Allen-Bradley SLC-500 via TCP/IP
- Last UpdatedOct 26, 2021
- 1 minute read
The information included in the following pages describes how to connect Allen-Bradley SLC-500 devices using the ABTCP protocol to a Plant SCADA system.
All SLC models (500, 5/01, 5/02, 5/03, and 5/04) are supported. Using this method, you can connect to multiple SLCs as in the following diagram:

You cannot make a direct physical Ethernet connection to an SLC. An Ethernet Interface (EI) must be provided - typically by using a 5/250 Pyramid Integrator.
The Allen-Bradley Ethernet arrangement requires a BOOTP server. The BOOTP server is required by the AB EI modules to download configuration information. Refer to your Allen-Bradley documentation for BOOTP information. Often a 1747-AIC module is used between the SLCs and the DH-485 networks, to give a convenient programming port.
This diagram does not show all the possible connection options - consult your Allen-Bradley manuals for more information.