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Siemens SIMATIC S7-1200 CPU 1211C DC/DC/DC PLC – 6ES7211-1AE40-0XB0

6ES7211-1AE40-0XB0 is a Siemens SIMATIC S7-1200 CPU 1211C DC/DC/DC compact PLC with 24 V DC supply, 6 digital inputs, 4 sourcing transistor outputs and 2 analog inputs. Current documentation specifies 75 KB work memory and integrated Ethernet/PROFINET. One optional board and up to three communication modules extend its capabilities; local SM expansion is not supported.

Model	CPU 1211C DC/DC/DC

Original price was: 22,000.00৳ .Current price is: 19,500.00৳ .

Price (incl. VAT)

Brand	Siemens
Series	SIMATIC S7-1200
Model	CPU 1211C DC/DC/DC
Part No	6ES7211-1AE40-0XB0
Power Supply	20.4–28.8 V DC
Digital Input	6
Digital Input Type	24V DC
Analog Input	2
Analog Input Type	Voltage (0-10V DC)
Analog Output	N/A
Analog Output Type	N/A
Program Memory	75 KB
Programming Software	TIA Portal
Communication Protocols	PROFINET IO, S7 Communication, TCP/IP, ISO-on-TCP, UDP, Modbus TCP
Communication Ports	1 × PROFINET / Ethernet RJ45
I/O Expansion Capability	1 × Optional SB, CB or BB in the Board Position; up to 3 Communication Modules
Maximum I/O Point	Maximum Digital Inputs: 10, Maximum Digital Outputs: 8
Programming Language	FBD, LAD, SCL
High Speed Counter	Upto 6
High Speed Pulse Output	Upto 4
Memory Card Support	Yes – SIMATIC Memory Card
Dimensions (W × H × D)	90 × 100 × 75 mm

Siemens SIMATIC S7-1200 CPU 1211C DC/DC/DC PLC – 6ES7211-1AE40-0XB0

6ES7211-1AE40-0XB0 identifies the Siemens SIMATIC S7-1200 CPU 1211C compact PLC in the DC/DC/DC configuration. It combines a 24 V DC controller supply, 24 V DC digital inputs and sourcing transistor outputs with onboard analog voltage inputs. Its small local I/O configuration suits machines that need sequence logic, sensor monitoring and Ethernet connectivity. This article is the conventional S7-1200 CPU, so expansion hardware must be selected for that generation.

Built-in Inputs and Outputs

The CPU provides 6 digital inputs rated for 24 V DC and 4 sourcing MOSFET digital outputs. Siemens specifies a maximum of 0.5 A per onboard output, with an output supply range of 20.4–28.8 V DC. Loads must remain within their electrical and switching limits. Use suitable interposing devices and suppression where required; the outputs do not directly supply a motor. Two separate onboard analog inputs accept 0–10 V DC signals. There are no built-in analog outputs. Additional analog functions require a compatible optional signal board.

Communication and Programming

The integrated Ethernet/PROFINET interface supports engineering and communication with appropriately configured automation equipment. Physical Ethernet connectivity and enabled communication services must be considered separately. Modbus TCP is implemented using the Siemens MB_CLIENT and MB_SERVER instructions through the CPU PROFINET connection. Serial communication requires optional hardware. Engineering uses SIMATIC STEP 7 in TIA Portal. The current exact-product data sheet lists firmware V4.7 and STEP 7 V20 or higher. LAD, FBD and SCL are supported. Check the installed firmware before selecting the engineering version, particularly when maintaining an older machine. Software licenses and cables are separate system items.

Memory and Technology Functions

Current Siemens documentation specifies 75 KB of work memory. The system manual separately lists 1 MB of internal load memory and 14 KB of retentive memory; these capacities serve different purposes and must not be added together as program memory. An optional SIMATIC Memory Card provides removable storage functions. Up to 6 high-speed counters can be configured using available onboard or signal-board inputs. Onboard inputs support up to 100 kHz single-phase counting, reduced to 80 kHz in quadrature operation. Up to 4 pulse generators can use the onboard outputs at up to 100 kHz. Actual counter and pulse configurations share finite terminals; pulse-generator count does not establish an equal number of independent motion axes.

Expansion Capability

CPU 1211C accepts one signal board, communication board or battery board in its board position, plus up to 3 communication modules within the system power budget. It does not support local SM signal-module expansion. Local digital capacity reaches 10 inputs with the optional 4-input SB 1221, or 8 outputs with the optional 4-output SB 1222. These are separate configurations and cannot coexist because each uses the same board position. An optional 2-input/2-output SB 1223 instead provides 8 inputs and 6 outputs simultaneously. Board voltage, wiring, current and temperature limits must be checked independently. These totals describe local physical digital I/O and exclude distributed network I/O.

Installation and Typical Applications

Provide an external regulated 24 V DC supply within the permitted 20.4–28.8 V DC range. The CPU measures 90 × 100 × 75 mm, which is useful when checking replacement-panel space. Install and wire it according to the Siemens system manual, including grounding, spacing, load protection and enclosure requirements. Technically appropriate applications include small conveyor sequences, packaging stations, compatible sensor monitoring and pump-control logic through properly rated switching equipment. These are application suggestions based on the verified functions; the complete machine determines suitability.

Exact Variant Verification

Check the complete article number when replacing a controller. AC-supplied or relay-output CPU 1211C variants have different electrical characteristics. Older documentation for this same article may show 50 KB of work memory and an earlier STEP 7 requirement. This workbook uses current Siemens V4.7 documentation as its reference and does not certify the firmware or memory of a particular physical unit. Verify the device identification and installed firmware before commissioning.

Official Manufacturer Links

Siemens SIMATIC S7-1200 CPU’s

Siemens SIMATIC S7-1200 CPU

• SIMATIC S7-1200 CPU 1211C compact PLC in the DC/DC/DC configuration.
• 24 V DC rated controller supply; permitted range 20.4–28.8 V DC.
• 6 onboard 24 V DC digital inputs.
• 4 onboard sourcing transistor outputs, maximum 0.5 A per output.
• 2 onboard 0–10 V DC analog inputs; no built-in analog outputs.
• 75 KB work memory on the current documented firmware basis.
• Integrated Ethernet/PROFINET; Modbus TCP through programmed Siemens instructions.
• One optional board position and up to 3 communication modules; no local SM expansion.

• Small machine sequence control using the onboard digital I/O.
• Conveyor interlocks and material-handling logic through suitable motor-control equipment.
• Packaging and assembly stations within the available I/O and timing limits.
• Pump-control logic using appropriately rated starters, drives and protection.
• Monitoring compatible 24 V DC digital sensors.
• Monitoring compatible 0–10 V DC instruments through the two analog inputs.
• Pulse counting from compatible sensors within the configured HSC frequency limits.
• Modbus TCP data exchange with compatible devices using the required PLC program.