New Allen Bradley 1771-SDN  DeviceNet Scanner Module 2-Channel WITH HIGH QUALITY

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Product reference       1771-SDN

The 1771-SDN DeviceNet Scanner Module by Allen-Bradley provides interface between DeviceNet devices and the PLC 5 Processors and it communicates with DeviceNet Devices on the Network to read inputs, write outputs, download configured data, and monitor DeviceNet device operational status, and it also communicates with the PLC 5 Processors in the form of Discrete I/O (DIO) and Block Transfer (BT). The module has a node address of 63 and transfers information over the network at a speed of 125 Kbits per second (Baud rate). The 1771-SDN occupies a single slot on the 1771 I/O chassis, and it draws 0.8A current at 5V DC from the backplane and a 50mA current at 24V DC per channel from DeviceNet. The 1771-SDN provides optical isolation, tested to withstand 500V AC for 1 minute, between the backplane and DeviceNet Channel, and from DeviceNet Channel’s 1 Mega Ohms Resistor to Chassis. 
The 1771-SDN is tested to function without de-rating, at an operational temperature range between 0 and 60 0C (32 and 140 0F) at 5-95% non-condensing relative humidity environment and it is stored at a temperature range of –40-85 0C (–40-185 0F). The module is IEC-tested to withstand an operational shock of 30G (withstand 50G non-operational) and a vibration of 2G at 10-500Hz. The 1771-SDN is designed to meet various certification agency standards, it meets the CISPR 11: Group 1, Class A, the IEC Surge Transient Immunity Standards, and the IEC-Conducted RF Immunity Standards. The module weighs approximately 0.9kg (1.9lb), with a dimension of 270 x 30 x 170mm (10.6 x 1.2 x 6.7 inches), and is c-UL, CE, C-TICK, and ODVA-certified.

The Allen-Bradley / Rockwell Automation 1771-SDN is a PLC DeviceNet Scanner Module. Communication is block-transfer with the PLC-5 processor. Operations for 1771SDN include scan I/O and process messages. Communication port protocol is DeviceNet.

PLC-5 System Overview A PLC-5/1771 control system, at minimum, consists of a programmable controller and I/O modules in a single 1771 chassis with a power supply. You choose the controller with the on-board communication ports you need. 

On-board remote I/O scanner ports are available on all PLC-5 controllers. On-board extended-local I/O scanner ports are available on some PLC-5 controllers. On-board ControlNet ports are available on some PLC-5 controllers. To provide a DeviceNet I/O scanner port to the system, you must add a 1771-SDN DeviceNet Scanner Module. 

In the typical configuration illustration, a ControlNet port on the controller interfaces the processor to the ControlNet link. In each of the two chassis remote from the controller, a 1771-ACN15 I/O Adapter Module provides I/O modules in those chassis with an interface to the ControlNet link. In this configuration, the PLC-5 controller monitors/controls the I/O in its local I/O chassis as well as the I/O in the remote locations. 

Plug a 1771 power supply module into an I/O module slot, or connect a standalone 1771 power supply into the left end of each chassis. Depending on the communication ports available on your particular PLC control system, you can select operator interfaces that are compatible with those particular ports. Lay out the system by determining the network configuration and the placement of components in each location. Decide at this time whether each location will have its own controller. Place each controller’s I/O on an isolated network to maximize the performance and to more easily accommodate future network or 4 Introduction Publication 1785-SG001B-EN-P - June 2006 system configuration changes. If you plan to share I/O, make sure the I/O is on a network that each controller can access. Assume that Network A and Network B both require a controller and its I/O. Both controllers interact with time-critical information.

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