Siemens 6ES7211-1HE40-0XB0 CPU 1211C – DC/DC/Relay for Automation

Product Overview

The 6ES7211-1HE40-0XB0 is a compact CPU from Siemens. It belongs to the SIMATIC S7-1200 series. This model has DC supply and relay outputs. It includes 6 digital inputs, 4 relay outputs, and 2 analog inputs. It is perfect for small to medium automation tasks.

Key Features

• Compact design – saves space in your control panel.
• Onboard I/O – 6 DI, 4 DO (relay), 2 AI (0-10V).
• Integrated PROFINET – easy connection to networks.
• 50 KB program memory – enough for many applications.
• Web server – monitor and control via browser.

Technical Specifications (Tree Structure)

• 6ES7211-1HE40-0XB0 – CPU 1211C
  • Supply – DC 20.4–28.8 V
  • Current consumption – 300 mA (CPU only), 900 mA max.
  • Inrush current – 12 A at 28.8 V
  • Power loss – 8 W typical
  • Memory
    • Work memory – 50 KB
    • Load memory – 1 MB (integrated)
    • Retentive data – 14 KB
  • Processing speeds
    • Bit ops – 0.08 µs
    • Word ops – 1.7 µs
    • Float ops – 2.3 µs
  • Digital inputs – 6 (24V DC, HSC capable)
  • Digital outputs – 4 relays (2A each)
  • Analog inputs – 2 (0–10V, 10-bit)
  • Interfaces – PROFINET (RJ45), supports TCP/IP, UDP, OPC UA
  • Communication – S7, MODBUS, AS-Interface (with CM)
  • Ambient temp – -20°C to 60°C (horizontal)
  • Protection – IP20, CE, UL, cULus, FM, KC, marine
  • Dimensions (WxHxD) – 90 x 100 x 75 mm
  • Weight – approx. 380 g

Expert Review (Manager’s Insight)

Manager’s Insight: The CPU 1211C is a reliable starter PLC. It has enough memory for small machines. The relay outputs handle 2A loads directly. The built-in web server makes diagnostics easy. It is a cost-effective choice for OEMs and panel builders. Simple to program with TIA Portal – saves engineering time.

Applications

• Small conveyor systems
• Packaging machines
• HVAC controls
• Pump and fan control
• Testing equipment

Comparison with Similar Models

• 6ES7211-1HE40-0XB0 (this model) – DC/DC/relay, 6DI/4DO/2AI
• 6ES7212-1AE40-0XB0 – DC/DC/DC, more I/O, larger memory
• 6ES7214-1AG40-0XB0 – larger CPU with more features
• 6ES7215-1BG40-0XB0 – high-end with onboard I/O and safety
• 6ES7211-1BE40-0XB0 – AC supply version

Frequently Asked Questions (FAQ)

• What is the program memory size?
  The work memory is 50 KB. It is not expandable.
• Can I add more I/O modules?
  Yes, you can add up to 3 communication modules and 1 signal board.
• What is the output type?
  The outputs are relay type – each can switch 2A.
• Does it support OPC UA?
  Yes, it has an OPC UA server (requires runtime license).
• What is the backup time for the clock?
  The hardware clock backs up for 480 hours (typical).
• Is the 24V supply protected against polarity reversal?
  Yes, reverse polarity protection is built in.
• What is the warranty?
  12-month warranty against manufacturing defects.
• How fast is shipping?
  We dispatch within 12–24 hours after order confirmation.
• Which couriers do you use?
  We ship via FedEx, UPS, and DHL for global delivery.

Selection Guide

• For small logic control – this CPU is ideal.
• For high-speed counting – use the 6 onboard inputs (up to 100 kHz).
• For analog signals – the 2 AI (0-10V) are sufficient for most sensors.
• For network integration – PROFINET supports up to 16 IO devices.
• Check ambient temperature – vertical mount limits to 50°C.

Contact us:
sales@powergearx.com |
+86 18030005825 (WhatsApp)

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