5X00058G01 Emerson HART analog input module

Functional characteristics:

Signal input and conversion: It can receive standard analog signals such as 4-20mA. Through the built-in analog-to-digital conversion circuit (ADC), the continuously changing analog signals are converted into digital signals for processing by the processor of the control system.

HART protocol support: By following the HART protocol, digital signals can be superimposed on 4-20mA analog signals to achieve two-way communication. It can be used for remote query of process variables, setting parameters and diagnosing equipment status, etc. For example, it can obtain configuration setting information and alarm information of intelligent pressure transmitters.

Multi-channel design: It usually has multiple analog input channels, which can simultaneously collect signals from multiple field devices, reducing the number of modules and wiring costs, and improving system integration.

High-precision measurement: It features high measurement accuracy, accurately reflecting the changes in on-site physical quantities, providing reliable data support for control systems, and ensuring the accuracy of industrial process control.

Technical parameters:

Input range: Supports multiple analog input ranges, such as ±10VDC, 0-10VDC, ±5VDC, 0-5VDC, 1-5VDC, 0-20mA, 4-20mA and ±20mA, etc., and can be adapted to different types of sensors and transmitters.

Resolution: Generally, it has a relatively high resolution, such as 24 bits, which can precisely distinguish the subtle changes of analog signals, making the measurement results more accurate.

Sampling rate: It can sample the input signal at a high sampling rate, quickly obtain on-site data, promptly reflect the changes of process variables, and facilitate the control system to respond quickly.

Protection level and operating temperature: Usually, it has a certain protection level, can adapt to harsh industrial environments, has a wide operating temperature range, and can work stably in high and low temperature environments.

Working principle:

Analog signal acquisition: Firstly, the on-site sensors convert the measured non-electrical physical quantities, such as temperature, pressure, and liquid level, into electrical signals. If the electrical signal output by the sensor is not a standard signal, it needs to be converted into a standard analog signal through a transmitter, such as a 4-20mA current signal or a 0-10V voltage signal, etc. The 5X00058G01 module receives these standard analog signals through its input channel to prepare for subsequent processing.

Analog-to-digital conversion (A/D conversion) : The module is equipped with an built-in analog-to-digital conversion circuit (ADC), which converts the received analog signal into a digital signal. For example, if the input is a 0-10V voltage signal, the ADC will convert it to the corresponding digital value at a certain resolution, such as converting it to a 24-bit floating-point data type integer, to facilitate subsequent processing by the module and communication with the control system.

HART protocol communication: The HART protocol employs frequency shift keying (FSK) technology, using a 1200Hz sinusoidal current signal to represent logic 1 and a 2200Hz sinusoidal current signal to represent logic 0, and linearly superpositions these modulated signals onto a 4-20mA analog signal. As a HART slave device, the module can receive commands sent by the master device. By parsing the digital signals superimposed on the analog signals, it acquires instructions from the master device, such as querying parameters and modifying configurations. Meanwhile, the module can also encode the collected analog data and its own status and other information according to the HART protocol, superimpose them in the form of digital signals onto the 4-20mA signal, and send them to the main device to achieve two-way communication.

Signal processing and output: The module processes the converted digital signal, which may include operations such as filtering and linearization correction, to eliminate signal fluctuations and enhance the stability and accuracy of the data. The processed digital signals can be transmitted to the central processing unit (CPU) of the control system for monitoring, calculation, control and other operations, thereby achieving precise control and monitoring of industrial processes.

Application scenarios:

Process industry control: In industries such as petroleum, chemical engineering, power, and metallurgy, it is used to collect process parameters such as temperature, pressure, flow rate, and liquid level, providing real-time data for DCS systems to achieve precise control and monitoring of the production process.

Intelligent instrument connection: It can be connected to various intelligent instruments that support the HART protocol, such as intelligent pressure transmitters and intelligent flowmeters. This not only enables the acquisition of measurement data but also allows for remote configuration and diagnosis of the instruments, thereby enhancing the efficiency of equipment management.

Industrial automation system: As an important component of industrial automation systems, it is used in conjunction with PLCS, industrial control computers and other equipment to build a complete automation control system, achieving the automation and intelligence of industrial production.

Installation and Configuration:

Installation steps

Select the installation location: The module is usually installed on the standard DIN rail inside the control cabinet. A suitable location can be chosen based on the actual situation, such as being close to other related modules or processors, to facilitate wiring and communication. At the same time, heat dissipation and maintenance space should be taken into consideration.

Fixing the module: Insert the module into the DIN rail, ensuring that the spring blades on the module align with the grooves of the rail or adjacent modules. Then, gently press the module in until it is firmly locked onto the rail.

Connect the power supply: According to the module requirements, connect the appropriate power supply, usually a 24V DC power supply. Pay attention to the correct connection of the positive and negative poles to avoid damaging the module due to reverse connection.

Signal wiring: Wire according to the type of sensor on site. If it is a two-wire sensor, an external power supply is required. Connect the signal line and power line of the sensor to the corresponding terminals of the module. If it is a four-wire sensor, its power supply is independent. Connect the signal line to the input channel terminal of the module. For unused channels, their signal terminals can be short-circuited to reduce interference.

Connect the HART communication line: HART signals usually share the same line with analog signals. If communication with the HART controller or other main devices is required, connect it to the corresponding communication terminal of the module and ensure that the loop resistance is within the range of 250-600Ω.

Configuration steps

Set hardware parameters (if any) : Some modules may have hardware setting switches or jumpers for setting input signal types, ranges, and other parameters. According to the actual type of sensor signal used, set them to the corresponding positions.

Configuration software Settings: After connecting the module to the control system, open the corresponding configuration software (such as the configuration software for Emerson DeltaV system). Add modules in the software, specify the address and type of the module, and set the channel parameters of the module, including the input signal type (voltage or current), measurement range, etc.

HART parameter configuration: Connect the HART controller to the module and enter the controller menu to set HART-related parameters for the module, such as device number, unit, output mode (linear/square root), damping time constant, etc. Remote parameter setting and device diagnosis can also be carried out through the HART configuration function in the configuration software.

Calibration module: To ensure measurement accuracy, the module can be calibrated. Standard signal sources can be used to input known analog signals. The zero point and full-scale of the module can be adjusted through a hand controller or configuration software to make its output values correspond to the standard signal.

Download the configuration and test: After completing the above configuration, download the configuration information to the control system. Power on the module, connect the actual signal, observe whether the module works properly, and check the collected data through the configuration software or other monitoring devices to see if it is correct. If there is any abnormality, check the wiring and configuration parameters, and eliminate the fault in time.