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Johnson Controls Metasys System Over CommScope SYSTIMAX CablingDesign and Implementation DocumentDecember 2009
Chapter 1 Executive Summary 4
Chapter 2 JCI Metasys Solution Architecture 5
2.1 Overview 5
2.2 Communication Media 7
2.2.1 Metasys BACnet Family 7
2.2.2 Metasys LON Family 8
2.2.3 Metasys N2 Bus Family 8
Chapter 3 Physical Layer Design 9
3.1 IP over Ethernet Network 9
3.2 BACnet over MS/TP Network 12
3.2.1 FC Bus 13
3.2.2 SA Bus 14
3.2.3 End-of-Line Termination on the MS/TP Bus 16
3.2.4 MS/TP Bus Cable Recommendation from JCI 16
3.2.5 SYSTIMAX Guidelines for FC bus 16
22.214.171.124 FC Chained Branches 17
126.96.36.199 FC Chained Devices 18
3.2.6 SYSTIMAX Guidelines for SA bus 19
188.8.131.52 SA Chained Branches 20
184.108.40.206 SA Chained Devices 21
3.3 LON (LonWorks) Network 22
3.4 N2 Bus Network 23
3.4.1 End-of-Line (EOL) 24
3.4.2 SYSTIMAX Guidelines for N2 bus 24
220.127.116.11 N2 Chained Branches 25
18.104.22.168 N2 Chained Devices 25
22.214.171.124 Calculating the Number of Chained Branches per N2 Segment 26
3.5 Lightning Protection Circuitry 27
3.6 Input/Output Device Guidelines 27
3.6.1 Analog Inputs 27
126.96.36.199 Temperature Sensors 27
188.8.131.52 Powered Sensors 29
3.6.2 Analog Outputs 29
3.6.3 Digital Outputs 30
4.0 References 30
This design and implementation document represents a collaborative development effort between CommScope and Johnson Controls Inc. (JCI). It is in addition to design and installation guidelines from CommScope SYSTIMAX documents and JCI documents.
CommScope/JCI Validated DesignThe CommScope/JCI Validated Design consists of systems and solutions designed, tested, and documented to facilitate faster, more reliable, and more predictable customer deployments.
THE DESIGNS ARE SUBJECT TO CHANGE WITHOUT NOTICE. USERS ARE SOLELY RESPONSIBLE FOR THEIR APPLICATION OF THE DESIGNS. THE DESIGNS DO NOT CONSTITUTE THE TECHNICAL OR OTHER PROFESSIONAL ADVICE OF COMMSCOPE AND JCI, THEIR SUPPLIERS OR PARTNERS. USERS SHOULD CONSULT THEIR OWN TECHNICAL ADVISORS BEFORE IMPLEMENTING THE DESIGNS. RESULTS MAY VARY DEPENDING ON FACTORS NOT TESTED BY COMMSCOPE AND JCI.
CommScope 1100 CommScope Place SE Hickory, North Carolina 28603
Johnson Controls IncBuilding Efficiency507 E. Michigan StreetMilwaukee, WI 53202
Chapter 1 Executive SummaryThis Design and Implementation Document (DID) represents a collaborative effort between CommScope and Johnson Controls Inc. (JCI) in support of the CommScope-JCI relationship. The intent of this document is to provide guidance to the respective sales and technical organizations of each party in the relationship for the design and implementation of a Johnson Controls Building Automation System (BAS) network running over CommScope Intelligent Building Infrastructure Solutions (IBIS).
This DID is an extension of the SYSTIMAX Johnson Controls Metasys Design Guide that was published in 1995 that offered building owners greater flexibility by providing a single structured cabling infrastructure to handle all information traffic -- from voice, data, or video to building management functions such as security systems or heating, ventilation and air conditioning (HVAC).
CommScope IBIS is a modular, flexible cabling infrastructure system that supports voice, data, video and BAS by providing a robust and cost effective connectivity for all of a buildings BAS and communication systems. IBIS utilizes twisted pair and/or fiber optic cabling to provide connectivity in an open architecture environment. In addition, combining CommScope IBIS with CommScope iPatch Intelligent Infrastructure Solution provides the user with control of the physical infrastructure.
CommScope IBIS can support traditional BAS systems based on direct-digital control communication protocols over RS-485 low voltage control networks and newer protocols such as BACnet over MS/TP, LONWorks over FTT-10 or IP over Ethernet networks using various CommScope SYSTIMAX solutions.
