The PCS architecture should include a secure network interface to the Local Area Network (LAN). Authorized LAN users should have selected ability to monitor the process remotely. No control or engineering capability should be accessible from any remote interface (i.e., interfaces that are not within the scope of the PCS should be view-only).
III.5.Interfaces with Other Systems III.5.1.Intelligent Process Interfaces
{Describe in this section any PCS process interfaces beyond “standard” simple electrical I/O (e.g., Analog Inputs, Analog Outputs, Discrete Inputs, Discrete Outputs, Pulse and Binary Coded Decimal I/O). Examples of intelligent process interfaces include Barcode Equipment, Weigh Cells, Analytical Instruments, and Variable Frequency Drives. More sophisticated I/O collection mechanisms, such as Fieldbus or DeviceNet networks, should also be described.
Include in these descriptions the extent of monitoring and/or coordination for each interface. For example, characterize the extent of remote maintenance capabilities to be provided.}
{Describe in this section any messaging to/from the PCS and other process control systems. For example, key process status indicators may be transmitted to central monitoring systems, and/or to controllers for upstream, downstream, and service/utility processes. Include in these descriptions the anticipated communication mechanism (I/O, TCP/IP, etc.) and the degree of interaction between the systems.}
{Describe in this section communications and coordination with other site computerized systems, such as Laboratory Information Management Systems (LIMS), Manufacturing Execution Systems (MES), and Enterprise Resource Planning (ERP) systems. Include in these descriptions the anticipated communication mechanism (I/O, TCP/IP, etc.) and the degree of interaction between the systems.>
III.5.4.Shared Resources
III.6.Environment III.6.1.Layout
The following draft floor plan(s) indicates the physical location of the process and related equipment:
{Insert preliminary facility floor plan(s) for the process area(s), control locations, and server rooms}
It is anticipated that the
equipment will be distributed within this facility. The following considerations and principles should guide the physical design and location of PCS equipment:
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Equipment locations must balance wiring costs, access convenience, cleaning requirements, throughway obstruction, and consumption of valuable production and/or personnel space.
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All equipment must be readily accessible for use (if applicable), cleaning, and maintenance.
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Equipment that requires routine and/or frequent access should consider user access ergonomics.
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The ability to receive, install, and remove equipment from the site should be considered.
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Ready access to system manuals and appropriate procedures should be provided.
III.6.2.Physical Conditions
The following environmental conditions should be considered in determining appropriate equipment installation locations:
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Area
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Classification(s)
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Description
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The following is a brief characterization of area classifications. For more detailed descriptions and equipment requirements, refer to appropriate industrial standards.
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Classification
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Description
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NEMA4
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Refers to the minimum protection provided by enclosures located in the area. Type 4 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water; and to be undamaged by the formation of ice on the enclosure.
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NEMA4X
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Refers to the minimum protection provided by enclosures located in the area. Type 4X enclosures are intended for indoor and outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure.
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NEMA12
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Refers to the minimum protection provided by enclosures located in the area. Type 12 enclosures are intended for indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping noncorrosive liquids.
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NEC Class I
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Class I locations are defined by the National Electric Code as those locations in which flammable gas or vapor may be present in the air in quantities sufficient to produce explosive or ignitable mixtures. All NEC classes may be subdivided as Division 1 (Normally Hazardous) or Division 2 (Not Normally Hazardous).
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NEC Class II
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Class II locations are defined by the National Electric Code as those locations that are hazardous due to the presence of combustible dusts. All NEC classes may be subdivided as Division 1 (Normally Hazardous) or Division 2 (Not Normally Hazardous).
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US FS 209D
Class 100
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United States Federal Standard for clean room air classification characterized by airborne particulates (> 5 microns) less than 100 particles per cubic foot (equivalent to US FS 209E class M 3.5 and to ISO EN 14644-1 class 5).
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US FS 209D
Class 1000
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United States Federal Standard for clean room air classification characterized by airborne particulates (> 5 microns) less than 1,000 particles per cubic foot (equivalent to US FS 209E class M 4.5 and to ISO EN 14644-1 class 6).
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US FS 209D
Class 10,000
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United States Federal Standard for clean room air classification characterized by airborne particulates (> 5 microns) less than 10,000 particles per cubic foot (equivalent to US FS 209E class M 5.5 and to ISO EN 14644-1 class 7).
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US FS 209D
Class 100,000
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United States Federal Standard for clean room air classification characterized by airborne particulates (> 5 microns) less than 100,000 particles per cubic foot (equivalent to US FS 209E class M 6.5 and to ISO EN 14644-1 class 8).
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