6ES7241-1CH30-1XB0
6ES7241-1CH30-1XB0
6ES7241-1CH30-1XB0
6ES7241-1CH30-1XB0
6ES7241-1CH30-1XB0
6ES7241-1CH30-1XB0
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6ES7241-1CH30-1XB0

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Siemens 6ES7241-1CH30-1XB0 is a CB 1241 RS485 communication board for SIMATIC S7-1200 controllers.
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Technical specifications for 6ES7241-1CH30-1XB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7241-1CH30-1XB0
  • Product Family:
    Siemens Simatic S7-1200
  • Product Type:
    SIMATIC S7-1200 CB 1241 communication board
  • Stock:
    1
  • Physical interface:
    RS485
  • Connection:
    Terminal block
  • Protocol mode:
    Freeport serial communication
  • Maximum cable length:
    1000 m under documented RS485 conditions
  • Backplane current:
    50 mA
  • Power loss:
    1.5 W
  • Protection class:
    IP20
  • Weight:
    0.031 kg
  • Estimated shipping dimensions:
    3.8x6.2x2.1cm
  • Tariff Code:
    85176200
  • Country of origin:
    China
  • 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 RS485 Interface Protocol Setup Bus Diagnostics Product Applications

Features:

  • RS485 channel: one serial interface is added directly to a supported S7-1200 CPU
  • Freeport operation: the PLC program can exchange application-defined serial frames
  • Terminal connection: field wiring reaches the board without a separate rack module
Electrical focus: Build a linear bus with consistent polarity, reference and two-end termination.

Protocol focus: Use the same frame format and timing at the PLC and partner device.

Diagnostic focus: Separate physical-layer errors from program-sequence timeouts.

Apter Power supports Siemens 6ES7241-1CH30-1XB0 communication board quotations, technical documents and RS485 configuration review.
Siemens 6ES7241-1CH30-1XB0 SIMATIC S7-1200 CB 1241 RS485 communication board 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.
  • Bus wiring: Maintain A/B polarity and a common reference across all nodes.
  • Termination: Fit termination only at the two ends of the trunk.
  • Cable routing: Use suitable shielded twisted pair and keep it away from switching power conductors.
  • Frame format: Set baud rate, data bits, parity and stop bits to the partner-device values.
  • Addressing: Prevent duplicate node addresses where the application protocol uses them.
  • Timing: Allow for response delay, timeouts and direction control in the program sequence.
  • No communication: Check supply, polarity, common, termination and connector seating.
  • Corrupted frames: Review shielding, reflections, baud rate and frame-format settings.
  • Intermittent nodes: Inspect stubs, grounding, network length and device-specific error counters.
  • Instrument links: Transfer data with serial meters, analyzers or controllers.
  • Drive interfaces: Connect supported RS485 drives using the required application protocol.
  • Legacy devices: Integrate equipment that exposes a documented RS485 serial interface.
Description
Serial instruments and drives can be integrated into a compact S7-1200 station through 6ES7241-1CH30-1XB0, a CPU-mounted CB 1241 board with one RS485 interface. Its Freeport function lets the PLC program exchange application-defined frames without adding a separate rack communication module.

Reliable communication through 6ES7241-1CH30-1XB0 depends on the electrical bus and the frame definition agreeing at the same time. A/B polarity, reference conductor, two-end termination and linear topology address the physical layer, while baud rate, parity, stop bits and timing govern the protocol exchange.

For intermittent links, 6ES7241-1CH30-1XB0 is best assessed from the trunk outward: first examine shared wiring and termination, then compare received frames and program timeouts at the affected node. This separates reflections or grounding problems from an error in the PLC communication sequence.
Alternative Names
6ES7241-1CH30-1XB0 6ES72411CH301XB0 6ES7 241-1CH30-1XB0 6ES7241 1CH30 1XB0 Siemens 6ES7241-1CH30-1XB0 CB 1241 RS485 SIMATIC S7-1200 CB1241 6ES7241-1CH30-1XB0 RS485 board
Technical notes
RS485 faults on 6ES7241-1CH30-1XB0 are often configuration or topology related. Record the entire bus layout and verify A/B polarity, reference conductor, two-end termination, cable shield, baud rate, parity, stop bits and node addressing before changing the board.
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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 a partner device stay silent after 6ES7241-1CH30-1XB0 begins transmitting?
First confirm A/B polarity, common reference and two-end termination; then compare baud rate, parity, stop bits and node address. A valid outgoing frame with no reply points toward the bus or partner configuration.
How can corrupted frames on 6ES7241-1CH30-1XB0 be separated from a PLC parsing error?
Capture or count received characters before application parsing. Framing or checksum errors that change with cable routing or termination indicate the physical layer, while stable frames rejected by the program indicate protocol logic.
Where should termination be placed on an RS485 trunk using 6ES7241-1CH30-1XB0?
Terminate the two physical ends of the linear trunk. Extra termination, long stubs or star branches change the bus impedance and can make communication fail only at certain baud rates or node combinations.
Can 6ES7241-1CH30-1XB0 reliably serve an RS485 star network?
A linear daisy-chain is the appropriate topology for reliable RS485 operation. If existing wiring forms a star, use a suitable repeater or redesign the segments rather than treating each branch as an ordinary stub.
Why do 6ES7241-1CH30-1XB0 errors increase when nearby drives run?
Variable-frequency drive cabling can couple noise into the serial pair or reference conductor. Review separation, shield bonding, grounding and common-mode voltage, then compare error counts with the drives stopped and running.
How should transmit-to-receive timing be handled in a Freeport program for 6ES7241-1CH30-1XB0?
Allow the partner's response delay and the bus direction turnaround before declaring a timeout. The program should not start a new request while the previous response window is still active.
What indicates a reference-potential problem on a multi-vendor bus connected to 6ES7241-1CH30-1XB0?
Communication that changes when one node is disconnected, or repeated interface stress with correct A/B polarity, can indicate excessive common-mode voltage. Evaluate the reference conductor and isolation strategy for the complete bus.