The Measurement Computing PCI-PDISO16 is a PCI bus interface board that combines 16 optically isolated digital inputs with 16 Form C relay outputs. It provides 500 V optical isolation on inputs, eliminating ground loops and electrical noise in industrial control and monitoring environments. Installation is plug-and-play with no manual jumper or switch configuration required.
Technical Specifications
Digital Inputs
• 16 channels, 500 V optically isolated
• Input voltage: up to 28 V AC (50–1000 Hz) or DC
• Non-polarity sensitive AC or DC operation
• Software-enabled low-pass filter: 5 ms time constant (200 Hz cutoff) per channel
• Inputs read as two 8-bit bytes
Relay Outputs
• 16 channels, Form C (SPDT) dry contact electromechanical relays
• Maximum current: 2.25 A @ 120 VAC or 28 VDC resistive
• Contact resistance: 100 mΩ maximum
• Operate time: 20 ms; Release time: 10 ms maximum
• Mechanical life: 10 million operations minimum
• Power-on state: Not energized (Normally Closed to Common)
• Relays controlled and read via two 8-bit ports
Physical & Electrical
• PCI half-card form factor
• Two 50-pin connectors (P2, P3)
• Dielectric isolation: 500 V (1 minute) for inputs
– Key Features
• Plug-and-play installation—no configuration jumpers
• Dry contact relay outputs isolate control circuits from high-voltage loads
• Independent 500 V optical isolation protects against transients and ground loops
• Software-selectable input filtering accommodates both AC and DC signal conditioning
• Form C relay contacts support multiple load configurations
– Typical Applications
• Industrial equipment monitoring and control
• Process automation with isolated signal switching
• Multi-voltage system interfacing (AC and DC)
• Ground isolation in mixed-signal environments
– Compatibility & Integration
The PCI-PDISO16 integrates with Measurement Computing’s InstaCal software for configuration and testing, and supports Universal Library for custom application development. Compatible connector cables include the C50FF-x (50-pin IDC female-to-female) and C50-37F-x (50-pin IDC to 37-pin D-sub adapter) options.
