TTL-I/O cards switch external circuits from the PC or can record switching processes.
TTL conductions work bidirectional, can be used as input and output and can record data or control external devices. The inputs and outputs of the cards are controlled by software.
TTL cards are used to switch digital circuits or to record switching processes.
TTL-I/O:Digital input/output that are characterized by predefined voltages for switching on and off. Therefore they may only be used for controlling a electronic circuit.TTL Signal:A binary signal, that defines '1' as 5V and '0' as 0V. Other voltages (except specified inaccuracies) are not allowed to be used.