Overview
The Allen-Bradley 1747-SDN is a single-slot DeviceNet scanner module engineered for SLC 500 rack-mounted programmable logic controllers. This module functions as a DeviceNet master, facilitating seamless communication between SLC 500 processors and DeviceNet slave devices on the network. The 1747-SDN is a critical component for extending legacy SLC 500 systems into DeviceNet environments without requiring processor replacement.
Key Features
- Supports up to 63 DeviceNet nodes at 125 Kbps baud rate
- Operates in slave mode with Polled, Strobe, Change-of-State, and Cyclic I/O configurations
- Pass-through configuration enables network bridging and replacement of obsolete DeviceNet cards (1770-KFD, 1784-PCD, 1784-PCID, 1784-PCIDS)
- LED status indicators for module operation and network connectivity monitoring
- 30V circuit isolation (Basic Insulation Type) between DeviceNet and backplane
- Compact open-style mounting with screw and plug-in terminal connections
Technical Specifications
- Communication Protocol: DeviceNet
- Backplane Current: 500 mA at 5V DC
- DeviceNet Current: 90 mA at 24V DC
- Baud Rate: 125 Kbps (maximum 63 nodes)
- Operating Temperature: 0 to 60°C (32 to 140°F)
- Storage Temperature: -40 to 85°C (-40 to 185°F)
- Humidity: 5 to 95% non-condensing
- Vibration Withstand: 2G at 10-500 Hz
- Shock Rating: 30G maximum
- Enclosure Type: Open-style
- Certifications: UL, c-UL-us, CE, CUL, GOST, KC, MARINE
- Isolation: 500V AC for 60 seconds (DeviceNet-to-backplane)
Typical Applications
- Legacy SLC 500 system integration with modern DeviceNet I/O networks
- Multi-node DeviceNet scanner for variable frequency drives, sensors, and valve controllers
- Manufacturing equipment retrofit requiring DeviceNet master functionality
- Pass-through bridging for segmented DeviceNet networks
- Batch processes and distributed process control requiring Cyclic I/O or Change-of-State messaging
Compatibility & Replacements
The 1747-SDN is compatible with SLC 500 processors SLC 5/02, 5/03, 5/04, and 5/05. For pass-through configuration (network bridging), use SLC 5/03, 5/04, or 5/05. This module directly replaces discontinued DeviceNet connection cards including the 1770-KFD, 1784-PCD, 1784-PCID, and 1784-PCIDS in appropriate applications. Verify processor firmware revision and DeviceNet configuration software compatibility before installation. The module communicates with the SLC processor via M1/M0 file transfers and discrete I/O, exchanging configuration data, device I/O data, and status information.
