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SKU:1771-IN
Allen-Bradley 1771-IN Digital Input Module PLC 5 8 Input
Manufacturer: Allen-Bradley
Product No.: 1771-IN
Product Type: Input Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 450g
Shipping port: Xiamen
Warranty: 12 months
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Description
Product Overview
The Allen-Bradley 1771-IN is a digital AC input module for the PLC 5 series. Weighing approximately 450 g, it provides 8 input channels in a single slot, interfacing with pushbuttons, limit switches, pilot lights, motor starters, and enunciators.
Key Features
8 inputs with 12-28 V AC operating voltage. Backplane current of 80 mA with maximum AC off state current of 2.8 mA. AC signal delay of 18 ms typical for both on and off states. Compatible with 1771-WA wiring arm. Rack mountable design. Electrical optical isolation and filter circuits aid system troubleshooting.
Technical Specifications
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1771-IN |
| Module Type | Digital AC/DC Input Module |
| Number of Inputs | 8 |
| Voltage Category | 24 V AC/DC |
| AC Operating Voltage | 12-28 V |
| DC Operating Voltage | N/A |
| Backplane Current | 80 mA |
| Max AC Off-State Current | 2.8 mA |
| Max DC Off-State Current | N/A |
| Typical AC Signal Delay (On) | 18 (±10) ms |
| Typical AC Signal Delay (Off) | 18 (±10) ms |
| Wiring Arm | 1771-WA |
| Mounting | Rack Mountable |
| Power Dissipation | 0.4 W min, 5.4 W max |
| Weight | Approximately 450 g |
Installation Guide
Mount the 1771-IN (approx. 450 g) in a Bulletin 1771 chassis, occupying one slot. Connect field devices to the 8 inputs using the 1771-WA wiring arm. Verify AC input voltage stays within 12-28 V for reliable on state operation. Keep off state current below 2.8 mA to prevent false triggering. Use the configuration plug to select fault mode behavior for output failure.
Engineering Advantages
Single slot design saves chassis space in PLC 5 systems. Lightweight 450 g construction reduces rack strain. Electrical optical isolation protects the processor from field transients. Front panel indicator lights show ON/OFF status of every input for quick diagnostics. Fault mode selection via configuration plug allows last state or reset behavior. Compatible with all current Allen-Bradley programmable controllers.
Frequently Asked Questions
Q1: How many inputs does the 1771-IN provide?
A1: It provides 8 digital AC input channels in a single slot.
Q2: What is the AC operating voltage range?
A2: It accepts 12-28 V AC for on state operation.
Q3: Does this module support DC input voltage?
A3: No, the 1771-IN is an AC only input module with no DC operating voltage.
Additional Specifications
- Black
Scalar (V/f)
Vector
AC-powered
Buying Guide
- Confirm the exact model, part number, and specifications before ordering.
- Ensure compatibility with your current machinery or control systems.
- Reach out via sale@etowonauto.com or +8617859788089 for technical assistance.
- Review delivery options, lead times, and shipping requirements.
- Follow manufacturer instructions and best practices during installation.
Shipping And Return
In-stock items are typically dispatched the same business day. For products not currently in stock, dispatch times may vary based on availability. International shipping is available, and shipping costs are calculated according to destination, weight, and carrier selection.
Returns are accepted within 30 days of receipt, provided items are unused and in original condition. Return shipping costs are the responsibility of the customer. Please contact us before returning any item to receive return authorization.
For more details, please review our Shipping & Return Policy.

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