up to 40V. The high-side switch current is resistor settable from 135mA (min) to 1.3A (min). The high-side driver’s on-resistance is 120mΩ (typ) at 125°C ambient temperature. Optional push-pull operation allows driving of cables and fast discharge of load capacitance. The output voltage is monitored and indicated through the DOI_LVL pin for safety applications. ●● Reduces Power and Heat Dissipation • 240mΩ (max) HS RON at TA = 125°C • Accurate Short-Circuit Current Limit • Accurate Internal Current Limiter for Types 1, Type 2, and Type 3 Digital Inputs ●● Enhances System Robustness • “Safe-Demagnetization” for Safe Turn-Off of Unlimited Inductance • 60V Supply Tolerance • Loss of GND Protection • Thermal Shutdown Protection • ±2kV IEC 61000-4-5 Surge Protection • ±20kV IEC 61000-4-2 Air-Gap ESD Protection • ±7kV IEC 61000-4-2 Contact ESD Protection • -40°C to +125°C Ambient Operating Temperature The MAX14914 complies with Type 1, Type 2, or Type 3 input characteristics when configured for DI operation. Applications ●● ●● ●● ●● Industrial Digital Outputs and Inputs Modules Configurable Digital Input/Output Motor Control Safety Systems ●● Reduces BOM Count and PCB Space • Small 4mm x 4mm TQFN Package • Internal Clamps for Fast Inductive Load Turn-Off • On-Chip 5V Regulator ●● Provides Flexibility • Configurable as a Digital Input or a High-Side or Push-Pull Digital Output • Resistor Settable Current Limiting for the High-Side Switch (135mA - 1.3A) • 10V to 40V Operating Supply Range Ordering Information and Functional Diagram appears at end of data sheet. ●● Improves System Speed and Throughput • Propagation Delay of Less Than 2µs Typical DO Application Diagram 24V 40V VL V5 REGIN VDD FAULT DOI_LVL IN MAX14914 DI_EN DOI DOI PP CLIM GND 19-8712; Rev 3; 6/18 PGND DO PDF
Документация на MAX14914 

MAX14914 - High-Side Switch with Settable Current-Limiting, Push-Pull Driver Option and Digital Input Configuration The MAX14914 is a high-side/push-pull driver that operates as both an industrial ...

Дата модификации: 09.08.2019

Размер: 686.7 Кб

19 стр.

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