Do you need a smart converter? You will get a clear idea of the HART modem and its technology. You will come to know about the signal modulation of HART.
It is essential to know the benefits of the HART modem. The full form of HART is Highway Accessible Remote Transducer. We need to know the procedure for local linking and remote linking. We have to understand the additional items of the HART modem along with the priority of HART protocol.
Let us talk about the HART modem.
What is A HART Modem?
HART Modem represents a gadget supporting online conversation through the normal current loop of 4-20 mA. It takes the help of the HART protocol or the Highway Addressable Remote Transducer. There is detection and adjustment of the online signal. It permits the transfer of information between the field device and the master.
HART Modem: Brief Description of Product
The HART modem belongs to GTL and has USB connectivity. A personal computer is a compatible device. The data fax modem has 2 ports and can send a message to the manufacturer’s HART meter.
The examples are EH, Rosemont, Cologne, Siemens, Chu and Yokogawa. You will discover the integration of the industrial item in the intelligent converter. There is a particular design for the vibration and temperature.
The electromagnetic fields match. We observe different types of interfaces. The manufacturer and brand are GLTL. The product dimensions are 7 x 5 x 2 cm, and the HART modem weighs 240.4 g.
The user can run the device on Windows 7 and Windows XP. An individual does not need a battery to run it. Data fax is a type of modem. USB is a form of connector. The product weight is 240g.
Complete Guide on HART Technology
Half-duplex is a communication guideline of HART. The host has the power to send a message using the field transmitter. The host gets a message from a field transmitter. We have a particular line of communication through 4-20 mA.
In a particular moment, only one entity is supposed to send a message. HART protocol uses a frequency shift keying rule. It overlaps the online signal for messaging. There are two ways of simultaneous communication in the HART protocol.
They are digital signals and analogue signals of 4- 20mA. There is communication of the 4-20mA signal with the basic measured value. It happens due to the instrument in the field.
Exploring The Signal Modulation of HART
To change the online information, Frequency Shift Keying is used in the HART protocol. The goal is to change online data to a normal analogue signal. It permits communication between the host and the field device. A frequency of 1200 HZ is represented by binary 1.
A frequency of 2200 HZ is represented by 0 in binary. The frequency of 1200 HZ has a brief frequency and a lengthy period. 2200 HZ is a lengthy frequency and a brief period. The current loop is 4-20 mA, and we find an overlay in the modulation.
It can assist in sending extra data to the device. It supports the information on configuration and repair. You will also get the basic measurement.
Advantages of HART Modem
The primary advantages of HART modems include matching of the present infrastructure, improved repair and observation, regulation and setting from remote areas, decrease in the expense of repairing, high standard of security, high level of precision, simple way of repair, and output at a low cost. Now. Let us explore them.
- Matching of the present infrastructure: The wiring of 4-20 mA is used in HART modems. It removes the requirement of expenses.
- Improved repairing and observation: They have the power to repair, which helps in pointing out major problems with the spread of information online. It decreases the loss from converting analog to the digital format.
- Regulation and setting from remote areas: There is a modification in the criteria. You will find the calibration and settings of the device from a remote location. It decreases the time when it is not working.
- High standard of security: The security improves with the access from remote areas and repairing is accomplished at an advanced level.
- High level of precision: The smart transmitters give precise measurement, and you will get this information online.
- Low cost: It helps in decreasing cabling. It controls the cost of repairing and it increases the level of precision. There is a cheap outcome for HART modems.
How to Do Remote Linking and Local Linking in HART Modem
HART modem linking is made in remote and local areas. It permits talking with gadgets supported by HART. The computer and HART modems are the two things. There is direct linking through local linking. On the other hand remote linking takes the help of network. An example of remote linking is the Ethernet.
Local Linking:
- This links with the field device of HART. A connection is established with the origin of 24V.
- We need to link with a resistor of 240 ohms. This is between a field gadget and a source of 24V.
- There should be a link between the computer with the HART modem.
- Here you will find that the software is working.
- The Field Information Manager is working. You can link with the new adapters of HART with your field gadget.
Remote Linking:
- You have to put the online serial port at the end of the customer.
- Create a setting of online serial port in the form of a customer. There is an online serial port located far away.
- Ethernet is the platform for spreading the information of the customer, which is directed towards the server.
- The offline serial port receives the data from the server. This serial port is a part of our HART modem.
- The current loop signal is 4-20 mA and this signal is changed using HART modem. The data is a major factor in current loop signal.
- The field device has a HART transducer, which creates an extraction in the signal. Then the online data flows easily.
Conclusion
In my opinion, the HART modem is quite useful as it has a wide range of benefits. You can do local and remote linking of this modem. The signal modulation helps in sending extra data. Therefore, we have a clear idea of the Highway Accessible Remote Transducer modem.
Frequently Asked Questions
Ans. HART permits signals of two types, and they are digital and analogue. They are sent using a connection in 2 wires. The information is forwarded through the control system towards the field gadget. You will discover the configuration of the field device.
Ans. Online HART signal has frequencies of 1200 HZ and 2200 HZ. 1 bit is the signal of 1200 HZ and bit 0 is 2200 HZ. You can shift the data. It has been found that the frequecy have sine waves, which overlap over the signal cables of DC analog.
Ans: The demerits of HART protocol consist of the online signal within a HART transmission runs at a slow pace. There is a multidrop system where you cannot reach analog signal. One system is regulated properly.
