Siemens 6ES7288-5CM01-0AA0 SB CM01 RS485/RS232 Communication Signal Board
A communication signal board adding one configurable serial interface to a compatible S7-200 SMART CPU.
Product Identification
Siemens 6ES7288-5CM01-0AA0 is the SIMATIC S7-200 SMART SB CM01 communication signal board. It provides an RS485/RS232 interface for supported communication tasks, including Freeport operation.
Terminal X20 provides functional earth, Tx/B, RTS, M, Rx/A and a 5 V bias connection. The chosen electrical standard, pinout, baud rate, framing and protocol must match the connected device.
The board measures 35 × 52.2 × 16 mm, weighs 18.2 g and draws 50 mA from the 5 V supply. It must be selected and configured for a CPU that supports the CM01 signal-board position.
Engineering Data
Functions
Serial physical layer
Provides the configured RS485 or RS232 electrical interface.
Freeport messaging
Supports program-controlled serial frames under the approved communication logic.
Device integration
Connects documented instruments, drives or other serial devices to the S7-200 SMART CPU.
About IndustryParts
https://www.industryparts.com/Exact-model handling for 6ES7288-5CM01-0AA0
IndustryParts keeps the complete 6ES7288-5CM01-0AA0 identity, requested quantity and installed-system evidence together so the proposed supply can be checked against the actual application before dispatch.
Applications
Instrument link
Connects a compatible serial instrument through documented framing and wiring.
Legacy device interface
Adds RS232 or RS485 communication where an installed device cannot use Ethernet.
Custom protocol task
Supports Freeport telegram handling implemented in the controlled CPU project.
Lifecycle
Record
Keep port standard, pinout, cable, shield, termination, baud and framing settings.
Inspect
Check earth, reference conductor, polarity, termination and connector retention.
Validate
Record successful messages, timeouts, error handling and recovery after service.
FAQ
Q01Which serial standards does 6ES7288-5CM01-0AA0 support?
6ES7288-5CM01-0AA0 supports an RS485 or RS232 communication interface when wired and configured for the selected standard.
Q02What X20 wiring data should accompany 6ES7288-5CM01-0AA0?
Provide conductor-by-conductor assignments for functional earth, Tx/B, RTS, M, Rx/A and any 5 V bias use.
Q03Can 6ES7288-5CM01-0AA0 communicate without project configuration?
No. Electrical wiring alone is insufficient; port parameters, protocol or Freeport logic and message timing must match the connected device.
Q04What causes common 6ES7288-5CM01-0AA0 replacement faults?
Reversed RS485 polarity, missing common reference, incorrect termination or bias, wrong RS232 pinout, mismatched baud or framing and lost Freeport logic are common causes.
Q05How should 6ES7288-5CM01-0AA0 be accepted?
Record bidirectional messages with the real device, verify error and timeout handling, and prove communication recovers after a controlled power cycle.
