ABB NTU-7B2/A RTD Input Termination Module

ABB NTU-7B2/A RTD Input Termination Module

Basic Information

Name: ABB NTU-7B2/A RTD Input Termination Module is a RTD input termination module manufactured by ABB.

System: Usually part of an industrial automation control system such as ABB's Bailey Infi 90, it is used to receive and process signals from RTD sensors.

Functional features

Signal input and processing

Adapt to a variety of RTD sensors: It can accept input signals from different types and specifications of RTD sensors, such as Pt100, Pt1000, etc., and can accurately measure temperature changes in industrial environments with wide temperature ranges, generally measuring temperatures from - 200℃ to + 850℃ to meet the needs of temperature monitoring in a variety of industrial processes.

High-precision signal conversion: The resistance signal of RTD sensor is converted into high-precision digital signal or standard analogue signal, so as to be processed and analysed by the control system. The conversion accuracy is high, generally up to ±0.1℃ or even higher, to ensure the accuracy and reliability of the temperature measurement, and provide strong support for the precise control of industrial processes.

Linearisation: The non-linear characteristic of RTD is linearised to make the output signal linear with temperature, simplifying the temperature calculation and compensation process in the control system and improving the control accuracy and stability of the system.

Isolation and protection function

Electrical isolation: the input channel and the output channel have good electrical isolation performance, the isolation voltage can be as high as thousands of volts, effectively preventing external interference signals and high-voltage pulses on the control system, to ensure the safe and stable operation of the system, so that it can work reliably in the complex industrial electrical environment.

Over-voltage and over-current protection: Built-in over-voltage and over-current protection circuit, when the input signal exceeds the rated voltage or current range of the module, it can quickly cut off the input channel, protect the internal circuit of the module and the connected equipment from damage, prolong the service life of the equipment, and reduce the maintenance cost of the system.

Diagnostic and alarm functions

Failure self-diagnosis: With powerful failure self-diagnosis function, it can monitor its own working status and the validity of input signals in real time. Once the module failure, sensor failure or signal abnormality is detected, the corresponding alarm signal will be issued immediately and the fault information will be uploaded to the control system, so as to facilitate the maintenance personnel to find and deal with the problem in time, and reduce the system downtime.

Channel status monitoring: The status of each input channel can be monitored individually, displaying the connection status of the channel, whether the signal is normal and other information, so as to facilitate the user to quickly locate the faulty channel and improve the efficiency of troubleshooting.

Technical Parameters

Electrical Parameters

Working voltage: the usual working voltage range of 20V - 30V DC, with a wide power supply adaptability, can to a certain extent to cope with power fluctuations in the industrial field, to ensure that the module works stably.

Power consumption: low power consumption during normal operation, generally between a few watts and a dozen watts, the specific power consumption depends on the number of RTD sensors accessed and the working state, low-power design helps to reduce the overall energy consumption and operating costs of the system.

Performance Parameters

Number of channels: generally have multiple input channels, such as 4-channel, 8-channel and other different specifications to choose from, to meet the needs of different sizes of industrial control systems on the number of temperature monitoring points, the user can be flexibly configured according to the actual application scenarios.

Sampling frequency: high sampling frequency, can be in a short period of time on multiple channels of the signal for rapid sampling and updating, the general sampling frequency can be up to several times per second to dozens of times, to ensure that the temperature can be accurately captured in a timely manner, to meet the real-time requirements of the industrial process of temperature monitoring.

Response time: the response time is short, usually within milliseconds, can quickly respond to temperature changes, so that the control system can adjust the control strategy in a timely manner according to the temperature changes, to ensure the stability of the industrial production process and product quality consistency.

Environmental parameters

Operating temperature range: a wide range of operating temperatures, generally - 20 ℃ to + 70 ℃, some models can even work in more severe temperature environments, such as - 40 ℃ to + 85 ℃, to meet the requirements of a variety of different temperature environments in the industrial field, to ensure that in the high temperature, low temperature and other harsh conditions can still operate normally.

Relative humidity range: the relative humidity range is usually 5% - 95% (non-condensing), which can work stably in humid industrial environments without being affected by humidity changes, ensuring the reliability and service life of the module.

Protection level: With a certain protection level, such as IP20 or higher, it can effectively prevent the intrusion of foreign objects and personnel accidentally contacting the internal circuit, to protect the safety and reliability of the equipment.