Product Details
Product Description
The Allen Bradley 1794-ACNR is a ControlNet redundant media adapter designed for the FLEX I/O 1794 series. It provides dual-channel communication capability, ensuring reliable data transfer and redundancy in distributed control systems. With DIN rail mounting, robust isolation, and support for ControlNet protocol version 1.25, this adapter is engineered for demanding industrial environments.
Technical Specifications
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Manufacturer Allen Bradley
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Product Line FLEX I/O 1794
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Product Type ControlNet Redundant Media Adapter
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Part Number 1794-ACNR
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Weight 0.81 lbs (0.37 kg)
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Input Voltage Range 19.2–31.2 V DC
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Nominal Voltage 24 V DC
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Power Consumption 400 mA max from external 24 V supply
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Power Dissipation 4.6 W max @ 19.2 V DC
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Thermal Dissipation 15.7 BTU/hr @ 19.2 V DC
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FlexBus Output Current 640 mA max
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Inrush Current 23 A for 2 ms
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Isolation Voltage 850 V DC continuous (basic insulation type)
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Communication Protocol ControlNet V1.25
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Data Transfer Speed 5 Mbps
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Communication Ports Two BNC connectors (Comm A and Comm B)
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Indicators Comm A (red/green), Comm B (red/green), I/O status (red/green)
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Mounting DIN rail
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Operating Temperature –20 °C to +55 °C (–4 °F to +131 °F)
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Shock Resistance IEC 60068-2-27, 30 g (unpackaged)
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Vibration Resistance IEC 60068-2-6, 5 g @ 10–500 Hz
Application Scenarios
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Redundant communication in distributed FLEX I/O systems
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Industrial automation requiring high reliability and fault tolerance
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Control systems with long-distance communication up to 50 ft
FAQ
Q: What protocol version does the 1794-ACNR support? A: It supports ControlNet protocol version 1.25.
Q: How many communication ports are available? A: Two BNC ports for redundant media connections.
Q: What is the maximum FlexBus output current? A: 640 mA maximum.
Comparable Models
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1794-ACNR: Redundant ControlNet adapter (this model)
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1794-ACN15: Standard ControlNet adapter without redundancy
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1794-ACNR15: Enhanced redundant adapter with extended features
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Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.