• Provides Keithley products that have a compatible accessory card slot with an IEEE-488 standard parallel interface
• The GPIB interface provides fast, consistent triggering with low trigger latency
• Provides a consistent transfer rate and can send triggers to multiple instruments simultaneously
• Card provides six independently configurable digital input/output lines that can be used to control external digital circuitry
• The digital I/O port is a standard female DB-9 connector

The KTTI-GPIB Communication and Digital I/O Accessory provides Keithley products that have a compatible accessory card slot with an IEEE-488 standard parallel interface. The GPIB interface provides fast, consistent triggering with low trigger latency. It provides a consistent transfer rate and can send triggers to multiple instruments simultaneously. The card provides six independently configurable digital input/output lines that can be used to control external digital circuitry, for example, a handler that is used to perform binning operations. The digital I/O port is a standard female DB-9 connector. You can also use these lines for triggering. The instrument can generate output trigger pulses and detect input trigger pulses.

The KTTI-GPIB digital I/O port provides six independently configurable digital input/output lines.

You can use these lines for digital control by writing a bit pattern to the digital I/O lines. Digital control is used for applications such as providing binning codes to a component handler. Digital control uses the state of the line to determine the action to take.

You can also use these lines for triggering by using the transition of the line state to initiate an action. The instrument can generate output trigger pulses and detect input trigger pulses. Triggering is used for applications such as synchronizing the operations of a measurement instrument with the operations of other instruments.

You cannot configure or directly control the digital I/O lines from the front panel. To configure and control any of the six digital input/output lines, you need to send commands to the KTTI-GPIB over a remote interface. You can use either the SCPI or TSP command set.

See Remote communications interfaces in the instrument reference manual for information about setting up a remote interface and choosing a command set.

The digital I/O port uses a standard female DB-9 connector, located on the rear panel of the KTTI-GPIB. You can connect to the KTTI-GPIB digital I/O using a standard male DB-9 connector. The port provides a connection point to each of the six digital I/O lines and other connections, as shown in the following table.