The Measurement Computing PCI-PDISO8 is an 8-channel digital I/O board for PCI bus systems, delivering optically isolated inputs and relay outputs rated for high-voltage industrial environments. It isolates the computer from external signals up to 500 V (functional isolation), protecting sensitive electronics while enabling reliable control and monitoring in demanding automation and process control applications.
Technical Specifications
Digital Inputs
• 8 channels, optically isolated, non-polarized
• Voltage range: 5 V to 28 V DC or ±24 V; 5 V to 28 V AC (50 Hz to 1000 Hz) or ±24 V AC (50 Hz to 1 kHz)
• Input high level: > 5 V minimum; input low level: < 2.5 V maximum
• Isolation: 500 V functional
• Input resistance: 1.6 kΩ min / 455 Ω minimum
• Programmable low-pass filter: 5 ms time constant (200 Hz), software-selectable per channel, disabled at power-up
• Response time: 20 µs (unfiltered) or 5 ms (filtered)
Relay Outputs
• 8 channels: 5 Form C (SPDT) relays (Relay 0–4) and 3 Form A (SPST, NO) relays (Relay 5–7)
• Contact rating: 6 A @ 30 VAC or 28 VDC resistive; 3 A @ 120 VAC or 28 VDC resistive
• Contact resistance: 100 mΩ max
• Operate time: 20 ms max; release time: 10 ms max
• Mechanical life: 10 million operations minimum
• Dielectric isolation: Functional
• Power-on reset state: Relays de-energized, NC contacts to common
– Key Features
• Fully plug-and-play PCI installation
• 37-pin D connector with standard C37FF interface cables
• Operating temperature: 0 °C to 70 °C; storage: –40 °C to 100 °C
• Humidity tolerance: 0% to 90% non-condensing
– Compatibility & Integration
InstaCal software handles installation, calibration, and testing. Universal Library programming libraries support Windows XP SP2, Vista, and Windows 7. LabVIEW drivers included.
