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ABB TP854 base plate

From: | Author:Wang | Time :2025-07-11 | 9 visit: | Share:



ABB TP854 base plate

Product Overview

AO845A is an analog output module specially designed by ABB for industrial automation scenarios, belonging to the S800 I/O family. This module is mainly used to convert the digital signals inside the controller into analog signals, in order to drive actuators or other analog devices. It plays a key role in industrial automation and control systems, and can achieve precise control of various industrial processes. It supports single redundancy or redundant applications and has 8 unipolar analog output channels, which can meet the diverse control needs of complex industrial systems. At the same time, the module has a periodic self diagnostic function, which can monitor the real-time operation status of the module and ensure the stable and reliable operation of the system.


Brand background

ABB, as a globally renowned technology leader in the field of electrical and automation, has a long history of over 140 years. The company operates globally and has over 105000 employees. ABB has always focused on technological innovation, deeply integrating engineering experience with digital technology to provide advanced solutions for various industries, helping customers achieve efficient operations, improve energy efficiency and production efficiency, and promote sustainable development in various industries. In the field of industrial automation, ABB relies on its profound technical accumulation and rich project experience, and its products are widely used in various industries, trusted by global customers.


Basic information

Product model: TP854 (or TP854A, TP854B)

Product Code: 3BSE025349R1

Product Description: A base plate designed specifically for CI854, CI854A, and CI854B, belonging to the Modular Termination-Unit.

Package: Yes CI854K01(3BSE025961R1)、CI854AK01(3BSE030220R1)、CI854BK01(3BSE069449R1) The components of the kit.


Size and weight

Product net depth/length: 216mm

Product net height: 49.5mm

Product net width: 72mm

Net weight of product: 0.234kg


Core functions

Analog signal output: It can output 4... 20 mA standard analog signals, which are used to drive devices that require continuous adjustment such as regulating valves, frequency converters, and motor controllers, achieving precise control of industrial processes.

HART communication: Supports HART pass through communication function, facilitating device status monitoring and remote parameter configuration, and improving system management efficiency. Only point-to-point communication is supported, and the channel used for HART communication requires an output filter to be enabled.

Self diagnostic function: Periodically perform self diagnosis, monitor and report multiple faults in real time. External channel errors, such as low output circuit supply voltage, output current less than the set value, and set value greater than 1 mA (open circuit), will be reported (only reported on active channels); Internal channel error, reported when the output circuit cannot provide the correct current value, the redundant centering module will be instructed by the module bus master device to enter an error state; Module errors, including output transistor errors, short circuits, checksum errors, internal power supply errors, status link errors, watchdog or erroneous OSP behavior, will be reported.


Working principle

The control system sends digital signals to the AO845A module, and the digital to analog converter (DAC) inside the module converts the received digital signals into analog signals. Afterwards, the analog signal is output to the external control device through the analog output channel. For example, in a temperature control system, the PLC calculates a control signal based on the difference between the current temperature value and the set temperature, and sends it in digital form to the AO845A module. The AO845A module converts it into a corresponding 4-20 mA analog current signal output to control the working power of the heater and adjust the temperature.


Key advantages

High reliability: Equipped with comprehensive self diagnostic functions and short-circuit protection mechanisms, it can promptly detect and handle faults, ensuring stable operation in complex industrial environments. Through various international certifications such as CE, UL, etc., it meets strict electrical safety standards and can adapt to the safety requirements of different regions and industries.

Flexible compatibility: Supports single redundancy or redundant applications, can be used in conjunction with multiple MTU (module terminal units), suitable for industrial automation systems of different architectures, and has strong universality and compatibility.

Convenient communication: With the help of HART communication technology, seamless integration with various devices can be achieved, facilitating real-time data exchange and device diagnosis, facilitating remote management and maintenance, reducing manual intervention, and improving overall system operation and maintenance efficiency.

Precise control: With a resolution of 12 bits and a maximum error as low as 0.1%, it can accurately output analog signals, meeting the extremely high requirements for control accuracy in industrial application scenarios.


Precautions

Installation aspect: During installation, relevant electrical specifications and operation guidelines should be followed to ensure the correct installation of modules and correct circuit connections, in order to prevent malfunctions caused by improper installation. The module size is compact, and the installation space should be reasonably planned to ensure good heat dissipation.

Signal configuration: It is necessary to correctly configure the signal mode (such as active or passive mode) according to the actual application scenario. For equipment operating in different explosion-proof areas, corresponding configuration rules should be followed.

Wiring requirements: Use shielded cables for process connections, especially when using HART communication, to reduce electromagnetic interference and ensure the stability and accuracy of signal transmission.

Address setting: For devices with PROFIBUS PA, the bus address should be checked or configured before startup to ensure that the address is within the valid range (0... 125) and unique within the network segment.

Maintenance: Regularly check the working status of the module, observe the front LED indicator lights, and promptly troubleshoot and handle any abnormalities. When the system malfunctions, targeted maintenance can be carried out based on the diagnostic information of the module.


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