HD-4Opto-4R (4 Isolated inputs) & (4 Isolated Outputs/Relays)

for Brightsign Compact HD410, HD810 & HD1010 Video Players

4 Isolated inputs (Buttons) via Opto-Couplers and 4 Isolated outputs (Relays) 

HD-4Opto-4R   ,Opto & Relay I/O Board

Features:

• small footprint (3.2 x 3.0 inches)
• Can mount directly to the DB15 connector or use a DB15 extension cable
• 4 Opto-coupler inputs (some call them solid state relays).  For use with 12 and 24 volts remote activation devices.
• 4 Relays for Isolated Outputs

This board solves the need for using a relay to convert a control signal of 12 or 24 volts DC to a switch closure.  The BrightSign only works with 'switch closure' to 0Volts to activate the GPIO inputs.  The opto-couplers convert the 12 or 24 volt input to a 'switch closure' to operate the GPIO inputs (BTN0-BTN3).  When the voltage is applied to the opto-coupler, the output of the opto-coupler turns on (same as closing a switch to the BrightSign)

There are two terminal blocks for inputs.  One terminal block is used to control the 4 Opto-Couplers (see schematic).  The other terminal block allows for bypass of the opto-couplers so that normally open switches can be used as well.  The opto-couplers are like normally open switches in the output so you can parallel with a switch using the second terminal block as inputs

Opto-Isolator Inputs: There is an 8 pin terminal block marked with +V and 0V for each of the 4 inputs.  The 4 inputs are labeled 0-3 (this corresponds to Btn0-Btn3 of the BrightSign).  This board is utilized when another device applies 12 volts or 24 volts to turn on a remote device (the BrightSign).

Link: Schematic

Updated: October 31, 2011