OptoIso4Chan 4 channel optical isolator board
The OptoIso4Chan 4 channel Optical Isolator board (click to see the manual) is a tiny 1.15" by 1.3" board which buffers up to 4 sets of 5 to 24 volt differential input signals into 3.3 to 5 volt TTL output signals compatible with any product that accepts such TTL signals (such as any of our motor controllers). They are most commonly used for buffering limit switches and other external sensors, to prevent damage to sensitive microcontroller boards.
The two connector options ("MTA-100" and "Screw Terminal") control how you connect all TTL I/O and differential input signals to the board.
- The 'MTA-100' option specifies use of latching Amp MTA-100 connectors, and is recommended for any production system. When the cables are correctly produced, the MTA-100 is vibration resistant, and is easier to use in a production environment.
- The "Screw Terminal" option specifies use of screw terminals for direct wire connection to the board. This is suggested for anyone who is just doing experiments or is connecting to just one or two motors
The output stage of the OptoIso4Chan adapter is designed to be powered off of the target board: That is to say, it should ideally operate directly off of the power and ground associated with the board to which it is connected. Alternatively, it may be powered off of a 3.3 to 5 volt regulated DC supply that is correctly ground referenced to the target board. The TTL output level of the board will match the voltage level of the supply.