Communication Controller

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  • 32-bit ARM9 processor
  • 100Mb Ethernet port; optional WiFi
  • BACnet MS/TP or ASI on System Bus
  • 2 Local Buses support ASI or Modbus Master RTU
  • Works with ASI WebLink & ASI Data Server products
  • USB Device Service Port
  • Local Bus Polling
  • Dial-in, Dial-out (Future)
  • Alarm & Event Notification
  • SD Card expansion slot


The ASIC/3-9500 Multi-port System Interface provides communication access to a network of ASI controllers from a system host computer or modem.  The device runs ASIC/2 or ASIC/3 control sequences but has no physical IO.
The ASIC/3-9500 provides access via USB Device Service port or 100 MB Ethernet, and three RS-485, 1/2 duplex balanced line communication buses. Red and green LEDs indicate receive and transmit status of the System and Local RS-485 communication busses. ASI protocol communication is supported up to 57,600 baud. RS-485 inputs and outputs are protected by 100 mA polyswitches, 24 VAC power input is protected by a 1.35A polyswitch.
The ASIC/3-9500 supports Ethernet TCP/IP and UDP communications via a wired or wireless connection. A Wi-Fi card can be installed in the XBee slot of the ASIC/3-9500, which supports WPA2 and other security protocols. Future releases will support dial-in and dial-out using a dedicated USB modem.
Notify alarm messages can be sent to ASI WebLink for annunciation. Note the device does not currently support forwarding of Notify messages from other ASIC/2 or ASIC/3 controllers on the system bus.
The ASIC/3-9500 controller has three separate RS-485 system and local buses. The system bus is used to network multiple ASIC/3 and ASIC/2 controllers, or optionally the system bus can support BACnet MS/TP.
The ASIC/3-9500 supports polling on the local buses and allows pass-through communication from the Ethernet or USB ports. Alternately either local bus can support Modbus Master RTU. A real time hardware clock enables network time broadcast and synchronizing of time on networks of ASIC/3, ASIC/2 or ASIC/1 controllers.
The ASIC/3-9500 can act as an optional baud rate buffer to allow linking of networks communicating at differing baud rates. A typical application includes a modem link at 9600 baud connected directly to a control system at 19,200 baud. Another typical use case is adding new controllers communicating at up to 19,200 baud to a legacy ASIC/1 controller network running at 1,200 baud.
ASIC/3-9500 functional configuration is held in non-volatile Flash memory that retains program data during power interruption. Configuration of values like System Baud Rate and System Bus Addresses is done using Windows based ASI Visual Expert software.