Allen-Bradley 1734-ADN Overview
The Allen-Bradley 1734-ADN is a POINT I/O DeviceNet communication adapter module from Rockwell Automation. It serves as the interface between a DeviceNet network and local POINT I/O modules, enabling distributed I/O implementation. With its compact, DIN rail-mounted design, this module supports up to 63 powered modules and 504 I/O points, making it a scalable solution for various industrial applications.
This adapter operates on a 23 Volts DC input voltage and draws 400 milliamps from the field side, with an inrush current of 6 amps. Its power consumption is 8.1 Watts, and it dissipates 2.8 Watts at 28.8 Volts. The module also draws 1000 milliamps from the POINTBus, ensuring reliable communication with connected I/O modules.
Key Technical Specifications
Understanding the technical parameters of the 1734-ADN helps engineers integrate it effectively. The module supports DeviceNet communication rates of 125K, 250K, or 500K bits per second, with autobaud detection for automatic rate matching. It features an Auto Device Replace (ADR) function that transfers configuration parameters from a removed device to a replacement module, simplifying maintenance.
The adapter is installed on the leftmost position of a POINT I/O rack, vertically on a DIN rail. It includes a thumbwheel switch for setting the node address (0 to 63), with non-volatile memory storing the default address. The module also features status LEDs for diagnostics and a self-test on power-up.
Installation and Configuration Best Practices
For optimal performance, position the 1734-ADN vertically on the DIN rail and apply firm pressure until the locking mechanism engages. Connect the DeviceNet plug and tighten the holding screws on both sides. Set the node address using the thumbwheel switch, and configure the primary DeviceNet network and subnet I/O module addresses to match your system. The autobaud feature automatically detects the network baud rate, ranging from 125K to 500K bits per second.
This adapter is an ideal replacement for other DeviceNet modules in a POINT I/O system, offering seamless integration and robust communication. Its compact design and high I/O capacity make it suitable for applications requiring distributed control, such as material handling, packaging, and process automation.
By leveraging the 1734-ADN's capabilities, engineers can design efficient, scalable control systems that meet the demands of modern industrial automation.