Brightsign 24_input RS232 Interface

(works with 'AMX' controllers and Computers)

24 input RS232 (Serial Interface Board)

Features:

• Small footprint (2.8 x 3.5 inches)
• 24 inputs (No Outputs)
• Terminal blocks for all input connections
• Can connect Directly to the BrightSign (attaching screws ordered separately)
• 5V (BrightSign) or 5 volts external  for standard RS232 connections)
• On board LED's to indicate Power and Processor running.
• RS232 protocol: 38,400 baud, N,8,1

The TX/RX pins can be reversed with simple on board jumper (normal or reverse TX/RX pins).  This feature supports either style of RS232 cable (null modem cable or standard RS232 cable).  The standard RS232 cable has pins 2 and 3 swapped (pin2 of one end connects to pin 3 of the other end).  A 'null modem' cable does not have the pins swapped.

J3 Connector is utilized as a 3.5mm stereo 'RS232' connectors as is found commonly on products.  The same TX/RX pin swap is utilized.

Note: IF ordering this board and you need the 3.5mm stereo connector, email us to specify that you need the 3.5mm and not the DB9 connector.

Operation: (Firmware 3.2)   When an input is grounded (set low), a string is sent out that represents the input (BrightAuthor compatible).  If multiple inputs are activated, successive inputs are reported.  I.E. If input 1 is closed, the "1" is reported, if input 9 closes also, then the new input "9" is reported. When all inputs go high, then a zero is reported (switches have all been released).

The strings are:

• 0  =  "0",13
• 1  =  "1",13 (character "1" followed by a carriage return of chr(13))
• 2  =  "2",13
• 3  =  "3",13
• 4  =  "4",13
• 5  =  "5",13
• 6  =  "6",13
• 7  =  "7",13
• 8  =  "8",13
• 9  =  "9",13
• 10 = "10",13 ("1" followed by "0" followed by a carriage return of chr(13))
• 11 = "11",13
• 12 = "12",13
• 13 = "13",13
• 14 = "14",13
• 15 = "15",13
• 16 = "16",13
• 17 = "17",13
• 18 = "18",13
• 19 = "19",13
• 20 = "20",13
• 21 = "21",13
• 22 = "22",13
• 23 = "23",13
• 24 = "24",13

Contact HMS Electronics if you have need of other than 'strings' to be sent in response to inputs.

Note: J2 (2.1mm jack, external 5 volts) is intended for non-BrightSign applications (AMX or computer interface without 5 volts on pin 4 of the DB9 connector)

RS232_Slides.BRS (BrightScript File)

This script written for the 16 input board in 'ascii' mode.  It will play a slide to match the input number (slides 1 through 16). 

Un-Zip this file to the Root Directory of your SD card and rename the file RS232_Slides.BRS to autorun.brs.  All of the slides should be in the 'Slides' sub-directory.

Last Revised: 03/02/2024