AUTOMATION DIRECT D2-08ND3 Discrete Input Module

AUTOMATION DIRECT D2-08ND3 Discrete Input Module

Product Description

Detailed Parameters

1. Input Specifications
   • Channels: 8 isolated digital input channels.
   • Input Type: NPN sinking (current flows into the module).
   • Voltage Range: 10-30VDC (nominal 24VDC).
   • Logic Threshold: ON ≥15VDC; OFF ≤5VDC.
   • Input Current: ~8mA at 24VDC.
   • Response Time: ≤5ms (typical).
2. Electrical Characteristics
   • Isolation: 2,500VAC between channels and between inputs and ground.
   • Filter Time: Configurable (0.5ms, 2ms, 5ms, 10ms) to reduce noise.
3. Power & Compatibility
   • Power Supply: 5VDC from PLC backplane (typical consumption ≤1.5W).
   • PLC Compatibility: DirectLogic DL205 series (e.g., D2-250-1, D2-260).
4. Environmental Parameters
   • Operating Temperature: 0°C to 55°C (32°F to 131°F).
   • Storage Temperature: -20°C to 70°C (-4°F to 158°F).
   • Humidity: 5-95% RH (non-condensing).
   • Vibration Resistance: Complies with IEC 60068-2-6 (10-57Hz, 0.75mm double amplitude).
   • Shock Resistance: Complies with IEC 60068-2-27 (15g, 11ms).
5. Physical Features
   • Dimensions: 110mm (L) × 76mm (W) × 30mm (H).
   • Weight: ~150g.
   • Mounting: DIN rail or panel mount.
   • LED Indicators: Green LED for each channel (illuminated when input is active).

Product Advantages and Features

1. Wide Input Voltage Range
   Accepts 10-30VDC inputs, compatible with various industrial sensors and switches, reducing the need for additional power supplies.
2. Electrical Isolation
   2,500VAC isolation protects the PLC from voltage spikes and noise, enhancing system reliability in harsh environments.
3. Configurable Filter Time
   Adjustable input filtering minimizes false triggering caused by electrical noise, ensuring stable signal detection.
4. High-Speed Response
   ≤5ms response time enables real-time monitoring of fast-changing signals (e.g., proximity sensors).
5. Visual Status Monitoring
   Channel-specific LEDs allow quick verification of input states, simplifying troubleshooting.

Application Areas

1. Factory Automation
   Connects to sensors (e.g., photoelectric, inductive) and switches in production lines to detect part presence, position, or machine status.
2. Process Control
   Monitors limit switches, emergency stops, and valve positions in chemical, food, and water treatment processes.
3. Material Handling
   Detects the position of conveyor belts, lifts, and robotic arms in logistics and warehousing systems.
4. Safety Systems
   Integrates with safety 光幕，door interlocks, and emergency shutdown buttons to ensure personnel safety.
5. Building Automation
   Connects to occupancy sensors, temperature switches, and fire alarms for facility management.

Precautions

1. Wiring Requirements
   • Use shielded cables for inputs to reduce electromagnetic interference.
   • Keep input wiring separate from high-power or AC circuits to avoid cross-talk.
2. Input Voltage
   • Ensure input signals are within the specified 10-30VDC range to prevent module damage.
   • For NPN sensors, connect the sensor’s output to the module input and the sensor’s common to the negative power supply.
3. Filter Configuration
   • Set the filter time based on the application: use shorter times (0.5ms) for fast signals and longer times (10ms) for noisy environments.
4. Environmental Installation
   • Avoid installation in areas exposed to moisture, dust, or extreme temperatures.
   • Provide adequate ventilation if mounting multiple modules in a confined space.
5. Maintenance
   • Inspect LED indicators regularly to verify input status.
   • Clean terminals periodically to prevent corrosion in high-humidity environments.