1761-NET-DNI MicroLogix

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The 1761-NET-DNI by Allen-Bradley and Rockwell Automation is a DeviceNet-to-DF1 protocol-conversion device that allows the user to communicate between DF1 devices on a DeviceNet network. This hardware has a single DeviceNet connection point and a single RS-232 connection. Primary functions for this hardware include: collection and receiving of input data from the DF1 device (connected to its RS-232 port) and forwarding that data to a master, monitoring of output data received from the DeviceNet master and writing it to the DF1 device, and allowing the sending and receiving of messages between DF1 devices on the DeviceNet network.

Physical specifications for this hardware include a 24 Volt DC power source requiring 11-25 Volts DC and an internal isolation of 500 Volts DC. Ambient operating temperature is between 0 and 60 degrees Celsius and storage temperature is between -40 and 85 degrees Celsius. Peer to peer messaging for this hardware is available only to other controllers/DNI’s and its baud rate is 125K, 250K, and 500K. To mount this device onto a DIN rail, first you must safely mount your DIN rail. Once the DIN rail is mounted, snap the DIN rail latch into the closed position. Next, place the top slot on the device over the DIN rail. Finally, while pressing the hardware against the rail, snap the device into its proper position. For configuring the master/slave I/O, first unpack and mount the DNI and connect the DNI to the DeviceNet network. It should be noted that when power is first applied to the DNI, it’s default is to reside at node 63 on the network and configuration is defaulted to autobaud. Next, connect the DNI with a network configuration tool, such as DeviceNet Manager or RSNetWorx, and set the DNI to your desired node number. This process is called ‘node commissioning.’ Once this is completed, next you must double-click on the DNI icon to open the DNI’s EDS. For DNI Series A, set the DNI mode to ‘standby’ mode. For DNI Series B, set I/O Scan Enable to disable. Finally, click ‘Save to Device.’VIIIVThe 1761-NET-DNI by Allen-Bradley and Rockwell Automation is a DeviceNet Interface (DNI). It has a 24 Volt DC power source requirement of 11 to 25 Volts DC and a 24 Volt DC current draw of 200 milliamps (typical) and 400 milliamps for maximum inrush current. This hardware has an internal isolation of 500 Volts DC for one minute.