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The Allen Bradley 1734-ACNR is a ControlNet communication adapter module used in distributed I/O systems. It serves as the central interface between field I/O modules and a ControlNet network, enabling deterministic and scheduled data exchange between controllers and remote devices.
Installed at the head of a POINT I/O node, this module manages communication for all connected I/O modules on the backplane. It is designed for applications where predictable data timing and network reliability are essential.
The module supports redundant media connections, making it suitable for systems that require continuous operation and high fault tolerance.
The POINT I/O system allows flexible and modular expansion of distributed I/O, with communication adapters acting as the core interface to industrial networks.
| Parameter | Specification |
|---|---|
| Model | 1734-ACNR |
| Module Type | ControlNet Adapter |
| Network Protocol | ControlNet |
| Communication Speed | 5 Mbps |
| Media Type | Coaxial ControlNet |
| Redundancy Support | Yes (dual media) |
| Max Supported I/O Modules | Up to 63 |
| Supply Voltage | 24V DC |
| Voltage Range | 19.2–28.8V DC |
| Input Current | Approx. 400–450 mA |
| Inrush Current | Approx. 6 A (short duration) |
| Backplane Current | Up to 1000 mA @ 5V DC |
| Power Consumption | Approx. 8–10 W |
| Power Dissipation | Approx. 5 W |
| Isolation | Electrical isolation between network and backplane |
| Indicators | Module status, network status, activity LEDs |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5–95% non-condensing |
| Mounting | DIN Rail |
| Enclosure Type | Open style |
| Dimensions | Approx. 63 × 107 × 148 mm |
| Weight (kg) | Approx. 0.33 kg |
The 1734-ACNR acts as the communication hub for a POINT I/O station, handling all network traffic between the controller and connected modules.
It supports scheduled and unscheduled messaging, allowing deterministic control for time-critical applications.
Dual-media redundancy ensures communication continuity if one network path fails, increasing system reliability.
LED indicators provide clear visual feedback on module health, communication status, and network activity.
The module is designed for easy installation and integrates seamlessly with other POINT I/O components.
This adapter is commonly used in systems where reliable and predictable communication is required:
It is especially useful in environments where timing precision and synchronization are critical.
Deterministic Network Performance
Ensures consistent and predictable data exchange for time-sensitive operations.
Redundant Communication Support
Dual network ports provide high availability and reduce the risk of communication failure.
High Expansion Capability
Supports a large number of I/O modules, making it suitable for complex systems.
Reliable Industrial Design
Built to operate under demanding environmental conditions with stable performance.
Centralized Communication Management
Acts as a single interface for all connected modules, simplifying system configuration.
Clear Diagnostics
LED indicators and status feedback help reduce troubleshooting time.
| Model | Type | Channels / Ports | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1734-ACNR | ControlNet Adapter | Network Node | 24V DC | 63×107×148 | 0.33 |
| 1734-AENTR | Ethernet Adapter | Dual Port | 24V DC | 56×12×75.5 | 0.04 |
| 1734-232ASC | RS232 ASCII | 1 Port | 24V DC | 56×12×75.5 | 0.03 |
| 1734-485ASC | RS485 ASCII | 1 Port | 24V DC | 56×12×75.5 | 0.03 |
| 1734-4IOL | IO-Link Master | 4 Ports | 24V DC | 56×12×75.5 | 0.036 |
| 1734-IB8 | Digital Input | 8 Inputs | 24V DC | 56×12×75.5 | 0.04 |
| Model | Type | Key Function | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1769-L33ER | PLC Controller | Compact control processor | 24V DC | 118×87×87 | 0.50 |
| 1756-L81E | PLC Controller | High-performance processor | 24V DC | 175×90×140 | 0.65 |
| 1756-EN2T | Communication | Ethernet communication module | 24V DC | 145×35×140 | 0.30 |
| 1734-AENTR | Adapter | Ethernet I/O adapter | 24V DC | 56×12×75.5 | 0.04 |
| 5069-IB16 | Digital Input | 16-point input module | 24V DC | 138×42×95 | 0.25 |