BACnet Programmable Controller

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  • XBee pad supports optional WiFi module
  • Direct Ethernet connectivity
  • 16 Universal inputs (multiplex up to 64)
  • 16 Form A relays + 8 analog outputs
  • 3xRS-485 ports; 2 local, 1 system bus
  • Battery-backed hardware clock
  • Rugged stainless steel enclosure
  • USB Host and USB service ports
  • Modbus RTU Master and BACnet MS/TP interfaces


BACnet Controller

The ASIC/3-9540 controller features a BACnet MS/TP interface that can network to ASIC/1-6100 VAV Controllers or other BACnet devices supervised by a BACnet web server front end. A BACnet system bus can be enabled at the same time as a Modbus RTU Master local bus and an ASI legacy protocol sub-network on the second local bus.

16 Universal inputs are provided which can be multiplexed up to 64 total inputs. Control of mechanical equipment and systems is driven through 16 Form A relay outputs and 8 analog outputs. The onboard Ethernet port provides front end access to data and changing controller configurations. A USB service port provides extremely fast communication with ASI configuration and networking software. The USB Host provides rapid on-site loading of firmware upgrades.

Control sequence design and configuration is done using ASI’s intuitive Visual Expert graphical configuration software. A comprehensive library of objects enables quick configuration with real-time data viewable in the software to help speed-up commissioning. Configuration data can be uploaded to any instance of ASI Controls Visual Expert configuration software, either through plug-in connectivity on the jobsite or remotely over a network connection.

A Modbus RTU Master interface can be selected for either or both of the local buses to control and monitor Modbus slave devices including variable frequency drives (VFD’s), smart power meters, digital communicating thermostats, Lighting controllers and panels, pressure monitors, etc. Installing an ASI Controls Energy Management System with VFD’s and other Modbus-enabled energy saving devices can reduce building energy consumption and lower operating costs.

A native demand control algorithm drives automated setpoint adjustments and equipment duty-cycling or deactivation when the load is forecast to exceed the maximum kW demand control setpoint. Utility companies are increasingly providing Demand Response incentives to pay building owners and operators who can shed load when required to help the utility balance load to meet customer requirements. The Optimum Start sequence works with historical and current data to minimize energy used pre-conditioning facilities for occupancy.

ASI Controls features intuitive drag and drop configuration and programming of control sequences for HVAC Control, Energy Management, Building Automation and similar applications. The ASIC/3-9540 controller is hardware compatible with legacy ASIC/2 Programmable controllers. The controller provides energy management and control of a wide range of building systems including air handlers, chillers, cooling towers, boilers, pumps, lighting, etc. Applications range from autonomous control of retail stores, branch banks, and telephone company buildings to networked control of very large buildings. Uses flash memory for persistent program and data storage. Isolated switching power supply for AC or DC operation. Battery-backed real-time clock for true stand-alone or supervisory capability. Onboard data trending and alarm/event initiation. Advanced Schedule and calendar features allow special time schedules for flexible occupancy settings such as educational facilities, or for applications like retail networks who schedule special hours around holidays.