Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1440-ACNR |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | XM ControlNet Adapter |
| Series | XM Series |
| ControlNet Communication Rate | 5 Mbits/s (fixed) |
| XM Bus Communication Rate | 500 Kbits/s (fixed) |
| I/O Capacity | Up to 10 XM Dynamic Measurement modules (1440-DYN02-01RJ) |
| Input Voltage | 24 VDC |
| Current Draw (Max) | 120 mA |
| XM Bus Output | 24 VDC, 3 A max |
| Power Consumption | 2.4 W maximum |
| Isolation Voltage | 50 V continuous; type tested at 900 V AC for 60 s |
| Status Indicators | 4 LEDs (Module, Backplane/XM Bus, ControlNet A, ControlNet B) |
| ControlNet Connectors | 2 × BNC coax receptacles (Channel A and Channel B) |
| Node Address Setting | 2-position pushwheel switches (01–99) |
| Network Access Port | NAP for programming/maintenance devices |
| Operating Temperature | -20°C to +70°C (-4°F to +158°F) |
| Enclosure Type | Open-style (requires protective enclosure) |
| Wiring Category | 1 (power ports); 2 (communications ports) |
| Country of Origin | United States |
Main Features and Advantages
The ALLEN-BRADLEY 1440-ACNR delivers core value by consolidating XM measurement data into a deterministic ControlNet interface, simplifying system architecture while maintaining the data integrity required for machinery protection applications.
Unified XM Bus Management: The ALLEN-BRADLEY 1440-ACNR acts as the local controller for an XM measurement cluster, supporting up to ten Dynamic Measurement modules on a single XM Bus . This architecture allows a single ControlNet connection point to serve an entire measurement system, reducing wiring complexity and network infrastructure requirements compared to distributing measurement modules directly on the network.
Deterministic ControlNet Communication: Operating at a fixed 5 Mbits/s, the ALLEN-BRADLEY 1440-ACNR provides high-speed transport of time-critical I/O and interlocking data alongside messaging data for configuration and program upload/download . The dual BNC channels A and B support media redundancy, enhancing network availability for critical monitoring applications.
Integrated Network Access Port: The ALLEN-BRADLEY 1440-ACNR features a Network Access Port (NAP) that provides a bidirectional electrical interface for programming, maintenance, and I/O monitoring devices . Technicians can connect directly to the adapter using the 1786-CP cable without disrupting the primary ControlNet network, simplifying commissioning and troubleshooting.
Comprehensive Status Diagnostics: Four LEDs on the ALLEN-BRADLEY 1440-ACNR indicate module status, backplane (XM Bus) status, and individual ControlNet channel conditions . These indicators support rapid fault identification, distinguishing between module faults, XM Bus communication issues, and ControlNet link problems.
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