Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
This is a Siemens 6AV7874-0BA20-0AC0, a SIMATIC Panel PC 677B designed for industrial human-machine interface (HMI) and control applications. It features a 17-inch touchscreen display with a 1280 x 1024 resolution, powered by an Intel Celeron M440 1.86 GHz processor. The unit is equipped with 1 GB of DDR2 RAM and a 160 GB SATA hard drive. Connectivity options include dual Gigabit Ethernet, multiple USB 2.0 ports, a serial port, and an integrated PROFIBUS/MPI interface with 2MB of buffered SRAM. This model is configured with a 110/230 V AC power supply and comes pre-installed with Windows XP Professional MUI.
| Specification | Value |
|---|---|
| Manufacturer | Siemens |
| Product Series | SIMATIC Panel PC 677B |
| Product Type | PC Panel |
| Display | 17-inch Touchscreen |
| Resolution | 1280 x 1024 pixels |
| Processor | Intel Celeron M440, 1.86 GHz |
| Processor Cache | 1 MB SLC |
| Memory (RAM) | 1 GB DDR2 |
| Storage | 160 GB SATA HDD (3.5-inch) |
| Optical Drive | Not included |
| Ethernet Ports | 2 x 10/100/1000 Mbit/s |
| USB Ports | 4 x USB 2.0 (rear), 1 x USB (front) |
| Serial Port | 1 x COM1 |
| Fieldbus Interface | PROFIBUS/MPI with 2MB Buffered SRAM |
| Expansion Slots | 2 x PCI |
| Power Supply | 110/230 V AC, NAMUR compliant |
| Included Cable | Europe Power Supply Cable |
| Operating System | Windows XP Professional MUI (de, en, fr, es, it, ja, zh, ko) |
| Product Lifecycle Status | Obsolete |
| Country of Origin | Germany (Estimate) |
| Shipping Weight | 12.00 kg |
| Package Dimensions (Source) | 35.0 x 25.0 x 25.0 cm |
CRITICAL WARNING
Failure to ensure adequate ventilation clearance around the unit can lead to overheating, component failure, and system shutdown. Maintain specified clearances on all sides as per the enclosure design. Disconnect all power sources before installation or maintenance.
Global Express Shipping
Returns & Warranty

This is a Siemens 6AV7874-0BA20-0AC0, a SIMATIC Panel PC 677B designed for industrial human-machine interface (HMI) and control applications. It features a 17-inch touchscreen display with a 1280 x 1024 resolution, powered by an Intel Celeron M440 1.86 GHz processor. The unit is equipped with 1 GB of DDR2 RAM and a 160 GB SATA hard drive. Connectivity options include dual Gigabit Ethernet, multiple USB 2.0 ports, a serial port, and an integrated PROFIBUS/MPI interface with 2MB of buffered SRAM. This model is configured with a 110/230 V AC power supply and comes pre-installed with Windows XP Professional MUI.
| Specification | Value |
|---|---|
| Manufacturer | Siemens |
| Product Series | SIMATIC Panel PC 677B |
| Product Type | PC Panel |
| Display | 17-inch Touchscreen |
| Resolution | 1280 x 1024 pixels |
| Processor | Intel Celeron M440, 1.86 GHz |
| Processor Cache | 1 MB SLC |
| Memory (RAM) | 1 GB DDR2 |
| Storage | 160 GB SATA HDD (3.5-inch) |
| Optical Drive | Not included |
| Ethernet Ports | 2 x 10/100/1000 Mbit/s |
| USB Ports | 4 x USB 2.0 (rear), 1 x USB (front) |
| Serial Port | 1 x COM1 |
| Fieldbus Interface | PROFIBUS/MPI with 2MB Buffered SRAM |
| Expansion Slots | 2 x PCI |
| Power Supply | 110/230 V AC, NAMUR compliant |
| Included Cable | Europe Power Supply Cable |
| Operating System | Windows XP Professional MUI (de, en, fr, es, it, ja, zh, ko) |
| Product Lifecycle Status | Obsolete |
| Country of Origin | Germany (Estimate) |
| Shipping Weight | 12.00 kg |
| Package Dimensions (Source) | 35.0 x 25.0 x 25.0 cm |
CRITICAL WARNING
Failure to ensure adequate ventilation clearance around the unit can lead to overheating, component failure, and system shutdown. Maintain specified clearances on all sides as per the enclosure design. Disconnect all power sources before installation or maintenance.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Germany
|