Allen Bradley 1771-IAD /C 120V AC/DC Input Module

Allen-Bradley 1771-IAD/C 120V AC/DC Input Module

The Allen-Bradley 1771-IAD/C is a 16-point digital input module designed for integration with PLC-5 systems. It facilitates the connection of field devices operating at 120V AC or DC, enabling efficient monitoring and control within industrial automation environments.

Key Features

• Versatile Input Handling: Supports 16 input channels compatible with both AC and DC signals ranging from 79V to 138V.
• Configurable Response Times: Offers selectable input signal delays to accommodate various application requirements.
• Visual Status Indicators: Equipped with LED indicators for each input channel, providing real-time status updates.
• Efficient Power Usage: Consumes 195 mA from the backplane power supply, ensuring energy-efficient operation.
• Robust Design: Built to withstand industrial conditions, featuring static-shielded packaging for enhanced protection against electrical noise.

Technical Specifications

• Number of Inputs: 16
• Input Voltage Range: 79V to 138V AC/DC
• Backplane Current Load: 195 mA at 5V DC
• Signal Delay (Typical):
  • AC On: 5 ms (±3 ms)
  • AC Off: 25 ms (±5 ms)
  • DC On: 3 ms (±0.1 ms) or 10 ms (±1 ms)
  • DC Off: 25 ms (±5 ms)
• Operating Temperature: -40°C to +60°C
• Storage Temperature: -40°C to +85°C
• Relative Humidity: 5% to 95%, non-condensing
• Vibration Resistance: 10 to 500 Hz, 0.03 g²/Hz
• Shock Resistance: 50g half-sine wave, 11 ms duration
• Isolation Voltage: 1500V AC for 60 seconds

Installation and Compatibility

The 1771-IAD/C module is compatible with various 1771 I/O chassis, including models 1771-A1B, A2B, A3B, A3B1, A4B, 1771-AM1, and AM2. It utilizes the 1771-WH wiring arm, facilitating straightforward installation and maintenance without the need to disconnect field wiring.

Safety and Compliance

To ensure safe operation, it is crucial to remove all power before making wiring connections to prevent electrical arcs and potential hazards. Employing static-safe work practices is recommended to protect the module’s integrated circuits and semiconductors from damage.

The Allen-Bradley 1771-IAD/C 120V AC/DC Input Module stands as a reliable solution for interfacing high-voltage field devices with PLC-5 systems, offering flexibility, durability, and ease of integration in diverse industrial applications.