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Johnson Controls - Metasys M Series  

System Architecture

Date Last Saved: 5/25/2004 8:15:20 AM

This section distinguishes between Operator Interfaces and Field Interfaces to the BAS. The Operator Interface refers to the main 'front-end' method for accessing and operating the BAS. The Field Interfaces typically access the BAS from the controller-level and have limited functionality, and may include HID, LDP, and ZBI as described below. This section describes the devices only; OI functionality is generally covered in the Software, while Field Interface functionality is detailed further in the individual Controllers
Operator Interfaces (OI)
Dedicated Operator Workstation (OWS)
Dedicated PC(s) with proprietary workstation software
PC with Metasys M3 or Metasys M5 software. M-Series software consists of many individual packages depending on level of functionality and features desired. The M5 Workstation is the flagship product in the Metasys line and can communicate with both the Proprietary and BACnet protocols. The M5 also has OPC capability, which is required by many of the data analysis, plotting, and diagnostic utilities provided as options by Johnson Controls. The M3 Worstation is a simpler BACnet-only version of the M5, with less software utility options and typically used in smaller installations.
"Thin" Client Browser
"Thick" Client Browser Netscape Navigator 4.61+ or Internet Explorer 4.0+. Web acess requires that the network have M-Web Server software running on a PC on the IP network.
Product Application(s): N.A.
Handheld Interface Devices (HID)
PDA-Based A Palm-OS handheld can be used with Johnson Controls software and specialized cable to perform commissioning and diagnostic procedures on VMA (VAV/terminal unit) controllers.
Proprietary Local Display Panels (see below) can be used as handheld devices or can be mounted.
Local Display Panel (LDP) The following LDPs are available as options for the indicated equipment: Local Display Terminal (LDT): The LDT is a 4x20 character LCD display with LED backlight. The LDT also has a red LED alarm light on the faceplate. The LDT mounts on the N30 and is not recommended to be used as a handheld device due to electrostatic concerns. The Network Terminal (NT) is an field-based operator interface that has a touch-sensitive screen and is used to make control adjustments at any NCM, including overrides; changes to schedules, loop parameters, set points, and alarm limits; view trends; and perform status checks. The NT can also be permanently mounted. DT-9100 Display (for DX-9100 and DX-9200):Optional zone-mounted, handheld, or controller-mounted display panel with LED display of viewing trend data/plots as well as other more typical functions. Can display up to 96 points of data. The DT-9100 also increases the scheduling capability of the DX-Series controllers by extending the weekly schedule to a yearly schedule with holidays and exceptions.
Zone Based Interfaces (ZBI)
Thermostat with communication port to access local controller/network A variety of thermostats are available with small displays. Consult Johnson Controls for latest offerings. The Zone Terminal (ZT) is a smaller field-based operator interface that allows for simple controller monitoring and adjustment. It can be used as a handheld device or can be field-mounted to a specific controller. The ZT uses five-digit LCD display and shows 3 values simultaneously. A red LED shows points in alarm, and a battery-backed clock allows for time scheduling. ZT cannot be used with the DX-9100. It connects to the AHU controller directly, and to the UNT and VAV controllers through the zone sensor or specialized cable.
Other thermostat types available (without communication ports)
Zone sensor
Zone sensor w/ occupant override
Zone sensor w/ setpoint adjustment
Zone sensor w/ occupancy sensor
Interface to BAS Networks Primary network (N1 Bus) uses Proprietary /IP protocol or BACnet/IP protocal and is compatible with IT network/Internet
Compatible with the building's IT network? Yes with the cooperation of the facilities' IT department
Protocol(s) Proprietary/IP (the NCM supervisory interface uses Proprietary/IP as a primary network protocol.) *BACnet/IP (the N30 supervisory interface uses BACnet/IP as a primary network protocol.)
Cabling and Speeds Standard IP Cabling @ 10 Mbps
Expansion Capability Up to 50 NCMs or up to 30 N30 devices can be connected to a primary network.
Additional Information While the primary network can carry both N1 Proprietary communications from the NCM and BACnet-based communications from the N30, these devices cannot communicatae directly with each other. An M5 woprkstation is required to facilitate this communication. Typical new installations use only one of these 2 protocols.
Peer-to-Peer or Polling? Polling
Protocol(s) Proprietary
Cabling and Speeds UTP @ 9600 kbps
Expansion Capability Up to 128 SCUs per N2 Segment
Additional Information
Includes a listing of available Gateways, Routers and other devices that provide additional communications flexibility into and out of the BAS. Repeaters, bridges, standard modems and the like are typically not included here. Note: If in use by the BAS, the Internet/building IT Network is extremely open and non-proprietary. If a vendor uses the IT Network, CI devices such as IP routers and hubs can be purchased from third parties.
Model (Device) Application
Model (Device) PC running M-Web software
Application A workstation or dedicated PC running M-Web Server sorftware is required to provide web-based access to the Metasys system.
Classification Web Server
between
Primary Network (Proprietary or BACnet)
and
Thin Clients running Internet Explorer or Netscape Navigator.
Additional Information
Model (Device) Application
Model (Device) Metasys Integrator(s)
Application Gateways with hardware and software for integration of Metasys system with a large number of third party vendors and devices. Contact Johnson Controls for a full list of products currently supported.
Classification Gateway
between
Integrators connect either to N1 (IP) or N2 (Proprietary). Specific connection depends on the type of Integrator being used.
and
3rd-party systems
Additional Information
Model (Device) Application
Model (Device) Metasys Telephone Interface (MTI)
Application Metasys Telephone Interface allows building tenants to temporarily override lights and comfort parameters in their immediate area while working after hours or on weekends. MTI is password enabled. Up to 4 overrides can be processed simultaneously.
Classification Modem
between
Users with touch-tone phone
and
Metasys
Additional Information
Model (Device) Application
Model (Device) Metapage
Application MetaPage is a paging interface that allows for auto-dial paging of building operators when critical alarm events occur. Can be configured to send alarms to various workers scheduled over 3 shifts, and supports both alpha and numeric pagers.
Classification Modem
between
Metasys
and
Building Operators
Additional Information
Model (Device) Application
Model (Device) CablePRO and CVTPRO
Application The CablePRO and CVTPRO are electrical interfaces that must be used to get signals from a PC or Palm handheld to the Zone Bus (and into the controller).
Classification Modem
between
Serial EIA-232
and
Zone Bus
Additional Information