Pre-Installation Planning - Electrical Considerations

CE Conformity

Electrical noise produces undesirable effects in measurements and control circuits.

Digital equipment is especially sensitive to the effects of electrical noise. You should use the following methods to reduce these effects:

•Supplementary bonding of the controller enclosure to a local ground, using a No. 12 (4 mm2) copper conductor, is recommended. This may help minimize electrical noise and transients that may adversely affect the system.

•Separate external wiring - group connecting wires into bundles (see Table 8) and route the individual bundles through separate conduits or metal trays.

•Use shielded twisted pair cables for all Analog I/O, Process Variable, RTD, Thermocouple, dc millivolt, low level signal, 4-20 mA, Digital I/O, and computer interface circuits. Ground shields as described in the section Input/Output Installation and Wiring.

•Use suppression devices for additional noise protection. You may want to add suppression devices at the external source. Appropriate suppression devices are commercially available.

•Refer to document 51-52-05-01How to Apply Digital Instrumentation in Severe Electrical Noise Environments for additional installation guidance.

Grouping Wires for Routing

Wires that carry relatively high electrical energy can produce unwanted noise in wires that transmit signals of relatively low energy, particularly when they are placed parallel in long wiring runs. Collect and bundle wires of similar type, and route the bundle separate from bundles of other types. Table 8 provides suggested guidelines for grouping wires.

 

Table 8 - Guidelines for Grouping Wires

 

 

Wire Group

Wire Functions

 

 

High voltage

• AC Line power wiring

(>50 Vdc/Vac)

• Earth ground wiring

 

• Control relay output wiring

 

• Line voltage alarm wiring

 

 

Signal

Analog signal wire, such as:

(<15 Vdc)

• Input signal wire (thermocouple, 4 mA to 20 mA, etc.)

 

• 4-20 mA output signal wiring

 

• Slidewire feedback circuit wiring

 

Communications

 

 

Low voltage

• Low voltage alarm relay output wiring

(<50 Vdc/Vac)

• Low voltage wiring to solid state type control circuits

 

 

44

HC900 Hybrid Controller Installation and User Guide

Revision 5

 

 

9/03

Page 53 Page 55
Page 54
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Honeywell HC900 CE Conformity, Grouping Wires for Routing, Guidelines for Grouping Wires, High voltage, 50 Vdc/Vac, 15 Vdc
Page 53 Page 55

HC900 specifications

The Honeywell HC900 is a robust control solution designed to meet the demands of process industries. This flexible and powerful platform provides a comprehensive set of features tailored for process control and monitoring applications. The HC900 is particularly suited for batch control, continuous processes, and discrete applications, making it a versatile choice for a variety of industries, including oil and gas, chemicals, and electricity generation.

One of the main features of the HC900 is its modular design. This allows users to customize their control systems by selecting from a range of I/O modules, communication options, and control strategies. The system supports both analog and digital inputs and outputs, enabling seamless integration with existing infrastructures. Additionally, the modular approach enhances scalability, allowing users to expand their systems as their needs evolve.

The HC900 is equipped with advanced control technologies, including adaptive control, multivariable control, and real-time data logging. These capabilities facilitate fine-tuned control over complex processes, improving efficiency and reducing waste. The system can manage multiple process loops simultaneously, providing operators with a holistic view of their operations.

Another significant characteristic of the HC900 is its intuitive user interface. The system features a graphical display that allows operators to monitor system performance easily and make adjustments quickly. This user-friendly design minimizes training requirements and encourages efficient operation across different experience levels.

Furthermore, the HC900 incorporates sophisticated data management tools. With built-in logging and reporting functions, users can track process variables and generate comprehensive reports for analysis and regulatory compliance. This data-centric approach fosters informed decision-making and enhances overall operational effectiveness.

From a communication standpoint, the HC900 supports a variety of protocols, making it compatible with many industry-standard devices. This interoperability ensures that users can integrate the HC900 into their existing systems without hassle, streamlining migration and upgrade processes.

Additionally, the HC900 is built with reliability in mind. Its rugged design ensures durability, capable of withstanding harsh environments while maintaining consistent performance.

In summary, the Honeywell HC900 stands out as a powerful and flexible control solution, equipped with modular design, advanced control technologies, and user-friendly interfaces that cater to the diverse needs of process industries. With its comprehensive data management capabilities and robust communications options, the HC900 is an excellent choice for organizations striving for efficiency and reliability.
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