System Description - PCB Layout
Fusion4 MSC-L Part No.: 4418309_Rev09
3- 24 Installation & Operation Manual
Honeywell
3.6.1 PCB Details
3.6.1.1 CAN-HMI-MSC
3.6.1.1.1 Functions
The CAN-HMI-MSC board is used as the basic Human Machine
Interface (HMI) for the MSC-L. The board supports various
communication interfaces, Ex-i interfaces, and the display interface
control.
Following are the functions of the CAN-HMI-MSC board.
Function Description
Display interface control Displays a 8” WVGA color display in the MSC-L lid.
RTC with battery backup Is used for the date and time stamping of the transaction data.
External backup battery is connected to the RTC to retain the real-time
information, even when the main power of the MSC-L is turned off.
Transaction storage memory Is the external, non-volatile memory for storage of the transaction details.
Display image memory Stores video data and it is interfaced to the Field Programmable Gate
Array (FPGA).
Power failure memory management Is the non-volatile memory for storage of measured values as a protec-
tion against the power failure.
HHC IR interface Is the HHC IR interface for the Fusion4 IR Controller.
Ambient light sensor Is the device used for sensing the ambient light condition. It is sensitive
to visible light and has peak sensitivity at 570 nm.
RS-COM (2-wire or 4-wire) The RS-485 serial communication block is used by the FlexConn micro-
processor to communicate with external devices using an RS-485 com-
pliant physical layer. It can be configured for a 2-wire half-duplex or a 4-
wire full-duplex RS-485 communication.
ETHERNET The Ethernet communication block is used for allowing the FlexConn
microprocessor to communicate with the external devices using an
Ethernet-compliant physical layer.
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