The Siemens C79-458-L7000-B315 serves as a PC communication card for MPI and Profibus DP networks. This expansion card enables direct connectivity between industrial PCs and SIMATIC automation systems. The card supports both MPI (Multi-Point Interface) and Profibus DP protocols for versatile fieldbus integration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | PC communication card (PCI/ISA interface) |
| Supported Protocols | MPI, Profibus DP (FDL) |
| Transmission Rate | Up to 12 Mbps (automatic detection) |
| Bus Interface | 9-pin D-sub female connector |
| PC Interface | PCI 2.1 compliant (32-bit, 33 MHz) |
| Dimensions (W x H x D) | 120 x 90 x 21 mm |
| Weight | 0.15 kg |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -20°C to +70°C |
| Number of Components | 1 x ASIC, 2 x optocouplers, 1 x oscillator |
| Internal Buffer Memory | 8 KB (transmit), 8 KB (receive) |
| Power Consumption | 5V DC / 300 mA (from PCI bus) |
| Maximum Cable Length | 1.2 km (at 9.6 kbps), 100 m (at 12 Mbps) |
| Galvanic Isolation | 500V DC (between PC and fieldbus) |
| Drivers | Windows 2000/XP, Windows 7 (32-bit), Linux |
| Approvals | CE, UL, FCC Class A |
High-Speed Fieldbus Communication
The Siemens C79-458-L7000-B315 automatically detects transmission rates from 9.6 kbps up to 12 Mbps. This auto-baud feature simplifies configuration and ensures compatibility with existing Profibus networks. The card supports both MPI for Siemens S7-300/S7-400 programming and Profibus DP for distributed I/O communication. The 9-pin D-sub connector provides a standardized interface for fieldbus cabling.
Robust Isolation and Signal Integrity
Galvanic isolation of 500V DC separates the PC side from the fieldbus side of the card. This isolation protects the host computer from voltage spikes and ground loops common in industrial environments. Two optocouplers ensure reliable signal transfer between the bus and the PC’s PCI interface. A precision oscillator maintains accurate timing for high-speed data transmission.
Compact Design and Low Power Draw
The card measures 120 x 90 x 21 mm and weighs only 0.15 kg for easy installation. This low-profile design fits standard PCI slots in most industrial and office PCs. The card consumes just 300 mA from the 5V DC PCI bus supply. This minimal power draw generates little heat and does not stress the PC’s power supply.
Memory Buffering and Data Handling
Internal buffer memory of 8 KB for transmission and 8 KB for reception manages data flow efficiently. These buffers prevent data loss during high-speed communication bursts. The on-board ASIC handles protocol processing independently of the PC’s main CPU. This architecture offloads communication tasks and frees system resources for other applications.
Operating System Compatibility and Driver Support
The Siemens C79-458-L7000-B315 includes driver support for Windows 2000, XP, and 7 (32-bit versions). Linux drivers are also available for open-source industrial control platforms. The card operates reliably across a 0°C to +60°C temperature range. Users can choose cable lengths up to 1.2 km at lower baud rates.
Details
| Weight | 1.2 kg |
|---|---|
| Dimensions | 50 × 290 × 217 mm |
Reviews
There are no reviews yet.