This section describes the characteristics and operation of all connectors on 4K models.
Power Connector
The power connector for 4K players is rated for 12V @ 5A. The plug is a right-side positive, keyed and locking 4-pin
connector.
DE9 RS-232 Serial
The RS-232 interface is a male DE9 connector. The BrightSign 4K player is a DTE device, similar to a PC. The input to
the chip accepts a range between +25V and -25V, so it is compatible with +12V/-12V signaling.
The baud rate of the RS-232 interface (which is controlled by system software) is 115200, with no parity, 8 data bits, and
1 stop bit. The RS-232 interface supports RTS/CTS hardware flow control, but no software flow control. The maximum
cable length is 50 meters, and the total cable capacitance is 2500pF.
Note: A lower capacitance cable allows you to use cable lengths beyond 50 meters.
The following diagram illustrates the behavior of the TX and RX signal:
9
All information provided in this reference manual applies to products under development. The characteristics and specifications of these products are subject to