Molex SST-ESR2-CLX-RLL Backplane Module Guia De Especificação

 

 

1 Ethernet + 2 Serial Channels 

For the Allen-Bradley

®

 ControlLogix

®

 Controller 

 

Overview 

The BradCommunications

™

 SST

™

 Ethernet / Serial module connects Rockwell 

Automation

®

 ControlLogix

®

 controllers to Modbus networks. Each module has 1 

Ethernet and 2 Serial communication channels that act as independent Modbus 
TCP Client/Server and Modbus Master or Slave protocols to exchange data with 
other Modbus compatible devices. 
 
The SST module acts as a 1756 input/output module between the Modbus network 
and the ControlLogix backplane. The data transfer from the SST

™

 module to the 

ControlLogix processor supports 2 modes; a direct mode allowing mapping of 
Modbus data in I/O processor image (496 inputs bytes / 496 output bytes) and a 
messaging mode (based on CIP transaction) allowing access to Modbus data 
images stored in 32K registers of the SST

™

 module’s memory. 

 
The SST module has a USB port on the front panel which can be used for the 
startup of the module when the user configuration is stored to a USB key.  This can 
also be beneficial if a breakdown occurs, allowing a very quick startup to occur with 
a new SST module. 
  

Configuration and Diagnostics 

Save your time, the SST module doesn’t require any ladder logic programming to 
be used. The configuration is created using a PC-based Windows console software 
connected via RLL (Remote Link Library) functionality allowing a remote access to 
the SST module for the configuration and the diagnostics through Rockwell network 
architectures (Ethernet/ControlNet/DeviceNet

™

). 

  
The SST console allows the user to define the network parameters, Modbus 
devices and the cyclic data exchanges. The console includes a user configuration 
manager offering services for download, upload, copy, and rename of user 
configurations.  With this, a user can very easily and quickly create a new 
configuration to initialize and start a SST module. 
 
The SST console includes diagnostic tools to help with the commissioning and 
monitoring of the Modbus connection. These tools allow access in read and write 
modes to the Modbus slaves or to monitor and modify the module’s internal data 
shared bound for a Modbus Master. Thus, the user-friendly tools are available for 
controlling the communication in commissioning phase (PROG mode). This same 
information is also available in production (RUN mode) through status words 
making it possible for the user to manage the execution of the control application in 
its ladder logic. 

The BradCommunications

™

 SST communications module 

connects your Rockwell Automation ControlLogix

®

 

controller with up to 1 Ethernet Modbus TCP and 2 Serial 
Modbus networks. 

Features 

y 

Save money!

  

1 Ethernet and 2 RS232/RS485 
Serial Modbus channels on a 
single slot - 1756 backplane 
compatible 

y 

Save time!

  

No ladder logic to write for 
configuration and data transfer 
between module and 
ControlLogix processor 

y 

Boot user configuration and 
update firmware module through 
integrated USB port  

y 

Data format: Bit, Byte, Word, 
Dword, Float 

y 

RLL feature : configure and 
diagnose Modbus network 
remotely via A-B RSLinx

®

  

y 

Advanced Windows configuration 
and diagnostics tools 

y 

Up to 8 SST™  modules can be 
used in one ControlLogix rack 

y 

Support local and remote 
chassis 

Protocols 

y 

Modbus TCP Client /Server 

y 

Modbus Serial Master or Slave 
(RTU / ASCII) 

Typical Applications 

y 

SCADA / supervisory 
communication 

y 

Integration of legacy Modbus 
devices 

y 

Bridge Rockwell networks to 
Modbus compatible devices 

 

 

03 Apr. 08 

DW2007211