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Description
Technical Specifications
Product Model | 1440-ACNRManufacturer | Rockwell Automation / Allen-BradleyProduct Type | XM Series ControlNet Communications Adapter ModuleCommunication Protocol | ControlNet (CIP), 5 Mbps fixedXM Bus Communication Rate | 500 KbpsMax. Connected XM Modules | 10 (1440-DYN02-01RJ Dynamic Measurement Modules)Power Supply Voltage | 24V DC (Class 2, SELV/PELV)Max. Supply Current | 120 mA @ 24V DCMax. Power Consumption | 2.4 WNetwork Interface | Dual BNC coaxial (RG-6), Channels A & B for redundancyNetwork Access Port (NAP) | Yes, for local programming/maintenanceNode Address Setting | Rotary DIP/pushwheel switches (0–99)Status Indicators | 4 LEDs – Module Status (MS), Backplane/XM Bus, ControlNet A Link, ControlNet B LinkOperating Temperature | 0 °C to +60 °C (32 °F to 140 °F)Storage Temperature | -40 °C to +85 °CRelative Humidity | 5% to 95% non-condensingMounting Method | 35 mm DIN rail or panel mount (with XM terminal base)Isolation Voltage | 900V AC tested for 60 sec (XM Bus to ControlNet, ControlNet to User Power)Dimensions (H×W×D) | Approx. 86.4 × 50.8 × 115 mm (3.4 × 2.0 × 4.5 in.)Wire Size (Power Terminals) | 22–14 AWG (0.34–2.1 mm²) stranded or solid copperScrew Torque (Power Terminals) | 0.8 N·m (7 lb·in)
Main Features and Advantages
The Allen-Bradley 1440-ACNR delivers several key advantages that make it the preferred choice for integrating XM condition-monitoring hardware into a Rockwell ControlNet architecture.Deterministic ControlNet communication: The Allen-Bradley 1440-ACNR operates on the proven ControlNet scheduled‑message protocol, guaranteeing repeatable, low-latency I/O updates essential for real-time machinery protection and high-speed dynamic measurement. Unlike Ethernet-based I/O that can be subject to variable latency, ControlNet’s token-passing MAC layer ensures that scheduled I/O data from connected XM modules arrives at the controller within a predictable time window.Native XM bus bridging: The module’s integrated XM bus connector passes both power and CAN-based XM network communications to downstream measurement modules without requiring additional interface hardware. Up to ten 1440-DYN02-01RJ dynamic measurement modules can be daisy-chained on a single XM bus segment, with the Allen-Bradley 1440-ACNR automatically managing backplane communications and providing internal 120 Ω termination at the adapter end of the bus.Redundant media support via dual BNC ports: Channel A and Channel B BNC coaxial interfaces allow the Allen-Bradley 1440-ACNR to participate in a redundant ControlNet media configuration. In the event of a cable fault on one channel, the network automatically fails over to the second channel, preserving communications continuity—a critical feature in continuous-process industries where unplanned downtime is unacceptable.On-board diagnostics and local access port: Four multi-color LEDs give immediate visual feedback on module health, XM bus activity, and ControlNet link status for both channels, significantly reducing troubleshooting time during commissioning or maintenance. The built-in Network Access Port (NAP) permits a laptop or handheld programmer to connect locally for configuration, I/O forcing, or data retrieval without disturbing the plant-wide ControlNet backbone.Compact DIN-rail form factor with industrial-grade isolation: The Allen-Bradley 1440-ACNR mounts directly onto standard 35 mm DIN rail alongside XM terminal bases, keeping panel footprint minimal. Tested isolation of 900V AC between the XM bus, ControlNet media, and user power circuits protects sensitive electronics from ground loops and transient voltage disturbances commonly encountered in heavy-industrial environments.Seamless Rockwell software integration: With its published EDS file and native support in RSNetWorx for ControlNet as well as Studio 5000 / RSLogix 5000, the Allen-Bradley 1440-ACNR is recognized automatically by the engineering workstation. Add‑on instructions (AOIs) provided for the XM measurement modules simplify data mapping, allowing engineers to focus on application logic rather than low-level communications programming.
Application Field
The Allen-Bradley 1440-ACNR is purpose-built for industrial condition monitoring and predictive maintenance applications where dynamic signals—such as vibration acceleration, displacement, pressure pulses, or strain—must be acquired locally and reported deterministically to a plant-wide control system. Typical deployment scenarios include rotating equipment monitoring on large motors, centrifugal pumps, compressors, fans, and turbines in power generation, oil & gas, pulp & paper, and metals processing plants. In these environments, the Allen-Bradley 1440-ACNR connects one or more 1440-DYN02-01RJ XM Dynamic Measurement Modules—each capable of acquiring high-speed analog waveforms from accelerometers, proximity probes, or pressure transducers—to the ControlNet network so that peak values, RMS trends, and alarm states are available to the ControlLogix processor for alarming, historization, and asset-health calculations.Beyond machinery protection, the Allen-Bradley 1440-ACNR is also used in batch and continuous process industries where localized measurement clusters need to report to a central DCS/PLC over ControlNet rather than point-to-point wiring. Examples include multi-point pressure profiling on extrusion lines, structural strain monitoring on large fabricated assemblies, and bearing-temperature trending across conveyor drive trains. Because ControlNet supports both scheduled I/O and unscheduled explicit messaging, the Allen-Bradley 1440-ACNR can simultaneously deliver fast cyclic measurement data to the controller while allowing occasional configuration changes, firmware uploads, or data log downloads through unscheduled message packets.In retrofit projects upgrading legacy DeviceNet or remote-I/O architectures to ControlNet, the Allen-Bradley 1440-ACNR offers a straightforward path to preserve existing XM measurement hardware investment while gaining the bandwidth and determinism of a ControlNet backbone. Its compatibility with standard ControlNet coaxial cabling and repeaters means it can be located remotely from the main control cabinet—inside local junction boxes or machine-mounted enclosures—further reducing field wiring cost and improving signal integrity close to the sensors.
