Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1734-ACNR |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | POINT I/O ControlNet Network Adapter |
| Input Voltage (Nominal) | 24V DC |
| Input Voltage Range | 10…28.8V DC |
| Field Side Power Requirements | 425 mA @ 24V DC (28.8V DC max) |
| Inrush Current | 6 A for 10 ms |
| POINTBus Current | 1000 mA @ 5V DC ±5% (4.75…5.25V) |
| Power Consumption at 24V | 8.0 W |
| Power Dissipation (Max) | 2.8 W @ 28.8V |
| Input Overvoltage Protection | Reverse polarity protected |
| Maximum POINT I/O Modules | 64 modules |
| Maximum Rack Connections | 5 (digital modules only) |
| Maximum Direct Connections | 25 (required for analog/specialty modules) |
| Scheduled Transmit Data Memory | 586 bytes |
| Operating Temperature | -20…55 °C (-4…131 °F) |
| Country of Origin | Singapore |
| Standard Warranty | 1 year |
| Lifecycle Status | End of Life (Discontinued March 31, 2027) |
| Replacement Product | 1734-AENTR |
Main Features and Advantages
ControlNet Network Integration with Redundant Media: The 1734-ACNR connects POINT I/O systems to ControlNet networks with support for redundant media configurations, providing network resilience through dual cable paths . This redundancy ensures that a single cable fault does not interrupt I/O communication, maintaining process availability in critical applications. The adapter manages data transfers between ControlNet controllers and POINTBus backplane modules, enabling deterministic, high-speed exchange of time-critical I/O data .
Flexible Connection Architecture with Multi-Controller Support: The 1734-ACNR supports up to 5 rack I/O connections and 25 direct I/O connections, allowing multiple controllers to establish communication with POINT I/O modules through a single adapter . Digital modules using Rack Optimization communication format can share rack connections, while analog and specialty modules require direct connections. This architecture enables distributed control strategies where different controllers can own different I/O modules within the same POINT I/O station .
Integrated Power Supply with Backplane Current Capacity: The 1734-ACNR contains a built-in power supply that converts 24V DC field power to 5V DC backplane power, delivering up to 1.0A of backplane current for POINT I/O modules . When additional backplane current is required, the 1734-EP24DC Backplane Extension Power Supply can add up to 1.3A, enabling the maximum configuration of 63 modules (with no more than 25 analog or specialty modules) .
Removal and Insertion Under Power (RIUP): The 1734-ACNR supports RIUP, allowing POINT I/O modules to be removed and inserted while backplane power remains active . This capability significantly reduces mean time to repair by enabling module replacement without system shutdown. Combined with removable wiring systems that keep terminal bases in place, RIUP minimizes downtime during maintenance and troubleshooting .
Comprehensive Diagnostics and Network Access Port: The 1734-ACNR features LED diagnostic indicators for module status, network status (A/B channels), and POINTBus status, providing clear visual feedback for normal operation and fault conditions . A Network Access Port (NAP) on the front panel enables local connection of programming terminals for configuration, monitoring, and troubleshooting without disturbing the ControlNet network .
