NI PCIe-6509 Digital I/O Device

The NI PCIe-6509 is a high-density digital I/O device for PCI Express systems, delivering 96 bidirectional channels of 3.3 V/5 V TTL/CMOS digital I/O. Built on dual DAQ-STC3 ASICs, it provides 24 mA per-channel drive current for direct control of industrial actuators, solid-state relays, and external logic circuits. Input protection extends to ±20 V on up to two pins, while programmable features including power-up states, digital filtering, change detection, and watchdog timers enable reliable operation in demanding automation and machine control environments.

– Technical Specifications

• Digital I/O Channels: 96 bidirectional
• Logic Compatibility: 3.3 V/5 V TTL/CMOS
• Output Drive Current: 24 mA per channel (sink or source)
• Input Voltage Range: 0 V to 5 V
• Output Voltage Range: -0.5 V to 5.5 V
• Absolute Maximum Voltage (I/O lines): -0.5 V to +5.5 V with respect to GND
• Input Thresholds: Low 0.8 V, High 2.0 V
• Input Protection: ±20 V on up to two pins
• Maximum Data Rate: Software timed; rates depend on computer, OS, and code
• Bus Power Draw: 575 mA typical / 700 mA peak on +3.3 VDC; 20 mA typical / 90 mA peak on +12 VDC
• +5 V Output at I/O Connector: +4.0 V to +5.25 V; 1 A maximum
• Dimensions: 14.2 cm × 10.4 cm (5.6 in. × 4.1 in.)

– Key Features

• Programmable input filters eliminate glitches and spikes; debounce digital switches and relays
• Configurable power-up states for glitch-free, safe startup with industrial actuators
• Digital watchdog timers detect computer or application errors and recover to a user-defined safe state
• Change detection reports rising and falling edges on DIO lines
• Software-configurable pull-up/pull-down resistors on a per-port basis
• Optional disk drive power connector increases +5 V supply capability when installed

– Typical Applications

Industrial automation, machine control, process monitoring, and data acquisition systems requiring high-channel-count digital control with integrated safety and filtering.

– Compatibility & Integration

Requires NI-DAQmx driver software. Compatible with LabVIEW, LabWindows/CVI, Measurement Studio, Visual Basic, ANSI C/C++, .NET Framework, and Measurement Hardware Driver Development Kit. Host interface: PCI Express. I/O connector: 100-pin female 0.050 series SCSI.