DDC Online direct digital controls
Delta Controls - ORCA  

System Architecture

Date Last Saved: 1/12/2006 2:11:22 PM

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 ORCAview software
"Thin" Client Browser Browsers: Internet Explorer 5.5+ Server: Windows 2000 Pro, or Windows 2000 Server
"Thick" Client Browser
Product Application(s): N.A.
Handheld Interface Devices (HID)
PDA-Based Provides access to network devices and objects allowing operator to make adjustments to operational values and states.
Local Display Panel (LDP) DSM-T0
Zone Based Interfaces (ZBI)
Thermostat with communication port to access local controller/network Service Port on BACstat II (DNS-24) allows network-wide access to all connected Devices and their objects. Comes with occupant override and setpoint adjust. Also available with a blank cover.
Other thermostat types available (without communication ports)
Interface to BAS Networks BACnet/IP on primary controllers (DSC-1616/1212/1280) provides Internet access with no additional hardware Primary network can use IP protocol and is compatible with IT network / Internet
Compatible with the building's IT network? Yes
Protocol(s) BACnet/IP or BACnet over Ethernet
Cabling and Speeds BACnet over Ethernet @ 10 MB
Expansion Capability Expansion is limited by the inherent limits of Ethernet or BACnet/IP.
Additional Information Supports Polling, COV, and BROADCAST
Peer-to-Peer or Polling? Polling
Protocol(s) BACnet-MS/TP
Cabling and Speeds BACnet MS/TP over UTP @ 76.8 kbps (optional speeds are 9.6, 19.2, and 38.4 kbps)
Expansion Capability 99 Secondary Controllers
Additional Information BACnet MS/TP network supports POLLING, COV, and BROADCAST
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) Server with ORCA web
Application Used to provide an operational interface for both building tenants and facility maintenance staff. Provides portal based, graphical or 'Explorer'-style interfaces to users based on their username No fixed limit to the amount of memory available for web pages.
Classification Web Server
Primary Network (BACnet/IP or BACnet/Ethernet)
Intranet and/or Internet
Additional Information
Model (Device) Application
Model (Device) DSM-050
Application The DSM-050 routes network traffic between BACnet IP, BACnet/Ethernet, BACnet MS/TP, and BACnet PTP. The DSM-050 can serve as an external connection to a building via BACnet IP, or can internconnect different BACnet networks inside a building.
Classification Supervisory interface
Primary network
Secondary network
Additional Information Real time clock, Battery Backup, and EIA-232 ports.