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 seamless integration into the 1771 I/O chassis, enhancing the functionality of PLC-5 systems. This module is engineered to interface with ON/OFF devices such as limit switches, pushbuttons, and motor starters, facilitating efficient monitoring and control within industrial automation environments.

Key Features

• Input Signal Compatibility: Operates within a voltage range of 79-138V AC or 79-138V DC, accommodating various industrial power standards.
• Input Points: Provides 16 input channels, allowing for extensive connectivity to multiple devices.
• Signal Delay: Features a typical signal delay of 5ms (±3ms) for AC inputs and 3ms (±0.1ms) or 10ms (±1ms) for DC inputs, ensuring prompt response times.
• Off-State Current: Maintains a maximum off-state current of 3mA for AC and 0.8mA for DC, minimizing power consumption during inactive periods.
• Backplane Current Load: Consumes 195mA, ensuring efficient power usage within the system.
• Power Dissipation: Exhibits a maximum power dissipation of 8.8W, contributing to the module’s energy efficiency.
• Thermal Dissipation: Manages thermal output effectively with a dissipation rate of 30.1 BTU/hr.

Installation and Indicators

The 1771-IAD/C module is designed for straightforward installation within the 1771 I/O chassis, which houses the PLC processor. Keying bands are strategically placed between pins 14 and 16 for the upper connector and between pins 10 and 12 for the lower connector, ensuring correct module placement. The front panel features a green module active indicator and 16 red status indicators, providing clear visual feedback on system status and facilitating efficient troubleshooting.

Protective Features

To safeguard system circuits from electrical transients, the module incorporates optoelectrical isolation. Additionally, input filtering capabilities are included to reduce electrical noise, enhancing the reliability and stability of the system.

The Allen-Bradley 1771-IAD/C 120V AC/DC Input Module stands as a robust and reliable component for industrial automation systems, offering extensive input capabilities, efficient performance, and protective features to ensure optimal operation in demanding environments.