The Allen-Bradley 1747-L553, also cataloged as the 1747-L553 SLC 5/05 Controller, operates as a dedicated PLC processor component for executing ladder logic programs and managing Ethernet, RS-232, and remote I/O communication within SLC 500 control platforms.

Model Identification & Revision Matrix

The 1747-L553 belongs to the Allen-Bradley SLC 5/05 processor family. This controller provides CPU execution, user memory storage, communication interfaces, and discrete/analog I/O management for SLC 500 modular systems.

Hardware Specifications

The 1747-L553 processor module provides central control execution for SLC 500 modular chassis systems. It communicates with installed I/O modules through the SLC backplane and supports Ethernet and serial communication channels for programming, diagnostics, and remote data exchange.

Industrial Control Network Integration

The 1747-L553 applies Allen-Bradley PLC architecture characteristics, including Ethernet communication capability and deterministic controller-to-device data exchange. The Ethernet interface supports BOOTP configuration, while the RS-232 channel supports multiple DF1 communication modes and DH-485 networks.

The controller supports firmware flash compatibility within the SLC 5/05 family. Proper revision matching between processor firmware, RSLogix 500 software, and connected communication devices is required for system operation.

Ordering Information

The shipment configuration includes:

• 1 x Allen-Bradley 1747-L553 SLC 5/05 Processor Module
• 1 x Factory processor assembly
• 1 x Product identification label

Additional components required for a complete SLC 500 system:

• SLC 500 chassis assembly
• Compatible SLC power supply
• SLC I/O modules
• Programming communication cable or Ethernet connection equipment

Field Installation Guidelines

Processor Mounting

• Install the processor module into the designated SLC 500 chassis slot.
• Confirm chassis power is removed before module insertion or removal.
• Ensure the module locking tabs are fully engaged.

Communication Wiring

• Use shielded communication cables where required by the installation environment.
• Separate communication wiring from high-voltage power conductors.
• Verify Ethernet cable termination and network addressing before commissioning.

System Configuration

• Confirm processor firmware revision compatibility with RSLogix 500 software.
• Verify memory configuration before downloading application programs.
• Check local and remote I/O addressing after installation.

Frequently Asked Questions

• What is the main function of the 1747-L553 processor?

The 1747-L553 executes SLC 500 control programs and manages communication between the processor, I/O modules, and connected networks.

• Which programming software is used with the 1747-L553?

The controller is configured and programmed using RSLogix 500 software with compatible SLC 5/05 firmware revisions.

• What communication ports are available on this processor?

The module provides Ethernet communication and an RS-232 serial port supporting DF1, DH-485, and ASCII protocols.

• Does the 1747-L553 support remote I/O systems?

Yes. The processor supports remote I/O communication with up to 4096 input points and 4096 output points.

• What memory type is used in the 1747-L553?

The controller uses Flash EEPROM technology for application program storage and firmware management.

• Can the 1747-L553 replace other SLC 5/05 processors?

Replacement depends on memory size, firmware revision, application requirements, and communication configuration.

• What temperature range can the processor operate in?

The specified operating temperature range is 0 to 60 deg C for normal installation conditions.

• Does the controller support Ethernet programming connections?

Yes. The Ethernet interface supports controller communication, programming access, and BOOTP network configuration.