ABB NTU-738A Analog Output Termination Unit

ABB NTU-738A Analog Output Termination Unit

Function

Signal conversion and output: Convert digital signals from the control system into analogue signals, such as 4-20mA, 0-10V and other standard analogue signals, in order to drive the actuators, such as regulating valves, inverters and so on, to achieve the control of physical quantities.

Signal Conditioning and Amplification: Condition and amplify the output analogue signals to ensure that the signals have sufficient driving capability and accuracy to meet the requirements of different loads.

Isolation protection: Provide electrical isolation function to prevent the interference signal of field equipment from being strung into the control system, and at the same time, protect the control system from the influence of field equipment failure to improve the reliability and stability of the system.

Diagnosis and alarm: with self-diagnostic function, it can monitor its own working status and the abnormal situation of the output signal in real time. When there is a signal open circuit, short circuit, over range and other faults, it can send out an alarm signal in time to remind the user to carry out the corresponding processing.

Technical parameters

Output signal type: 4-20mA current signal, 0-10V voltage signal, etc. Different application scenarios and equipment may require different types of output signals.

Output accuracy: generally between ±0.1% and ±0.5%, high-precision analogue output terminal unit can achieve higher accuracy, the output accuracy directly affects the control accuracy of the actuator.

Resolution: usually 12 to 16 bits, higher resolution can provide more delicate control effect, to meet the higher requirements of control accuracy occasions.

Load capacity: For current output type, the load resistance can generally support 0-500Ω or a larger range; for voltage output type, the output impedance is lower to ensure that the signal driving ability to drive different types and power of the load equipment.

Response time: generally between milliseconds to seconds, fast response time can make the actuator respond faster to the instructions of the control system and improve the dynamic performance of the system.

Power Requirements: The operating power supply is usually a DC power supply with a voltage range of 18V to 30V DC, and the power consumption of the power supply is low, usually around a few watts to a dozen watts.

Environmental parameters: the operating temperature range is generally - 20 ℃ to + 70 ℃ or so, some models may support a wider temperature range, the relative humidity range is generally 5% to 95% (non-condensing).

Application Areas

Industrial automation control system: In the automated production process of chemical, electric power, metallurgy, pharmaceutical, food and beverage industries, it is used to control a variety of physical quantities, such as temperature, pressure, flow, liquid level, etc.

Process control system: to achieve precise control of various parameters in the production process, to ensure the stability and consistency of product quality.

Building automation system: used to control air conditioning, ventilation, lighting and other equipment to achieve intelligent control of the environment in the building.

Transportation system: used to control motor drive, braking system, air-conditioning system, etc. in the field of rail transport and electric vehicles.

Product Benefits

Flexible Configuration:

Supports a variety of configuration options, which can be configured to different input or output modes according to specific application requirements to meet different control needs.

High performance:

Featuring fast response and high accuracy, it can monitor and control digital signals in real time to ensure the stability and reliability of the system.

Equipped with an on-board 100Mbit/s Ethernet connection, communication between the controller, operator station and engineering workstation is faster and more reliable.

Modular design:

Adopting modular design, it is easy to install, maintain and expand, and can flexibly cope with control systems of different scale and complexity.

Communication interface:

Support common communication interfaces, such as Profibus, Modbus, etc., which can exchange data and communicate with other devices and systems.

Reliable and stable:

As a well-known brand of industrial automation, ABB's products have excellent quality and stability, ensuring stable operation of the equipment for a long time.

Memory & Security:

With 10MB of memory, of which 2MB is for battery backup, to ensure the safety of data and stable operation of the system.

Provides a key lock function to prevent unauthorised downloading of applications and firmware by locking the controller, enhancing the security of the system.

Compact Front Panel Display:

Equipped with a small front panel display that visually shows status and diagnostic information for easy monitoring and maintenance of the unit.