Product Overview
The Siemens 6ES7211-1HE40-0XB0 is a compact S7-1200 CPU 1211C DC/DC/Relay industrial automation module. With 50 KB work memory, 6 digital inputs (24 V DC), 4 relay outputs (2 A), and 2 analog inputs (0-10 V DC), this CPU provides a cost-effective solution for small to medium control tasks. Its integrated PROFINET interface and support for OPC UA enable seamless connectivity, reducing total cost of ownership through simplified wiring and faster commissioning.
Key Technical Specifications
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Work memory: 50 KB integrated, non-expandable
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Load memory: 1 MB integrated, expandable via SIMATIC Memory Card
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Digital inputs: 6, 24 V DC, source/sink, high-speed counting up to 100 kHz
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Digital outputs: 4 relay, 2 A resistive load, switching delay ≤10 ms
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Analog inputs: 2, voltage 0-10 V DC, 10-bit resolution, 625 µs conversion time
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Power supply: DC 20.4–28.8 V, typical power loss 8 W
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PROFINET interface: 1 port RJ45, IO Controller/Device, 100 Mbit/s
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OPC UA server: Yes, with Basic license required
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Dimensions: 90 × 100 × 75 mm; weight approx. 380 g
Installation & Setup Guidance
Mount the Siemens 6ES7211-1HE40-0XB0 on a standard DIN rail or directly on a panel using the integrated mounting clips. Ensure adequate air circulation for cooling; the CPU operates from -20 °C to 60 °C horizontally and up to 50 °C vertically. Use a 24 V DC power supply with reverse polarity protection. Connect field wiring to the removable screw terminals: digital inputs accept 24 V DC signals, relay outputs handle up to 2 A resistive loads, and analog inputs accept 0-10 V DC. For PROFINET, use a standard RJ45 cable (shielded recommended) up to 100 m.
Compatibility & Integration
The Siemens 6ES7211-1HE40-0XB0 integrates into PROFINET networks as an IO Controller (up to 16 devices) or IO Device. It supports open IE communication (TCP/IP, ISO-on-TCP, UDP), MODBUS TCP, and OPC UA server for data exchange. For PROFIBUS or AS-Interface, add the corresponding communication modules (CM 1243-5, CM 1242-5, or CM 1243-2). The CPU can be programmed with STEP 7 V17 or higher using LAD, FBD, or SCL. It also supports S7 communication, web server, and up to 64 total connections (PG, HMI, S7, Open User, Web, OPC UA).
Selection Guide & Purchasing Advice
Before purchasing the Siemens 6ES7211-1HE40-0XB0, verify your power supply voltage (24 V DC) and I/O count. The CPU includes 6 digital inputs, 4 relay outputs, and 2 analog inputs. For additional I/O, add signal boards (e.g., SB 1222 for pulse outputs) or communication modules. This model is ideal for compact automation replacing older S7-200 systems or for new cost-sensitive projects. Order from a trusted supplier like ubest101 to ensure genuine Siemens parts and fast delivery.