1756-RM Enhanced redundant module

1、 Main functional features
Redundant functions:
1756-RM is a redundant module in the ControlLogix series, used to implement controller redundancy to improve system reliability and fault tolerance. When the main controller fails, the redundant controller can seamlessly take over the control task, ensuring the continuous operation of the system.
High sensitivity differential protection:
Provide high-sensitivity phase and zero sequence differential protection, which can quickly detect and isolate faults, effectively preventing internal faults in transformers and lines.
Instantaneous overcurrent protection:
Quickly respond to instantaneous overcurrent situations to ensure the safe operation of the system.
Fixed time and reverse time overcurrent protection:
Configure fixed time and reverse time overcurrent protection according to user needs to meet different protection requirements.
Overvoltage and undervoltage protection:
Provide effective overvoltage and undervoltage protection to prevent damage to the system caused by abnormal voltage.
Zero sequence voltage protection:
Monitor zero sequence voltage and provide effective protection against ground faults.
High and low frequency protection:
Monitor the system frequency, provide high and low frequency protection, and ensure stable operation of the system.
Automatic reclosing function:
Equipped with automatic reclosing function, it improves the reliability of system power supply.
Circuit breaker fault protection:
Provide circuit breaker fault protection, quickly identify and isolate faulty circuit breakers.
2、 Physical and Electrical Characteristics
Interface and Connection: Equipped with one (1) LC fiber single-mode connector for connecting two identical controllers. It also requires the use of 1756 RMCx redundant cables to synchronize the operations of redundant controller pairs.
Indicator lights: The module is equipped with status LEDs such as PRI, COM, and OK, which are used to indicate the operational status of system redundancy and module operation.
Compatibility: This module can only be used with the ControlLogix platform to achieve controller redundancy. It is compatible with multiple ControlLogix chassis, power supplies, and redundant power supplies.
Power consumption and heat dissipation: The module has a power consumption of 9 watts and a heat dissipation of 31 BTU per hour.
Physical dimensions and weight: This module is compact in size, weighing approximately 0.29 kilograms or 0.64 pounds, making it easy to install and maintain.
3、 Application scenarios
The 1756-RM enhanced redundancy module is practical for industrial automation and control applications that require high reliability and fault tolerance, such as manufacturing, process control, etc. In these fields, the continuous operation and stability of the system are crucial, and the 1756-RM module can provide effective redundancy protection, ensuring that the system can quickly recover and continue to operate in the face of faults.

The less people know about our company and technology, the more successful we are, “said Ke Ruisi, former President of ABB China and now Executive Vice President of ABB Group, with a smile when talking to reporters about ABB’s World Expo trip.

Although it did not win the title of Global Partner at the Shanghai World Expo like its main competitor Siemens, this electrical giant still won 53 projects at the Shanghai World Expo through open bidding.

For example, the central stage of the World Expo Cultural Center uses ABB frequency converters to precisely control the operation of various motors; The Expo’s rail transit line extensively uses ABB’s complete set of transformers. In addition, the construction of the World Expo supporting facilities and China’s only 500 kV underground substation – Jing’an Center Underground Substation – also uses ABB 550 kV gas insulated switches.

For example, if your home appliances are functioning properly, it means that behind these products, our equipment is very stable, “explained Ke Rui.” Once a problem occurs, users will trace back to us and find us. “As a company that provides technical services to end product manufacturers, we do not directly contact end consumers.

Of course, the World Expo Park is just a microcosm of this company’s fierce competition in China. Against the backdrop of the 2009 financial crisis, ABB increased its investment in China, reaching a proportion of 19%. These investments are mainly used to establish new joint ventures in the world’s largest market.

Railways, smart grids, and new energy are all key development areas that ABB hopes to focus on in China in the future.

Taking advantage of the rapid development of China’s wind energy industry, ABB’s orders in China increased by 125% last year. As the world’s largest supplier of wind turbine electrical components, ABB holds 70% of the equipment products, including transformers, in wind power plants.

The domestic railway is also a huge market that ABB is looking forward to. By 2020, the country plans to build 160000 kilometers of railways, 60% of which will be electrified. ABB has already received good returns in China, with orders increasing by 380% last year compared to 2008.

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