The Allen-Bradley 1771-IAD/C is a 16-point digital input module designed for the PLC-5 series, capable of handling both 120V AC and 125V DC input signals. This module serves as a reliable interface between field devices and the PLC system, facilitating efficient monitoring and control in industrial automation applications.
Key Features
- Dual Voltage Compatibility: Supports both 120V AC and 125V DC input signals, offering flexibility in various industrial settings.
- 16 Input Channels: Provides 16 discrete input points for connecting multiple field devices.
- Adjustable Signal Delay: Features selectable input filtering to suppress contact bounce and electrical noise, ensuring accurate signal processing.
- LED Status Indicators: Equipped with individual LED indicators for each input channel, allowing for quick status monitoring.
- Backplane Compatibility: Designed for installation in 1771 I/O chassis, including models 1771-A1B, A2B, A3B, A3B1, A4B, 1771-AM1, and AM2.
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Catalog Number: 1771-IAD/C
- Module Type: Digital AC/DC Input Module
- Number of Inputs: 16
- Voltage Category: 120V AC/DC
- Operating Voltage Range: 79–138V AC or DC
- Backplane Current: 195 mA at 5V
- Power Dissipation: Maximum 8.8 W, Minimum 1.0 W
- Signal Delay (On to Off): 25 ms (±5 ms)
- Signal Delay (Off to On): Selectable:
- AC: 5 ms (±3 ms) or 20 ms (±5 ms)
- DC: 3 ms (±0.1 ms) or 10 ms (±1 ms)
- Isolation Voltage: Tested at 2500V DC for 1 second per UL508 and CSA C22.2 No. 142 standards
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Dimensions: 3.5 x 6.5 x 2.0 inches (89 x 165 x 51 mm)
- Wiring Arm: Compatible with 1771-WH wiring arm
Applications
The 1771-IAD/C module is ideal for interfacing with discrete devices such as pushbuttons, limit switches, and auxiliary contacts. Its dual voltage compatibility and robust design make it suitable for various industrial automation tasks, including process control and machine automation.
Installation and Compatibility
This module is designed for easy integration into existing PLC-5 systems. It is compatible with multiple 1771 I/O chassis models and utilizes the 1771-WH wiring arm for straightforward field wiring connections. The module’s design allows for removal or insertion without disconnecting field wires, facilitating maintenance and system upgrades.
In summary, the Allen-Bradley 1771-IAD/C 16-Point 120V AC/DC Input Module offers a reliable and flexible solution for monitoring and controlling discrete input signals in industrial automation environments. Its compatibility with both AC and DC voltages, along with its robust feature set, ensures efficient and accurate performance in a wide range of applications.
