NI PCI-6527 48-Bit Isolated Digital I/O

The NI PCI-6527 is a 48-bit isolated digital I/O interface for PCI bus systems, delivering individually programmable input and output channels with high-voltage isolation for demanding industrial applications. Built for environments where electrical transients and ground loops pose risk, the card provides 1000 Vrms transient overvoltage protection and 500 Vrms isolation rating to safeguard both host system and connected equipment. Signal integrity is preserved through superior noise immunity in electrically noisy settings.

– Technical Specifications

Digital I/O Architecture
• 48 channels, individually configurable as input or output
• Input voltage: Logic Low 0–3 V, Logic High 5–24 V
• Output voltage: Logic Low 2.4 V @ 1 mA
• Output current drive: 1 mA sinking or sourcing per channel
• Switching speed: Typically 100 µs
• Input scan rate: Up to 5 kHz per channel
• Output update rate: Up to 5 kHz per channel

Electrical & Isolation
• Isolation breakdown voltage: 1000 Vrms channel-to-earth ground
• Surge protection: 2500 Vrms
• Power consumption: 5 V @ 500 mA from PCI bus

Host Interface & Connectors
• PCI Local Bus, 32-bit, 33 MHz specification
• 68-pin shielded SCSI-type connector for digital I/O

– Key Features

• Per-channel programmable direction for flexible application design
• Transient overvoltage protection isolates control logic from field-level hazards
• Standard PCI form factor: full-height, half-length card
• Operating temperature range: 0–55 °C; storage to 70 °C
• Wide input threshold acceptance (0–24 V) accommodates diverse signal sources

– Typical Applications

• Industrial process control and monitoring
• Machine automation and safety interlocks
• Data acquisition from isolated sensor networks
• Equipment protection in high-noise electrical environments

– Compatibility & Integration

Windows 7/8/10 (32-bit and 64-bit); LabVIEW Real-Time and Linux via specific driver versions. Requires NI-DAQmx driver software. Fully compatible with LabVIEW, LabWindows/CVI, Measurement Studio for Visual Studio, C/C++, and Python via NI-DAQmx Python API.