The NI cFP-DI-330 is a digital input module for Compact FieldPoint systems that acquires eight optically isolated digital input channels in industrial and harsh environments. Universal inputs accept voltage levels from 5 V TTL to 250 VDC/VAC, supporting sourcing, sinking, and power-sensing configurations. The module delivers 1 kHz all-channel update rates with built-in LED status indicators and onboard diagnostics for streamlined deployment and troubleshooting.
Technical Specifications
• Input Channels: 8 optically isolated digital inputs
• Input Voltage Range: 5 VDC TTL to 250 VDC; 3 V to 250 VAC (50/60 Hz); 4 to 250 VDC universal range
• Input Current Limiting: 1.5 mA per channel
• On-State Voltage Threshold (DC): Minimum 4 V across INa and INb terminals; voltages 1 V to 4 V indeterminate; below 1 V registers OFF
• OFF-State Leakage Current: Connected devices must not exceed 350 µA to prevent false triggering
• Update Rate: 1 kHz all-channel
• Bank Isolation: 2,300 Vrms transient overvoltage protection; 250 Vrms CAT II continuous channel-to-ground isolation
• Power Consumption: 200 mW from network module
– Key Features
• Optical isolation on all eight input channels eliminates ground loop noise and provides transient surge protection
• Integrated overvoltage protection safeguards against voltage spikes
• Channel LED indicators display real-time input state for immediate status verification
• Onboard diagnostics reduce installation and maintenance overhead
• Universal input architecture accommodates mixed voltage and signal types in single module
• Double insulation rated for 250 Vrms operational use
– Typical Applications
• Proximity and limit switch monitoring
• Push button and thermostat input acquisition
• Relay closure detection
• Power circuit status sensing
• TTL device interfacing
– Compatibility & Integration
The cFP-DI-330 integrates directly into NI Compact FieldPoint systems. No channel-to-channel isolation is provided; bank-level isolation handles inter-module protection.
