Allen-Bradley 1738-ACNR ArmorPoint Communication Adaptor Module

The 1738-ACNR is a ControlNet network adapter from the ArmorPoint I/O family by Rockwell Automation (Allen-Bradley). It enables distributed I/O communication over ControlNet in on-machine applications. With an IP67-rated sealed housing and dual TNC connectors for media redundancy, it is designed for rugged industrial environments.

Technical Specifications

• Catalog Number: 1738-ACNR
• Manufacturer: Rockwell Automation (Allen-Bradley)
• Module Type: ControlNet Network Adapter
• Communication Protocol: ControlNet
• Connector Type: Dual TNC (Channel A and B)
• Auxiliary Power Connector: 4-pin mini-style
• Input Voltage Range: 10–28 V DC
• Field Power Requirements: 24 V DC (+20%) @ 425 mA
• Power Consumption: 8.0 W max @ 24 V DC
• Inrush Current: 6 A for 10 ms
• Node Address Range: 01–99 (set via rotary switches)
• Status Indicators: Adapter, PointBus, ControlNet A/B, System Power
• Environmental Rating: IP67 (sealed housing)
• Operating Temperature: –20°C to +60°C
• Storage Temperature: –40°C to +85°C
• Mounting: DIN rail or panel mount
• Dimensions (W × H × D): Approx. 102 mm × 50 mm × 47 mm
• Weight: 0.5 kg
• Replacement Product: 1738-AENTR (EtherNet/IP adapter)

Functional Highlights

• Enables ControlNet communication for ArmorPoint I/O modules
• Dual media support via redundant TNC connectors (Channel A/B)
• Sealed IP67 housing for direct machine-level mounting
• Supports autobaud and explicit messaging for flexible integration
• Diagnostic LEDs for quick fault and communication status
• Compatible with Studio 5000 and Logix controllers
• Includes terminating base for the last I/O module in the backplane
• Fallback configuration during faults (Idle or Last State)