PCI-IDO-48A Acces Isolated Solid-State Output Card with External Clocking

The Acces PCI-IDO-xxA Series Isolated Solid-State Output Cards with External Clocking are ideal for use in control and instrumentation applications where high-voltage protection is required. Individual channel-to-channel isolation allows every channel to be physically and electrically separated from the others. The opto-isolated outputs use solid-state, P-Channel FET switches, providing a much faster turn-on and turn-off time and higher life expectancy than electro-mechanical relays. User-supplied load voltages can range from 5V to 60V.

The outputs simultaneously apply the commanded state only upon a rising edge at an external input pin (pin 50 on P2, the first connector). An error register indicates if a rising input occurs before output values were updated by software (underflow). The logic on the chip allows the application to read what was written to the latches. Diodes are included across the load for inductive-spike protection.

These cards are especially useful in applications where high common-mode external voltages are present. Isolation is required to guard electronics from transient voltage spikes and offers greater common-mode noise rejection in electronically noisy surroundings containing industrial machinery and inductive loads. These applications include factory automation, energy management, industrial ON/OFF control, security systems, manufacturing test, and process monitoring. In addition to protecting industrial applications from accidental contact with high external voltages, the isolation provided eliminates troublesome ground loops. Connections are available via 50-pin IDC type headers, ribbon cables, and a variety of screw terminal boards. A strain relief bar where the cables exit the card assures that the cables will not interfere with adjacent cards. Standard cables are six feet long but alternate lengths are manufactured options.