Allen-Bradley SST-PB3-CLX-RLL PROFIBUS Communication Module

Allen-Bradley SST-PB3-CLX-RLL PROFIBUS Communication Module

Configured for PROFIBUS DPV0 slave communication in ControlLogix systems, the Allen-Bradley SST-PB3-CLX-RLL (SST-PB3-CLX-RLL PROFIBUS Communication Module) provides one-channel network interfacing through a nine-pin D-Sub connection. The module supports up to 125 PROFIBUS DP slaves and 256 I/O modules.

Hardware Specifications

ControlLogix PROFIBUS DPV0 Interface Characteristics

The SST-PB3-CLX-RLL provides one PROFIBUS DPV0 slave channel through a female nine-pin D-Sub network connector. The interface supports transmission rates from 9600 baud through 12 Mbaud, covering the listed standard PROFIBUS communication rates.

The module occupies one ControlLogix slot and can be installed in any available slot position. A maximum of eight modules may be installed within one rack according to supplied specifications.

Input data capacity is specified as 122 Words, while the supported I/O module quantity reaches 256 modules. Therefore, system configuration should account for both PROFIBUS process-data allocation and ControlLogix backplane loading.

The specified backplane current is 850 mA at 5 VDC and 1.75 mA at 24 VDC. These values should be included when calculating ControlLogix power-supply loading.

Frequently Asked Questions (FAQ)

Q: What PROFIBUS operating mode does the SST-PB3-CLX-RLL support?
A: The supplied specification identifies the module as a PROFIBUS DPV0 slave interface.

Q: What connector is provided for the PROFIBUS network connection?
A: The module provides one PROFIBUS D-Sub female connector with nine pins.

Q: Can the module be installed in any ControlLogix slot?
A: Yes, the supplied specification identifies the module location as any slot with single-slot width.

Field Installation Guidelines

Install the module only in a compatible ControlLogix rack with sufficient backplane current capacity. Verify available rack power before energizing the configured module group.

Connect the PROFIBUS cable to the nine-pin D-Sub interface using wiring practices appropriate for PROFIBUS networks. Maintain physical separation between communication wiring and high-voltage or high-current conductors.

Use the specified PROFIBUS connector and maintain proper cable shielding continuity throughout the communication segment. Avoid routing PROFIBUS cables parallel to motor feeders, switching conductors, or other high-noise circuits.

Follow the PROFIBUS network topology and termination requirements applicable to the connected segment. Do not modify termination settings without confirming the electrical position of the device within the bus segment.

Before commissioning, verify the configured baud rate, DPV0 slave parameters, process-data allocation, and ControlLogix rack configuration. Confirm that the configured input data size remains within the specified 122-Word capacity.

For maintenance, isolate power before removing or inserting the module unless the installed ControlLogix configuration and applicable procedures specifically permit live-module handling. Verify connector seating and cable shielding after maintenance.