ALLEN BRADLEY 1771-DB/B

Payment: T/T and Western Union
product origin: America
shipping port: XIAMEN
Lead Time: 3-5 days

Send Inquiry

Category Module Brand: Allen Bradley

Allen-Bradley 1771-DB/B: 16-Channel Digital Input Module for PLC-5/PLC-2 Industrial Automation

Product Introduction

The Allen-Bradley 1771-DB/B is a reliable 16-channel digital input module from the legacy 1771 I/O series, engineered for seamless integration with Allen-Bradley PLC-5 and PLC-2 programmable logic controllers. As a core component of discrete control systems, it converts 24V DC digital signals from sensors, limit switches, and pushbuttons into data readable by the PLC—enabling real-time monitoring of machine status and process conditions in industrial environments.

Designed for industrial durability, this module features a rugged metal housing that withstands harsh factory conditions, including vibration and electrical interference. It supports sinking input logic (current flows into the module), making it compatible with a wide range of industrial sensors and switches. A key advantage is its hot-swappable design (when used with compatible chassis), allowing replacement without powering down the entire system—minimizing downtime for maintenance or upgrades.

Ideal for legacy system retrofits and existing installations, the 1771-DB/B maintains compatibility with Allen-Bradley’s classic PLC platforms while delivering consistent performance. It includes LED status indicators for each channel, enabling quick troubleshooting of signal issues. With its proven reliability and straightforward wiring, it remains a trusted choice for discrete control applications in manufacturing, automotive, and material handling sectors.

Product Data Attributes

Attribute Category	Specifications
Model Information	Model: Allen-Bradley 1771-DB/B Product Type: Digital Input Module Series: 1771 I/O (Legacy) Channel Count: 16 discrete input channels
Electrical Specifications	Input Voltage: 24 V DC (10–30 V DC operating range) Input Logic: Sinking (current-in) Input Current: 7 mA (at 24 V DC, on-state) Response Time: <1 ms (typical) Input Resistance: 3.3 kΩ (nominal)
Compatibility	PLC Compatibility: Allen-Bradley PLC-5, PLC-2 controllers Chassis Compatibility: 1771 I/O chassis (e.g., 1771-A4B, 1771-A1B) Backplane Compatibility: 1771 I/O backplane (5V DC logic power)
Mechanical Specifications	Dimensions (H×W×D): 127 mm × 36 mm × 229 mm (5 in × 1.42 in × 9 in) Net Weight: ~0.5 kg (1.1 lbs) Mounting: 1771 I/O chassis slot mount Housing Material: Metal (ruggedized for industrial use)
Environmental Ratings	Operating Temperature: 0°C to +60°C Storage Temperature: -40°C to +85°C Humidity: 5–95% RH (non-condensing) Vibration Resistance: 10–500 Hz, 1 g peak (IEC 68-2-6)
Functionality & Indicators	Status Indicators: 16 LED indicators (1 per channel, green = on-state) Wiring: Screw terminal connections (removable terminal block optional) Hot-Swappable: Yes (with compatible 1771 chassis)
Safety & Compliance	Certifications: CE, UL, CSA Standards: IEC 61131-2, NEMA ICS 6, EN 61010-1 Isolation: Input-to-backplane isolation (opto-isolated)
Typical Applications	Machine status monitoring, Sensor signal acquisition, Limit switch input, Pushbutton control, Discrete process sensing Industries: Manufacturing, Automotive, Material Handling, Legacy System Retrofits, Industrial Control Panels