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6ES7540-1AD00-0AA0

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Siemens 6ES7540-1AD00-0AA0 is an S7-1500 CM PtP module for RS232 communication using Freeport, 3964(R), or USS telegrams.
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Technical specifications for 6ES7540-1AD00-0AA0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7540-1AD00-0AA0
  • Product Family:
    Siemens Simatic S7-1500
  • Product Type:
    CM PtP RS232 BA Communication Module
  • Stock:
    1
  • Serial Interface:
    1 x RS232
  • Connector:
    9-pin Sub-D
  • Maximum Transmission Rate:
    19.2 kbit/s
  • Maximum Cable Length:
    15 m
  • RS232 Auxiliary Signals:
    RTS, CTS, DTR, DSR, RI, and DCD
  • Integrated Protocols:
    Freeport and 3964(R)
  • Maximum Telegram Length:
    1 kbyte
  • Character Length:
    7 or 8 bits
  • Stop Bits:
    1 or 2
  • Parity Options:
    None, even, odd, fixed 1, fixed 0, or any
  • Receive Buffer:
    2 kbyte
  • Buffered Telegrams:
    Up to 255
  • Input Address Space:
    8 bytes
  • Rated Backplane Current:
    50 mA
  • Typical Power Loss:
    0.6 W
  • Isolation Test:
    707 V DC
  • Horizontal Operating Temperature:
    0 to +60 °C
  • Vertical Operating Temperature:
    0 to +40 °C
  • Weight:
    0.573 lbs (0.26 kg)
  • Estimated shipping dimensions:
    15.1x15.1x5cm
  • Tariff Code:
    8517620000
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals RS232 Port Telegrams Diagnostics Mounting

Features:

  • One nine-pin RS232 port connects a serial device to the S7-1500 controller.
  • Freeport and 3964(R) telegram processing uses configurable framing and buffered reception.
  • RUN, ERROR, RxD, and TxD indicators distinguish module, receive, and transmit states.
Siemens 6ES7540-1AD00-0AA0 exchanges serial telegrams through the controller backplane.

Framing, cable length, and auxiliary-signal use define the 6ES7540-1AD00-0AA0 RS232 connection.

Buffer and diagnostic states let the CPU supervise 6ES7540-1AD00-0AA0 communication.

The Siemens 6ES7540-1AD00-0AA0 CM PtP RS232 BA Communication Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7540-1AD00-0AA0 CM PtP RS232 BA Communication Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Serial Electrical Connection

  • Connector: A nine-pin Sub-D carries data and auxiliary signals.
  • Signals: RTS, CTS, DTR, DSR, RI, and DCD support the configured handshake.
  • Distance: The serial cable remains within the documented 15 m limit.
  • Isolation: The RS232 circuit is electrically separated from the backplane bus.

Frame and Buffer Handling

  • Freeport: The user-defined frame can use the selected character length, parity, and stop bits.
  • 3964(R): The integrated protocol provides framed serial telegram transfer.
  • Length: A single received or transmitted telegram can contain up to 1 kbyte.
  • Buffer: The 2 kbyte memory can queue as many as 255 telegrams for program access.

Communication State Indication

  • RUN: The green indicator reports the module operating state.
  • ERROR: The red indicator reports a module or configuration fault.
  • RxD and TxD: Yellow indicators separate receive traffic from transmit traffic.
  • Alarm: The CPU can receive a diagnostic alarm and wire-break information.

S7-1500 System Connection

  • Rail: The module mounts on the S7-1500 mounting rail.
  • Backplane: System power and the process image pass through the backplane bus.
  • Address area: Eight input bytes are reserved for the module interface.
  • Orientation: Vertical installation uses a lower 40 °C maximum than horizontal installation.
Description
Siemens 6ES7540-1AD00-0AA0 is a SIMATIC S7-1500 CM PtP RS232 BA communication module that connects one serial device to the controller through a nine-pin Sub-D interface. Its backplane process image and communication instructions move telegram data between the RS232 port and the CPU program.

The RS232 path on 6ES7540-1AD00-0AA0 exposes RTS, CTS, DTR, DSR, RI, and DCD auxiliary signals and supports cable runs up to 15 m. Character length, stop bits, and parity are parameterized for the connected device, while the configured rate is limited to 19.2 kbit/s.

Freeport and 3964(R) processing in 6ES7540-1AD00-0AA0 accept telegrams up to 1 kbyte. A 2 kbyte receive buffer can retain as many as 255 telegrams, allowing the controller program to separate serial reception from its cyclic execution.

The S7-1500 backplane supplies 6ES7540-1AD00-0AA0 and isolates the serial interface from the internal bus. RUN, ERROR, RxD, and TxD indicators separate module state from receive and transmit activity, while wire-break and diagnostic alarms report port or configuration conditions.
Alternative Names
6ES75401AD000AA0 6ES7540 1AD00 0AA0 6ES 7540 1AD00 0AA0 Siemens 6ES7540-1AD00-0AA0 6ES7540-1AD00-0AA0 CM PtP RS232 BA 6ES754O-1ADOO-OAAO 6ES7S40-1AD00-0AA0 6ES7540-IAD00-0AA0
Technical notes
Siemens 6ES7540-1AD00-0AA0 combines one RS232 port, configurable character framing, buffered telegram reception, and isolated S7-1500 backplane power.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does 6ES7540-1AD00-0AA0 receive no characters although TxD flashes?
Compare the 6ES7540-1AD00-0AA0 RS232 pinout, receive and transmit crossover, common reference, remote-port mode, and cable length.
What causes framing errors on 6ES7540-1AD00-0AA0?
Match the 6ES7540-1AD00-0AA0 baud rate, data bits, parity, stop bits, handshake, and telegram timing to the connected serial device.
Why do telegrams accumulate in the 6ES7540-1AD00-0AA0 buffer?
Check the 6ES7540-1AD00-0AA0 receive instruction, program call cycle, status handling, frame termination, and whether the CPU acknowledges completed telegrams.
How should an intermittent wire-break diagnostic on 6ES7540-1AD00-0AA0 be isolated?
Inspect the 6ES7540-1AD00-0AA0 Sub-D seating, conductor continuity, shield, strain relief, signal reference, and remote device power.
Why does 6ES7540-1AD00-0AA0 stay in ERROR after downloading the project?
Verify the 6ES7540-1AD00-0AA0 hardware catalog entry, slot, parameter block, protocol settings, CPU diagnostics, and module seating.
What should be checked when 6ES7540-1AD00-0AA0 transmits but the remote device ignores data?
Confirm the 6ES7540-1AD00-0AA0 handshake state, protocol framing, telegram terminator, character timing, RS232 polarity, and remote-device operating mode.