Description
Product Overview
The Molex SST-PB3-CLX-RLL is an in-chassis PROFIBUS communication module designed to connect a Rockwell Automation Allen-Bradley ControlLogix controller to a PROFIBUS DP network.
The module provides a direct communication interface between the ControlLogix backplane and PROFIBUS field devices. It can operate as a PROFIBUS DP Master or Slave, making it suitable for distributed I/O, drives, instrumentation, and other PROFIBUS-compatible equipment.
The module uses a single 9-pin female D-sub PROFIBUS connection and is installed directly in a ControlLogix chassis. Molex identifies 1120160018 as the current part number associated with the engineering/old part number SST-PB3-CLX-RLL.
Key Features
- PROFIBUS DP communication for ControlLogix
- PROFIBUS DP Master / Slave operation
- 1 PROFIBUS communication channel
- Direct ControlLogix backplane installation
- 9-pin female D-sub PROFIBUS interface
- Data exchange between Logix processors and PROFIBUS devices
- Supports PROFIBUS communication speeds up to 12 Mbps
- Supports large distributed I/O configurations
- Compatible with Rockwell ControlLogix systems
- Configuration through SST configuration software and Rockwell programming environment
- Useful for modernization and maintenance of legacy PROFIBUS installations
Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | Molex |
| Product Family | SST |
| Model | SST-PB3-CLX-RLL |
| Molex Part Number | 1120160018 |
| Product Type | PROFIBUS Communication Module |
| Function | PROFIBUS DP Master / Slave |
| Network | PROFIBUS DP |
| Number of Channels | 1 |
| Network Connector | PROFIBUS D-sub Female, 9-pin |
| System Location | ControlLogix |
| Mounting | PLC Module / ControlLogix Chassis |
| Compatible Platform | Rockwell Automation ControlLogix |
| Maximum Baud Rate | Up to 12 Mbps |
| Configuration Software | Rockwell RS5000 / SST Console Software |
| Supported Configuration OS | Windows XP / Vista / 7 / 8 / Server 2003 / Server 2008 / Server 2012 |
| Net Weight | Approx. 430 g |
| Product Status | Not Active |
| Engineering / Old PN | SST-PB3-CLX-RLL |
Molex’s official product record confirms the 1120160018 cross-reference, ControlLogix system location, one PROFIBUS D-sub female port, PLC-module slot configuration, SST Console/RS5000 configuration software, and approximately 430 g net weight.
Communication & Data Handling
The SST-PB3-CLX-RLL was designed for applications where a ControlLogix processor needs to exchange data with PROFIBUS equipment.
Typical network devices include:
- Remote I/O stations
- Variable-frequency drives
- Motor controllers
- Process instruments
- Valve positioners
- Distributed control equipment
- PROFIBUS DP slave devices
The module can operate as a PROFIBUS Master or Slave. In a Master application, it manages communication with PROFIBUS DP devices and transfers the resulting process data into the ControlLogix system.
Data Capacity
The SST PB3 architecture supports two principal data-transfer approaches. Direct mode maps PROFIBUS data into the ControlLogix processor image, while paging mode provides access to a larger user-defined data area.
Published documentation describes up to:
- 496 input bytes / 496 output bytes in direct mode
- 1984 input bytes / 1968 output bytes using paging mode
This makes the module suitable for larger PROFIBUS networks where the controller needs access to more distributed process data.
PROFIBUS Network
Supported PROFIBUS communication rates include:
- 9.6 kbps
- 19.2 kbps
- 31.25 kbps
- 45.45 kbps
- 93.75 kbps
- 187.5 kbps
- 500 kbps
- 1.5 Mbps
- 3 Mbps
- 6 Mbps
- 12 Mbps
For an existing installation, always match the module configuration with the PROFIBUS master/slave settings, network baud rate, device addresses, and GSD configuration.
Installation Notes
The SST-PB3-CLX-RLL is intended for installation in a compatible ControlLogix chassis.
Before commissioning:
- Verify the exact module part number and revision.
- Confirm that the ControlLogix chassis and controller configuration are compatible.
- Install the module in an available chassis slot.
- Connect the PROFIBUS network through the 9-pin D-sub connector.
- Confirm PROFIBUS master/slave configuration.
- Configure the required PROFIBUS devices and I/O mapping.
- Verify node addresses and communication speed.
- Check module diagnostics after startup.
- Confirm that process data is correctly transferred between PROFIBUS and ControlLogix.
Do not replace a PROFIBUS module based only on connector appearance. Check the complete catalog number and software/configuration requirements.
Application Areas
The module is particularly useful in legacy automation systems where ControlLogix must communicate with existing PROFIBUS equipment.
Common applications include:
- Factory automation
- Process control
- Packaging machinery
- Material handling
- Manufacturing lines
- Distributed I/O systems
- Drive control networks
- Plant maintenance and system expansion
- ControlLogix modernization projects
Compatibility Note
Rockwell Automation’s support documentation specifically identifies the SST-PB3-CLX-RLL as a PROFIBUS scanner for the 1756 ControlLogix backplane and Honeywell PlantScape systems.
Molex’s current catalog identifies the part as 1120160018, with SST-PB3-CLX-RLL listed as the engineering/old part number. Molex also marks the product as not active, so this model is primarily relevant to existing installations, maintenance, and spare-parts requirements.
FAQ
Q: What is the SST-PB3-CLX-RLL?
A: It is a PROFIBUS DP communication module for Rockwell Automation ControlLogix systems.
Q: Can it work as a PROFIBUS Master?
A: Yes. It supports PROFIBUS DP Master operation.
Q: Can it also operate as a Slave?
A: Yes. The module supports PROFIBUS DP Master/Slave functionality.
Q: How many PROFIBUS ports does it have?
A: It has one PROFIBUS communication port using a 9-pin female D-sub connector.
Q: What is the Molex replacement/current part number?
A: Molex identifies 1120160018 as the part number associated with the engineering/old PN SST-PB3-CLX-RLL.
Q: Is it compatible with ControlLogix?
A: Yes. It is designed for installation in the ControlLogix system backplane.
Q: Is the SST-PB3-CLX-RLL still an active product?
A: Molex currently lists 1120160018 as not active. It can therefore be relevant as a replacement or spare for existing systems.
Q: What software is used for configuration?
A: Molex lists Rockwell Automation RS5000 and SST Console Software among the configuration software.
Recommended Related Models
For customers maintaining Rockwell/Molex PROFIBUS and ControlLogix systems, related models and part numbers include:
- Molex 1120160018
- Molex SST-PB3-CLX-RLL
- Molex SST-PB3-CLX-RLL-CC
- Molex 112016-0023
- Molex SST-PB3-CLX-DTM
- Molex 112016-0019
- Molex SST-PB3-REM
- Molex SST-PB3-REM-CC
- Molex SST-PFB-CLX
- Molex SST-PFB3-CLX
Always verify the exact hardware revision and application requirements before selecting a substitute.
Inspection Before Shipment
For an industrial communication module, functional inspection should include:
- Model and part-number verification
- Connector inspection
- PCB and housing inspection
- ControlLogix backplane recognition
- PROFIBUS communication test
- LED/status diagnostic verification
- Configuration/software recognition
- Network data exchange test where test equipment is available
For a replacement spare, keeping the original configuration information and PROFIBUS network parameters available can significantly reduce commissioning time.
