Allen-Bradley SLC 500 1747-L553 CPU, 1746-P3, 1746-A7, 1747-SDN Bundle

Allen-Bradley SLC 500 1747-L553 CPU, 1746-P3 PS, 1746-A7 Rack, and 1747-SDN Module Bundle

Engineered for mission-critical automation loops, this pre-integrated Allen-Bradley SLC 500 hardware bundle provides a robust, modular platform for legacy industrial and marine automation control architectures. Centered around the high-performance 1747-L553 SLC 5/05 CPU with built-in Ethernet connectivity, this assembly includes the 1746-A7 7-slot modular chassis, the 1746-P3 power supply unit, and the 1747-SDN DeviceNet scanner module. This configuration delivers reliable real-time data processing, seamless node distribution, and resilient operational stability in harsh environments.

Model Details

• System Assembly MPN: AB-SLC500-505SDN-07CPU Module
• MPN: 1747-L553 (SLC 5/05, 64KB Memory, Ethernet, RS-232 Channel)
• Power Supply MPN: 1746-P3 (Standard Line Voltage, 120/240V AC Input)
• Chassis / Rack MPN: 1746-A7 (7-Slot Modular Backplane)
• Communication Module MPN: 1747-SDN (DeviceNet Scanner)

Technical Specifications

Part Number Cross-References

• CPU Equivalents: 1747-L551, 1747-L552, 1747-L543
• Power Supply Equivalents: 1746-P1, 1746-P2, 1746-P4, 1746-P7
• Chassis Alternatives: 1746-A4, 1746-A10, 1746-A13
• Communication Alternatives: 1747-SN, 1747-KE, 1747-UIC

Key Features

1. High-speed execution engine with integrated 10/100 Mbps Ethernet port for direct plant-floor data tracking.
2. Robust 7-slot 1746-A7 backplane architecture allowing flexible mixing of discrete, analog, and communication modules.
3. 1747-SDN DeviceNet scanner supports real-time diagnostics, explicit/implicit messaging, and node configuration down to the device level.
4. Integrated 1746-P3 power supply protects against line transients and supplies stable isolation across internal rails.
5. Non-volatile EEPROM/flash memory storage support prevents data loss during sudden loss of main electrical power feeds.

Applications

• Marine propulsion control and dynamic positioning auxiliary architectures.
• Oil & gas upstream skid monitoring and automated valve control packages.
• Water and wastewater treatment plant pumping station management.
• Heavy manufacturing conveyor lines and automated packaging systems.
• Power generation auxiliary balance-of-plant automation loops.

Frequently Asked Questions

Can the 1747-L553 CPU communicate with modern Logix controllers?

Yes. Although the SLC 5/05 runs on legacy architecture, its built-in Ethernet port allows it to exchange peer-to-peer data with ControlLogix and CompactLogix processors via MSG instructions over EtherNet/IP messaging protocols.

Is the 1747-SDN module hot-swappable?

No. The SLC 500 backplane architecture does not support true power-on hot-swapping for modules. Always power down the 1746-P3 power supply before inserting or extracting the 1747-SDN or any other I/O module to prevent electrical arcing or bus damage.

What software is required to program this SLC 500 bundle?

Programming and configuration require Rockwell Automation’s RSLogix 500 software package running on a compatible Windows workstation, paired with RSLinx Classic for communication routing over serial or Ethernet interfaces.

How do I verify the firmware revision of the 1747-L553 processor?

You can query the exact firmware revision by connecting via RSLinx/RSLogix 500, opening the controller properties dialog box, or reading the physical identification sticker affixed to the front housing of the CPU module.