Product Introduction
The Siemens 6ES7212-1AE40-0XB0 is a compact CPU from the SIMATIC S7-1200 series, designed for DC-powered automation systems. It integrates 8 digital inputs, 6 digital outputs, and 2 analog inputs, making it ideal for space-constrained control cabinets. With firmware V4.6 and support for STEP 7 V18, this module provides a modern upgrade path for legacy controllers.
Technical Specifications
The Siemens 6ES7212-1AE40-0XB0 offers the following key specifications:
| Parameter |
Value |
| Supply Voltage |
24 V DC (20.4–28.8 V) |
| Digital Inputs |
8 (24 V DC, source/sink) |
| Digital Outputs |
6 (24 V DC, 0.5 A each) |
| Analog Inputs |
2 (0–10 V, 10-bit) |
| Work Memory |
100 KB |
| Load Memory |
2 MB (expandable via SIMATIC Memory Card) |
| CPU Processing Time (bit) |
0.08 µs/instruction |
| Power Loss |
9 W typ. |
| Communication |
PROFINET (100 Mbit/s), OPC UA, MODBUS |
| Dimensions (WxHxD) |
90 x 100 x 75 mm |
| Weight |
approx. 370 g |
Additional features include 6 high-speed counters (100 kHz), 4 pulse-train outputs, and a built-in PID controller. The maintenance-free backup retains data without a battery.
Industry Applications
The Siemens 6ES7212-1AE40-0XB0 excels in applications requiring precise control and connectivity. Its six high-speed counters support accurate position monitoring, while the 4 pulse-train outputs enable stepper motor control. Typical uses include packaging machines, conveyor systems, and small assembly lines. For upgrade projects, this CPU replaces older S7-200 units with enhanced performance and network integration. Additionally, the built-in PID controller simplifies temperature and flow control loops.
Maintenance & Reliability
The Siemens 6ES7212-1AE40-0XB0 requires minimal maintenance due to maintenance-free backup without battery. It operates reliably from -20 to 60 °C (horizontal) and withstands vibration up to 2 g. IP20 protection allows use in clean industrial environments. Regular inspection of connections and ventilation is advised. With typical power loss of only 9 W, heat dissipation is low, extending component life.
Compatibility & Integration
This CPU communicates via PROFINET IO Controller/Device at 100 Mbit/s. It supports OPC UA Server for data exchange with higher-level systems, and MODBUS for legacy device integration. With up to 3 communication modules and 2 signal modules, the system scales to 16 distributed I/O devices. The onboard web server allows remote diagnostics. Note: PROFIBUS and AS-Interface require optional CMs.
Selection Guide
Before purchasing the Siemens 6ES7212-1AE40-0XB0, verify your power supply requirements: 24 V DC (20.4–28.8 V) with reverse polarity protection. Ensure adequate load memory via SIMATIC Memory Card if needed. For programming, use STEP 7 V18 or higher. This module is available from PLC Source PRO (ubest101.myshopify.com), a trusted supplier of automation spares.