6ES7540-1AB00-0AA0 Product Overview
The 6ES7540-1AB00-0AA0 adds basic serial communication to SIMATIC S7-1500 systems. It supports RS422 and RS485 connections with Freeport, 3964(R) and USS protocols for legacy devices, drives and serial field equipment.
Engineering and Selection Decisions
Identify the serial standard
Verify RS422 or RS485 and the required two-wire or four-wire topology.
Match the protocol
Confirm Freeport, 3964(R) or USS before program and cable design.
Check baud rate limits
This BA version is specified up to 19.2 kbit/s.
Plan lifecycle support
Record that Siemens lists the module as a spare part with a successor.
Verified Siemens Technical Information
Reference: Siemens Industry Mall product and comparison data, checked 2026-08-26. Confirm the installed project against the latest applicable Siemens manuals.
Exact-Model Reference Image
Identification boundary
Confirm the complete article number, visible terminal or interface layout and installed project data. Similar appearance alone is not sufficient for substitution.
Typical Application Areas
6ES7540-1AB00-0AA0 FAQ
Which serial interfaces are supported?
The module supports RS422 and RS485.
Which protocols are integrated?
Freeport, 3964(R) and USS are listed for this BA version.
What is the maximum data rate?
The official data specifies 19.2 kbit/s.
How long can the serial cable be?
Siemens lists a maximum of 1,200 m, subject to the selected interface and installation conditions.
Is this the current generation?
Siemens lists it as a spare part and identifies 6ES7540-1AB01-0AA0 as the successor.
What should be checked before replacement?
Verify MLFB, port type, protocol, baud rate, connector pinout and TIA Portal configuration.
Company and Export Support
Checked identification before quotation
Our team supports industrial automation sourcing with article-number checks, corresponding product photography and practical export coordination. Send the installed model, quantity, destination and required delivery date for review.
Request a 6ES7540-1AB00-0AA0 Quotation
Sales Manager Cristina
Send the exact model, quantity, destination and delivery requirement.
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