Original Industrial Spare Part
Allen-Bradley 1771-IAD AC/DC Input Module | PLC-5 120V/125V Digital Interface
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- SKU1771-IAD
- CategoryPLC & Industrial Automation Modules
- BrandAllen-Bradley (Rockwell)
- SupportAvailability, lead time, condition, and shipping coordination
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Allen-Bradley 1771-IAD AC/DC Input Module Overview
The Allen-Bradley 1771-IAD is a high-performance AC/DC input module engineered for PLC-5 automation systems, delivering reliable digital signal acquisition from 120V AC or 125V DC field devices. This industrial-grade interface module provides robust isolation and noise immunity for demanding manufacturing environments.
Technical Specifications
- Input Voltage Range: 120V AC (47-63 Hz) / 125V DC
- Input Points: 16-point digital input configuration
- Input Current: 7mA typical @ 120V AC
- On-State Voltage: 79-132V AC / 79-132V DC
- Off-State Voltage: 0-40V AC / 0-40V DC
- Input Impedance: 17k © nominal
- Isolation: 1500V optical isolation between field and logic
- Response Time: 10ms on-delay, 10ms off-delay (typical)
- Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
- Power Consumption: 150mA @ 5V DC from backplane
- Compatibility: PLC-5 family controllers (1785 series)
Industrial Applications
The 1771-IAD module excels in process control, discrete manufacturing, and facility automation applications requiring AC/DC signal monitoring:
- Motor starter auxiliary contact monitoring
- Limit switch and proximity sensor interfacing
- Push-button and selector switch input acquisition
- Relay contact status monitoring
- Safety interlock and emergency stop circuit integration
- HVAC control system feedback signals
- Conveyor system position detection
Engineering Solutions
This module addresses critical automation challenges through proven design features. The optical isolation architecture protects sensitive PLC logic from electrical noise and ground potential differences common in industrial power distribution systems. Field-replaceable terminal blocks enable rapid maintenance without disturbing wiring, minimizing downtime during module replacement. LED status indicators provide immediate visual diagnostics for each input channel, accelerating troubleshooting procedures.
Product FAQ
Q: Can the 1771-IAD accept both AC and DC signals simultaneously?
A: Yes, the module’s universal input design allows mixed AC and DC signals on different channels within the same module, providing installation flexibility.
Q: What is the maximum wire gauge supported by the terminal blocks?
A: The removable terminal blocks accommodate 12-22 AWG (0.25-2.5mm ²) copper conductors with ring or spade terminals.
Q: Does this module require external power supplies?
A: No external power is required. The module draws operating power from the PLC-5 chassis backplane and field signals provide input power.
Q: Is this module compatible with 1771-IFE analog modules in the same chassis?
A: Yes, the 1771-IAD can be installed in any available slot alongside analog I/O modules without compatibility issues.
Quality Assurance & Warranty
Every 1771-IAD module undergoes comprehensive factory testing including input threshold verification, isolation voltage testing, and thermal cycling validation. All units ship with OEM-equivalent quality standards and include a 12-month warranty covering manufacturing defects and component failures under normal operating conditions.
Related PLC-5 I/O Solutions
| Product | Description | Link |
|---|---|---|
| 1771-IMD/B | 16-Point AC/DC Input Module – Enhanced diagnostics version | View Product |
| 1771-IA2 | AC/DC Input Module – 120V Digital Interface with fast response | View Product |
| 1771-IFE | Analog Input Module – 4-channel differential inputs for PLC-5 | View Product |
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191
| Product Series | PLC-5 (1771) |
|---|---|
| Country of Origin | US |
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