Excellent PLC
Module Introduction
The Allen Bradley 1794-IB16D Digital Input Module is a 16-point DC input device from the FLEX I/O family, engineered to deliver compact, flexible, and high-density I/O connectivity for distributed control systems. Designed for efficiency and scalability, the 1794-IB16D provides reliable digital signal acquisition from field sensors such as proximity switches, push buttons, and photoelectric devices.
Built for modern automation systems, this module not only offers diagnostic feedback for input states but also includes integrated fault detection to simplify troubleshooting and improve operational uptime.
Technical Data Sheet
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley / Rockwell Automation |
| Product Series | FLEX I/O 1794 Series |
| Product Type | 16-Point Digital Input Module |
| Input Type | DC Sinking Inputs |
| Number of Inputs | 16 Channels |
| Input Voltage Range | 10–31.2 VDC (nominal 24 VDC) |
| Current Draw per Input | 8 mA typical at 24 VDC |
| Input Delay (ON/OFF) | 0.25 ms (typical) |
| Isolation Voltage | 50 V Continuous, Basic Insulation |
| Input Signal Status Indicators | LED per input point |
| Module Diagnostics | Open-wire detection, short-circuit indication |
| Backplane Current | 70 mA at 5 V DC |
| Operating Temperature | 0°C to 55°C (32°F to 131°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Humidity | 5–95% non-condensing |
| Dimensions (H × W × D) | 94 mm × 94 mm × 69 mm (3.7 in × 3.7 in × 2.7 in) |
| Weight | 0.16 kg (0.35 lb) |
| Mounting Type | DIN Rail with 1794 Terminal Base |
| Certifications | UL, CE, C-Tick, CSA, Class I Div 2 |
Practical Use in Automation Systems
The 1794-IB16D is ideal for decentralized I/O architectures where space efficiency and wiring reduction are critical. It is commonly implemented in packaging lines, automotive systems, and process skids. Its diagnostic feedback simplifies maintenance by detecting open wires and shorted input conditions — a crucial feature in systems demanding high reliability and uptime.
When connected through adapters such as 1794-AENT (EtherNet/IP) or 1794-ACN15 (ControlNet), this module provides seamless communication with CompactLogix, ControlLogix, and other Rockwell controllers.
Distinctive Engineering Benefits
-
High-Density Input Design: 16 inputs per module reduce overall panel space requirements.
-
Integrated Diagnostics: Built-in fault detection enhances troubleshooting and predictive maintenance.
-
LED Indication: Clear visual input status display for quick system checks.
-
Flexible Mounting: Compatible with multiple terminal base units for configuration flexibility.
-
Field Proven Reliability: Optimized for vibration and temperature variations in industrial settings.