There are several standards that describe how BAS can be designed and implemented over structured cabling systems. The standards that supplement this DID are:
1. ANSI/TIA-862 Building Automation Cabling Standard. This standard specifies a generic cabling system for BAS used in commercial buildings that will support a multi-vendor environment. The purpose of this standard is to enable the planning and installation of a structured cabling system for BAS applications used in new or renovated commercial premises. It establishes performance, topology and technical criteria for various cabling system configurations for connecting BAS equipment and devices. It also provides information that may be used for the design of commercial BAS products.
2. ISO/IEC IS 15018 Generic Cabling for Homes. This standard specifies a generic cabling system for applications used in homes and multi-dwelling units. It includes support for CCCB (commands, controls and communications in buildings) applications which encompass lighting controls, building controls, security and fire alarms.
3. CENELEC EN 50173-4 Generic Cabling Systems Part 4: Homes. This standard specifies a generic cabling system for applications used in homes and multi-dwelling units. It is very similar to ISO/IEC IS 15018.
Chapter 2 JCI Metasys Solution Architecture 2.1 OverviewEvery building has to meet several basic requirements such as security, fire-life-safety, ventilation, lighting, health and comfort. Security comes from the need to protect property, content and personnel. Examples of security requirements are identification of vehicles entering and exiting a car park, controlling access to sensitive or secured areas, and precautions against terrorist bomb threats, robberies and burglaries.
Fire safety remains a top priority for high rise office buildings and large shopping malls. The ability to locate and contain the source of a fire rapidly, reduce time to locate missing personnel and facilitate access control is very important. In order to effectively perform these functions, buildings will require fire monitoring and sprinkler systems, lift and access control systems, a public address system and a personnel database.
There is also a need for energy conservation due to dwindling natural resources, and concerns about global warming. This is compounded by a host of regulations especially in Europe. Buildings produce half the carbon dioxide emission and are now more rigorously regulated with new directives. These have resulted in an increasing demand for more efficient and greener buildings. All these require efficient HVAC and lighting control together with an electrical demand monitoring system.
The JCI Metasys system offers data communications and information management via a two level communications architecture (see Figure 1), PC-based workstations, and microprocessor-based controllers and equipment. This results in three levels of BAS equipment plus the endpoint devices:
Level 0 equipment consists of the endpoint devices (i.e. sensors and actuators)
Level 1 equipment is the system and local control units (e.g. NCEs, FECs, LN-series)
Level 2 equipment is the master network or building controllers (e.g. NAEs)
Level 3 equipment is the server (e.g. Application and Data Server [ADS] or Extended Application and Data Server [ADX])
The top level of the communications architecture is a LAN of Metasys controllers and servers and the network software that enable them to communicate. This is based on IEEE 802.3 10/100/1000BASE-T LAN standards. The server (ADS or ADX) is a component of the Metasys system that manages the collection and presentation of large amounts of trend data, event messages, operator transactions, and system configuration data. As Site Director, the server provides secure communication to a network of Network Automation Engines (NAEs), Network Control Engines (NCEs), and Network Integration Engines (NIEs).
The second level of the communications architecture supports BACnet (Building Automation Control Network) protocol, LonTalk protocol, and JCI legacy N2 bus protocol. BACnet was developed by ASHRAE and is now an ISO standard (ISO 16484-5). It is designed to maximize interoperability across many products, systems and vendors in commercial buildings. BACnet devices are connected directly to the IP Ethernet network or to the MS/TP Field Bus.
LonTalk is a standard open protocol developed by Echelon and is now an ISO standard (ISO/IEC/EN 14908 series). It provides sensor and controller connectivity. LonWorks enabled controllers from Johnson Controls or LonMark certified devices from other manufacturers can be integrated into the Metasys system architecture via the LonWorks network.
In a similar fashion, Metasys connects to N2 protocol devices via the N2 bus. The N2 bus is a modified RS-485 network that links Network Control Modules (NCMs), which reside in NCUs, to N2 bus devices such as the Application Specific Controllers (ASCs), Digital Controller Modules (DCMs), Point Multiplex Modules (XBN, XRE, XRL, XRM) and Digital Expansion Modules (XMs). The N2 bus uses a master/slave protocol, in which the master device, the NCM, initiates all communication with the N2 bus devices.
The NAE is a Web-enabled, Ethernet-based supervisory controller that monitors and superv