RTI-835

The RTI-834/RTI-835 are high performance multifunction analog and digital I/O boards that plug into expansion slots in the IBM AT or compatible microcomputers. Their functions include analog input, analog output (RTI-835 only), digital I/O and time related I/O functions.

The boards provide data acquisition capability for 16 single-ended or 8 differential analog inputs with optional expansion to 32 single-ended or 16 differential analog inputs. The analog-to-digital converter has 12-bit resolution and is a sampling ADC (built-in SHA). The RTI-834H and RTI-835H are high level input boards and have software programmable gains of 1, 2, 4 and 8. The RTI-834L and RTI-835L are low level input boards and have software programmable gains of 1, 10, 100 and 500. The RTI-835H and RTI-835L provide two analog output channels each using a 12-bit D/A converter. The boards also provide 16 bits of digital I/O, which are bit configurable as input or output, and four external counter/timer channels. These counter/ timer channels can be used for event counting, frequency measurements or pulse outputs.

There are no jumpers on the RTI-834/RTI-835. The following configuration options are software-selectable: analog input voltage range, analog-to-digital converter coding, single-ended/ differential inputs, analog output voltage ranges, interrupt level and DMA channel. The base address of the board is selected using an on-hand DIP switch, which helps avoid address conflicts at power up.