Allen-Bradley 1738-ACNR ArmorPoint ControlNet Network Adapter

Allen-Bradley 1738-ACNR ArmorPoint ControlNet Network Adapter The Allen-Bradley 1738-ACNR serves as the primary 1738-ACNR Network Adapter utilized to execute ControlNet communication and distributed I/O data exchange across ArmorPoint I/O platforms. The adapter interfaces ArmorPoint modules with the ControlNet network, manages PointBus communications, and supports distributed field-level I/O connectivity through a sealed industrial enclosure. Suffix Breakdown & Model Matrix The supplied documentation identifies 1738-ACNR as a single catalog number. No official suffix structure or configurable model matrix is specified in the provided data. Hardware Specifications Parameter Specification Model 1738-ACNR Brand Allen-Bradley Product Type ArmorPoint ControlNet Network Adapter Product Family ArmorPoint I/O Weight 0.78 lb Dimensions Not specified Operating Temp -20 to 60 deg C Storage Temp -40 to 85 deg C Power Consumption 8.0 W @ 24 VDC; 10.2 W @ 28.8 VDC max Communication Protocol ControlNet, 5 Mbps Input Voltage Range 10-28.8 VDC (24 VDC nominal) Field Power Requirement 24 VDC @ 425 mA max Inrush Current 6 A for 10 ms Power Dissipation 2.8 W max Thermal Dissipation 16.9 BTU/hr Isolation Voltage 50 V, tested at 1500 VAC for 60 s Expansion Capacity Up to 63 ArmorPoint I/O modules Rack-Optimized Connections 5 Direct Connections 25 Enclosure Rating IP65/IP66/IP67 (when marked) Connection Interface M12 quick disconnect Subnet Expansion Port M12 Housing Type Sealed ControlNet Communication and I/O Density Scaling The 1738-ACNR functions as a ControlNet communication interface between ArmorPoint I/O assemblies and higher-level control systems. Through PointBus integration, a single adapter can support up to 63 connected I/O modules while maintaining deterministic network communications at 5 Mbps. This architecture allows distributed I/O expansion without requiring additional network adapters for each field device cluster. Frequently Asked Questions Q: How many ArmorPoint I/O modules can be connected to one 1738-ACNR adapter? A: The adapter supports a maximum of 63 ArmorPoint I/O modules on the associated PointBus segment. Q: Does the 1738-ACNR provide electrical isolation? A: Yes. The unit is specified with a 50 V isolation rating and has been tested at 1500 VAC for 60 seconds. Q: Can the adapter be installed in washdown or outdoor industrial locations? A: The device is specified with IP65/IP66/IP67 enclosure ratings when appropriately marked and installed using the specified sealed connectors and cabling system. Field Installation Guidelines Mount the adapter according to ArmorPoint mechanical installation requirements and ensure all sealing surfaces remain intact. Use compatible M12 network and power connectors to maintain the specified enclosure protection level. Verify incoming supply voltage remains within the 10-28.8 VDC operating range before energizing the adapter. Separate communication cables from high-current motor and drive conductors to reduce conducted electrical noise. Ensure protective grounding is completed according to the control cabinet or machine grounding scheme. Inspect connector seals, locking mechanisms, and cable glands periodically where exposure to moisture, vibration, or contaminants is present. Confirm PointBus loading and connected module count remain within the supported system limits.