1771-IAD Allen-Bradley Digital Input Module
$123.00
$320.00
Description
Allen-Bradley 1771-IAD Digital AC/DC Input Module
The Allen-Bradley 1771-IAD, also cataloged as the 1771-IAD Digital AC/DC Input Module, operates as a dedicated hardware component for discrete signal acquisition within PLC-5 control systems. It receives 120 VAC / 125 VDC field input signals and transfers status data through the 1771 chassis backplane interface.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-IAD |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 1.00 lbs |
| Power Consumption | Backplane current 195 mA at 5 VDC |
| Series | 1771 Series / PLC-5 |
| Product Type | Digital AC/DC Input Modules |
| Number of Inputs | 16 inputs |
| Input Type | Digital AC/DC |
| Input Voltage | 79-138 VAC / 79-138 VDC |
| Voltage Category | 120 VAC / 125 VDC |
| Frequency | 50/60 Hz |
| Typical AC Signal Delay Off | 25 +/- 5 ms |
| Typical DC Signal Delay Off | 25 +/- 5 ms |
| Typical AC Signal Delay On | 5 +/- 3 ms |
| Typical DC Signal Delay On | 3 +/- 0.1 ms or 10 +/- 1 ms |
| Maximum AC Off-State Current | 2.8 mA |
| Compatible Chassis | 1771-A1B, A2B, A3B, A3B1, A4B, 1771-AM1, 1771-AM2 |
EtherNet/IP and PLC Backplane Integration
The 1771-IAD is designed for PLC-5 rack-based control architectures and communicates input status through the 1771 backplane. The module supports deterministic PLC I/O scanning by transferring discrete field conditions into the controller data table.
The Allen-Bradley 1771 architecture provides modular I/O density scaling through chassis-based expansion. Correct system operation requires compatibility between module type, rack slot configuration, and PLC-5 processor firmware requirements. The module uses the 1771 backplane electrical interface and does not provide independent network communication.
Frequently Asked Questions
Q: How many field input points are available on the 1771-IAD module?
A: The 1771-IAD provides 16 digital AC/DC input channels for 120 VAC / 125 VDC class signals.
Q: What is the backplane current requirement of the 1771-IAD?
A: The module requires 195 mA from the 5 VDC backplane supply.
Q: Can the 1771-IAD be installed in any PLC chassis?
A: No. Installation requires a compatible Allen-Bradley 1771 series chassis with the correct backplane configuration.
Field Installation Guidelines
Install the 1771-IAD into the designated 1771 chassis slot with the module keying and connector alignment verified before insertion. Ensure the field wiring arm is correctly seated and terminal connections are tightened according to the installation documentation.
Separate AC/DC field signal wiring from high-voltage power conductors where possible to reduce electrical noise coupling. Verify input voltage levels before connection and confirm grounding practices for the PLC enclosure and control panel.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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