1. Key Specifications

• Model: 1762 - IQ16
• Brand: Allen - Bradley (Rockwell Automation)
• Module Type: Digital Input Module
• Channels: 16 isolated digital input channels
• Isolation: 500Vrms isolation between channels and the backplane
• Terminal Block: Integrated screw - type terminals (removable for easy wiring)

2. Electrical Characteristics

• Input Voltage:
  • 24V DC (10–30V DC operating range)
• Logic Levels:
  • Logic High: ≥15V DC
  • Logic Low: ≤5V DC
• Input Current: ~4mA per channel at 24V DC
• Filtering: Built - in 1.2ms digital filter per channel to reduce noise
• Response Time: ~1.2ms (typical, includes filtering)

3. Functional Features

• High - Density Inputs:
  • Monitor up to 16 discrete signals in a single module, ideal for applications with numerous sensors (e.g., conveyor systems, packaging machines).
• Channel Isolation:
  • Galvanic isolation protects against ground loops and electrical noise, enhancing reliability in industrial settings.
• LED Indicators:
  • PWR: Green power indicator
  • FAULT: Red fault indicator (illuminates for module errors)
  • CHx: Individual channel status LEDs (green when input is active)
• Diagnostics:
  • Onboard fault detection for open circuits, short circuits, and overvoltage conditions
  • Fault status reported via LED and controller diagnostics

4. Physical Specifications

• Dimensions:
  • Height: 101.6 mm (4.0 in)
  • Width: 38.1 mm (1.5 in)
  • Depth: 69.9 mm (2.75 in)
• Weight: ~0.18 kg (0.40 lb)
• Environmental Ratings:
  • Operating Temperature: 0°C to 60°C (32°F to 140°F)
  • Storage Temperature: -40°C to 85°C (-40°F to 185°F)
  • Humidity: 5–95% non - condensing
  • Vibration/Shock: Complies with IEC 61131 - 2 standards

5. Compatibility

• Controllers:
  • MicroLogix 1400 (e.g., 1762 - L40BWA, L40BXB)
  • MicroLogix 1100 (e.g., 1762 - L24BWA, L24BXB)
• Communication:
  • Direct integration with the MicroLogix backplane for real - time data transfer
  • No external communication modules required

6. Applications

• Industrial Automation:
  • Monitoring discrete sensors (e.g., limit switches, proximity sensors, photoelectric sensors)
  • Control systems for machinery, conveyors, and material handling equipment
• Safety Systems:
  • Inputs from emergency stop buttons, safety interlocks, and door sensors
• Process Monitoring:
  • Binary state detection (e.g., valve open/closed, motor running/stopped)
• Educational and Training:
  • Labs and training environments for teaching digital input fundamentals

7. Installation and Wiring

• Mounting:
  • DIN - rail or panel mounting in a MicroLogix chassis (e.g., 1762 - A4, 1762 - A8)
• Wiring:
  • Screw - type terminals for secure connections
  • Inputs can be wired as sink or source (configurable via software)
• Cabling:
  • Use shielded cables in noisy environments to reduce electromagnetic interference (EMI)

8. Advantages

• High Channel Density:
  • Maximizes I/O capacity in compact control panels
• Cost - Effective:
  • Lower per - channel cost compared to modules with fewer inputs
• Reliability:
  • Isolated inputs prevent electrical noise and signal interference
  • Industrial - grade design for harsh environments
• Ease of Use:
  • Plug - and - play integration with MicroLogix controllers
  • Clear LED status indicators for quick troubleshooting

9. Limitations

• Fixed Voltage:
  • Designed for 24V DC inputs only; not compatible with other voltage levels (e.g., 120V AC)
• No Analog Support:
  • Purely digital inputs; requires a separate analog module (e.g., 1762 - IF4) for analog signals
• Basic Filtering:
  • Fixed 1.2ms filter may not be suitable for applications requiring adjustable filtering

10. Related Models

• 1762 - OB16: 16 - channel digital output module (complementary for discrete control)
• 1762 - IA8: 8 - channel analog input module (for analog sensor integration)
• 1762 - OF4: 4 - channel analog output module (for analog control signals)