ROKU_HD_HYBRID3 GPIO BOARD 
(Roku_HD_8x8 Board)
Use with HD410, HD810 & HD1010
Features:
Rev2 Firmware: (03/March/2011)
Note: Baud Rate of 19200 effective on product shipped after 01/19/2011
The modes of operations are selected by the options switch and are as follows:
Option 1: Cycle Diagnostic: Lights (outputs) are turned on one at a time and this cycle repeats until the option switch is opened
Option 2 Selects 'Don't expect serial input prefix of decimal 170. (Compatible with previous Firmware for this board)
Option 3 Discard 'Carriage Return' (Decimal 13) Note: The Brightsign may output a 'Carriage Return' at the end of a string (byte or bytes)
Option 4: N/A (3 positions switch used)
Note: The suppression of the 'Carriage Return' and 'Line feed' as well is a program feature of setting up the Serial Port on the Brightsign.
Operation:
All 8 inputs go to the Compact DB15 I/O connections (Input0 to Btn0 and so forth).
The Outputs to drive lamps or relays are controlled by the RS232 serial port from the Brightsign unit.
Note: No data is sent to the BrightSign using the RS232 port.
The new 'Set Port' Protocol for controlling the lights is: 170, 'Port Byte'. Send this two byte sequence out using the 'comma separated bytes' serial command in BrightAuthor.
At any time, the Brightsign sends out the 'Set Port String', then the lamps will light according to the bit pattern of the 'Port Byte'. I.E. Bit 0 of the byte, will turn on Ouput-0.
Example: To just set the Outputs, Send 170 (decimal), then the byte that represents the bits of the output (see table below)
Just add the decimal numbers together to get the bits set that you want. Setting all bits on is 255d (decimal). Setting bits 0 and 7 on is 128+1 or 129 decimal
| Note: External Supply Voltage: An External Power Supply is needed to power the loads on the output connector. Do not connect any loads that have their own power that exceeds the power as applied to the board using the 'Ext. Power Connector'. Doing so may result in damage to the board. I.E. Suppose that 12 volts is supplied to this board and you have a relay board with it's own power of 24Volts DC that powers the relays. The 24VDC will feed back into the board via the foldback diodes. Note: Foldback diodes are required for inductive loads such as relays or small motors. |
Note: The output driver chip (ULN2803A) is basically a switch to ground (0 volts). The output driver chip is suitable as an 'enable' to external devices requiring a switch closure to ground (zero volts). Connect the ground of the external device to the 0V terminal of the input terminal block, and connect the 'activate' wire of the external device to the appropriate output terminal.
Updated: March 16, 2011 (Baud changed from 9600 to 19,200) and new BrightAuthor 'strings'.