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SIEMENS 6ES7540-1AB01-0AA0 Point-to-point communication module

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SIEMENS · SIMATIC S7-1500

6ES7540-1AB01-0AA0

CM PtP RS422/485 BA

PtP COMMUNICATION

↔

Interface

RS-422 / RS-485

≋

Transmission

19.2 kbit/s

▣

Connector

15-pin D-sub

Direct Contact

✉ sales@amikon.cn ☎ +86 180 2077 6792

SIMATIC S7-1500 · CM PtP · RS422/485 BA

6ES7540-1AB01-0AA0

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Product Details

SIMATIC S7-1500

Overview Parameters Applications Comparison FAQ Contact

COMMUNICATION MODULE

Siemens 6ES7540-1AB01-0AA0

SIMATIC S7-1500 CM PtP RS422/485 BA

Point-to-point communication module for serial RS-422 and RS-485 connections, with Freeport, 3964(R) and USS communication capabilities.

FAMILY

CM PtP

INTERFACE

RS-422 / RS-485

CONNECTOR

15-Pin D-Sub

Siemens 6ES7540-1AB01-0AA0 SIMATIC S7-1500 CM PtP RS422/485 BA

MAX. RATE

19.2 kbit/s

MAX. CABLE

1,200 m

PRODUCT SNAPSHOT

Core Technical Profile

↔

SERIAL INTERFACE

RS-422 / RS-485

Point-to-point serial communication

◉

TRANSMISSION RATE

19.2 kbit/s

Maximum rate for this BA module

⌁

CABLE LENGTH

1,200 m

Maximum specified cable length

▣

CONNECTOR

15-Pin D-Sub

15-pin D-sub socket

ENGINEERING VIEW

Technical Characteristics

Product type	CM PtP RS 422 / 485 BA
Compatible controller family	SIMATIC S7-1500
RS-485 transmission rate	Maximum 19.2 kbit/s
RS-422 transmission rate	Maximum 19.2 kbit/s
RS-422 connection	4-wire full duplex
Maximum cable length	1,200 m
Integrated protocols	Freeport, 3964(R), USS
Maximum Freeport telegram length	1 kbyte
Telegram buffer	2 kbyte / up to 255 telegrams
Diagnostics	Diagnostics function and diagnostic alarm; wire-break diagnosis
Electrical separation	Potential separation between backplane bus and interface

⌁

SYSTEM ROLE

Where It Fits

The 6ES7540-1AB01-0AA0 is designed for serial point-to-point communication within SIMATIC S7-1500 automation architectures.

It is particularly relevant where an S7-1500 station needs an RS-422 or RS-485 serial connection to a compatible communication partner using Freeport, 3964(R) or USS communication.

WHEN ENGINEERS SEARCH FOR THIS PART

Serial communication is no longer operating as expected.

A communication module requires replacement during maintenance or troubleshooting.

A failed serial interface can interrupt communication with connected field equipment and extend system downtime.

FAMILY CHECK

Which CM PtP Variant Fits the Job?

Characteristic	6ES7540-1AB01-0AA0	6ES7541-1AB01-0AB0
Family	CM PtP RS422/485 BA	CM PtP RS422/485 HF
RS-485 maximum rate	19.2 kbit/s	250 kbit/s
RS-422 maximum rate	19.2 kbit/s	115.2 kbit/s
Modbus RTU	Not listed as an integrated protocol for the BA variant	Master / Slave
Typical selection priority	Standard serial PtP communication up to 19.2 kbit/s	Higher serial speed and broader protocol requirements

The BA and HF variants should be selected according to the required serial speed, protocol function and communication architecture.

ENGINEERING FAQ

Questions Engineers Usually Need Answered

Can the 6ES7540-1AB01-0AA0 be used for both RS-422 and RS-485 communication?

Yes. The CM PtP RS422/485 BA provides both RS-422 and RS-485 serial interfaces. RS-422 supports a 4-wire full-duplex connection, while the specified maximum transmission rate for both interface types is 19.2 kbit/s.

What is the maximum cable distance supported by the 6ES7540-1AB01-0AA0?

The specified maximum cable length is 1,200 m for both RS-485 and RS-422 operation. The actual installation should still follow the electrical characteristics and wiring requirements of the selected serial network.

Which communication protocols are available on the 6ES7540-1AB01-0AA0?

The BA variant integrates Freeport and 3964(R), and it also provides USS communication functions. Freeport supports telegrams up to 1 kbyte, with configurable character bits, stop bits and parity.

How does the 6ES7540-1AB01-0AA0 differ from the higher-performance 6ES7541-1AB01-0AB0?

Both belong to the S7-1500 CM PtP RS422/485 family, but the HF variant provides higher serial transmission rates. The 6ES7540-1AB01-0AA0 is specified at up to 19.2 kbit/s, while the 6ES7541-1AB01-0AB0 reaches higher rates and adds Modbus RTU master/slave capability.

What diagnostic functions are useful when troubleshooting this module?

The module provides diagnostic functions, diagnostic alarms and wire-break diagnosis. Its RUN, ERROR, RxD and TxD LEDs also provide local status indications that can help technicians distinguish operating, error, receiving and transmitting conditions.

ORDER SUPPORT

Prepare These Details

Part Number

Quantity

Destination

Required Date

Machine / System

ORDER TERMS

Supply Details

DELIVERY

3–5 Days

WARRANTY

6–12 Months

PACKAGING

Brand New

PAYMENT

T/T

Delivery way: E-packing / FedEx / EMS / TNT / DHL / UPS

AFTER-SALES PROCESS

Refund & Replacement

Please contact us within 7 days after receiving the item if any issue requires attention.

Returned items should remain in their original condition. Please provide the specific reason for return so the appropriate return or replacement process can be arranged after receipt.

The buyer is responsible for shipping expenses associated with the return process.

PRODUCT SUPPORT

Need the 6ES7540-1AB01-0AA0?

Send the part number, quantity, destination, required date and machine/system details for a faster response.

DIRECT CONTACT

SALES MANAGER

Miya Zheng

sales@amikon.cn

PHONE / WHATSAPP

+86 180 2077 6792

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