| Product Type | S7-1200 Communication Module |
| Product Model | 6ES7278-4BD32-0XB0 |
| Power Loss | Power Loss, Typical Value 1 W |
| Product Dimensions | 45 MM × 100 MM × 75 MM |
| Power Supply Voltage | Rated value (DC) 24 V Allowable range, lower limit (DC) 20.4 V Allowable range, upper limit (DC) 28.8 V |
| Weight | 150 g |
Signal Board for S7-1200 Series: Model 6ES7278-4BD32-0XB0, this is a signal board (SB) for the SIMATIC S7-1200 PLC system that mounts directly on the CPU, enabling functional expansion without using up module slots.
2-Channel Digital Output (Transistor Type): Provides 2 channels of 24V DC PNP (source-type) digital outputs, ideal for controlling small loads such as indicator lights, relays, or solenoid valves—enhancing system integration.
Compact Design Saves Space: Plugs directly into the front-side expansion connector of S7-1200 CPUs, requiring no additional DIN rail space—perfect for space-constrained control cabinets.
Plug-and-Play Installation: No external power or terminal blocks required; connects directly to the CPU backplane, simplifying wiring and reducing installation time and cost.
Supports High-Speed Pulse Output (PTO): Can be used for high-speed pulse generation, suitable for motion control applications such as stepper motor control or precise timing signals.
Seamless Integration with TIA Portal: Automatically detected and configurable in Siemens TIA Portal, enabling unified programming, diagnostics, and monitoring—improving engineering efficiency.
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