Allen-Bradley 1747-SDN Serial Data Network Module

The Allen‑Bradley 1747-SDN DeviceNet Scanner Module is a DeviceNet master interface that links an SLC 500 chassis to a DeviceNet network, enabling the SLC 500 PLC to poll up to 63 node‑addressable devices. It installs in a 1747 backplane chassis and provides a 10‑pin DeviceNet port for network wiring, with front‑panel indicators that include a Module status LED and a Network status LED to show module health and network link state. Programming and operation are performed via the SLC 500 environment (RSLogix 500) using the M0/M1 files, and the module supports DeviceNet Explicit Messaging (DEM) for configuration and data exchange, including AutoScan capabilities to streamline device polling. In typical configurations, the 1747‑SDN acts as the scanner/master on the DeviceNet network, bridging the SLC 500 controller to multiple DeviceNet devices and mapping their I/O data within the processor’s data tables. This module is part of Allen‑Bradley’s 1747 family designed specifically for SLC 500 controllers and is not intended for modern ControlLogix platforms. Documentation on installation, node addressing, and data organization—along with explicit messaging and I/O mapping details—can be found in the module’s user manuals and installation guides.