1.Product Overview
The Allen-Bradley 1794-ACNR15 FLEX I/O™ ControlNet Adapter enables deterministic, high-speed communication for distributed I/O systems. Designed as the central node for Rockwell’s FLEX platform, this adapter interfaces up to 30 FLEX I/O modules via local backplane with ControlNet™ (CNET) connectivity at 5Mbps. Its robust metal housing (–40°C to +70°C) features IP20 protection (IP65 with kit) and withstands 5g vibration per IEC 60068-2-6. Supporting dual-channel media redundancy, it achieves ≤2ms cycle times for real-time control. Integrated network diagnostics provide LED status for node health, channel errors, and module faults. Compatible with Studio 5000® for plug-and-play configuration.
2.Critical Technical Specifications
Core performance parameters:
- Network Protocol: ControlNet (CIP™) conforming to IEC 61158
- Data Rate: 5Mbps with RG-6/U coaxial (BNC connectors)
- Node Capacity: 30 FLEX modules per adapter (max. 252 I/O points)
- Power Supply: 24V DC ±10% (2.5A max for modules)
- Backplane Current: 750mA @ 5V DC (logic), 1.2A @ 24V DC (field)
- Synchronization: ±500µs coordinated sampling
- Redundancy: Dual ports for trunk-line redundancy (auto-switch <50ms)
- Certifications: UL 61010-1, ATEX II 3G, CE, cULus
- EMC: EN 61000-6-2/4 (10V/m RF immunity)
3.Targeted Applications
Deterministic distributed control:
- Automotive Paint Shops: Synchronized conveyor control across 50+ zones
- Packaging Lines: High-speed filling/capping machine coordination
- Water Treatment: Plant-wide valve network synchronization
- Material Handling: Palletizer PLC-I/O integration with ≤2ms response
- Food Processing: Multi-zone cooker temperature control (IP65 washdown kits)
- Mining: Reliable data exchange in vibration-intensive crusher controls
- Discrete Manufacturing: Multi-robot workcell I/O consolidation
4.Competitive Advantages
Operational superiorities:
- Network Resilience: Dual-path redundancy maintains uptime during cable faults
- TCO Reduction: Eliminates 20+% cabling costs via distributed topology
- Synchronization Precision: ±500µs sampling for motion-critical systems
- Scalability: Supports 99 nodes/1,000+ I/O per ControlNet network
- Diagnostics Depth: Module-level LED codes identify faults within 3s
- Installation Simplicity: Pre-configured EDS files auto-map tags in Studio 5000®
- Legacy Integration: Backward-compatible with 1771 I/O via 1794-ASB adapters
- Failsafe Operation: Auto-disconnects faulty modules to preserve network integrity
5.Functional Capabilities
Advanced network features:
- Real-Time Optimization: Bandwidth reservation for critical I/O (UCMM/COS)
- Predictive Maintenance: Tracks node voltage/SNR degradation via Produced Tags
- Redundancy Management: Hot-swap adapter replacement with configuration retention
- Peer Messaging: Produced/Consumed tags for inter-PLC data exchange
- Timed I/O Control: Scheduled output pulses synchronized across 5 racks
- Cyber Security: Lockable BNC connectors to prevent unauthorized access
- Data Logging: Stores last 10 network faults with timestamps
- FLEX Expansion: Cascades to 5 chassis via 1794-ACN15 extension adapters
| Parameter Category | Specification / Details |
| Module Description | ControlNet Communication Adapter with Integrated 15 Relay Outputs (POINT I/O™ System) |
| Primary Function | • ControlNet Network Adapter
• 15 Electromechanical Relay Outputs (SPST-NO) |
| Communication Protocol | ControlNet (Conforms to ControlNet Specification v2.0) |
| Data Transfer Rate | 5 Mbps |
| Network Connections | Two (2) BNC connectors (daisy-chain or tap topology) |
| Number of Relays | 15 (isolated outputs) |
| Relay Contact Rating | Resistive Load:
• 5 A @ 120V AC
• 2 A @ 24V DC
Inductive Load (AC1):
• 3 A @ 120V AC |
| Max Switching Voltage | 120V AC / 24V DC |
| Electrical Life | 100,000 cycles (rated load) |
| Backplane Connectivity | Supports up to 30 I/O modules (max. 8 slots without expansion) |
| Max Backplane Current | 5V DC: 4.0A total (shared across connected modules) |
| ControlNet Interface Power | 800 mA max from ControlNet tap (via network connector) |
| Status Indicators | Network:
• Green (OK)
• Red (Fault)
• Flashing Green (Self-test)
Relays:
• Per-channel LED (ON state) |
| Scheduling | Supports Scheduled & Unscheduled data transfers |
| RPI (Requested Packet Interval) | Configurable (2 ms to 750 ms) |
| Isolation | Relay-to-Backplane: 1,500V AC
Relay-to-Relay: 1,500V AC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Certifications | cULus Listed, CE, ATEX/IECEx Zone 2, RoHS |
| Compatible Bases | Direct mounting to DIN rail (no separate base required) |
| Dimensions (H x W x D) | 115 mm x 87 mm x 70 mm (4.53" x 3.43" x 2.76") |
Packaging & Shipping
Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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