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The Siemens 6ES7212-1BB22-0XB0 CPU operates as the core controller for the SIMATIC S7-200 micro PLC system. This compact unit integrates the processor, power supply, and I/O into a single device. The controller manages small automation tasks with reliable performance and straightforward programming.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Compact CPU controller |
| Model | CPU 212-1BB22 (Relay outputs) |
| Program Memory | 2 KB (integrated) |
| Data Memory | 1 KB (integrated) |
| Digital Inputs | 8 x 24V DC (sink/source) |
| Digital Outputs | 6 x 24V DC / 2A (relay) |
| Total I/O Points | 14 I/O (8 IN / 6 OUT) |
| Expandable I/O | Up to 2 expansion modules |
| Communication Port | 1 x RS-485 (PPI, MPI) |
| Built-in Features | 2 x timers, 1 x counter (hardware) |
| Processing Time (bit) | 0.37 µs (typical) |
| Dimensions (W x H x D) | 140 x 80 x 62 mm |
| Weight | 0.39 kg |
| Internal Components | 1 x CPU core, 6 x relays, 1 x power supply, 1 x UART |
| Energy Storage | SuperCap (100h, real-time clock backup) |
| Power Supply | 24V DC (20.4V – 28.8V) |
| Power Consumption | 10W (typical) |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Protection Class | IP20 |
| Mounting | DIN rail or panel |
| Approvals | CE, UL, CSA |
Integrated I/O for Basic Control Applications
The Siemens 6ES7212-1BB22-0XB0 includes 8 digital inputs and 6 relay outputs onboard. This built-in I/O covers typical small-machine control requirements. The 24V DC inputs accept signals from pushbuttons, switches, and sensors. The relay outputs switch 2A loads for contactors, solenoids, and indicator lamps.
Relay Outputs for Versatile Load Switching
This CPU features six relay outputs rated at 24V DC and 2A per contact. These outputs handle both AC and DC loads for maximum application flexibility. The relays provide complete electrical isolation between the PLC and field circuits. Users can switch inductive or resistive loads without external interface relays.
Compact Size for Space-Sensitive Installations
The CPU measures 140 x 80 x 62 mm and weighs only 0.39 kg. This compact footprint fits easily into small control cabinets and machinery enclosures. The unit mounts on standard DIN rails or directly to backplates. Users can install the controller in tight spaces without compromising accessibility.
Expansion Capability for Growing Systems
The controller supports up to 2 expansion modules for increased I/O capacity. This scalability allows the system to adapt to changing application needs. Users can add digital I/O, analog modules, or communication interfaces. The expansion bus connects through the side-mounted interface with simple plug-in installation.
Reliable SuperCap Energy Storage
A SuperCap provides 100 hours of data retention and real-time clock backup. This energy storage preserves critical parameters during short power interruptions. The real-time clock ensures accurate time-stamped events and scheduled operations. Users do not require a separate battery for basic data protection.
Straightforward Programming with STEP 7 Micro/WIN
Users program this CPU using STEP 7 Micro/WIN software for simple ladder logic. The programming environment offers intuitive tools for small to medium applications. The RS-485 port connects the CPU to the programming device. Users can also interface with HMIs and other PLCs via the communication port.