Distributed I/O Link for ET 100U Systems
The 6ES5318-8MA12 acts as a dedicated Connection 318 interface module within the SIMATIC S5 architecture. Engineers deploy this component to link ET 100U distributed I/O stations with central controllers. Consequently, the module enables flexible cabinet layouts while maintaining synchronized data exchange across the network.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6ES5318-8MA12 |
| Manufacturer | Siemens |
| Series | SIMATIC S5 |
| Module Type | Connection 318 Interface |
| Compatible System | ET 100U Distributed I/O |
| Communication Protocol | SINEC L1 Serial Bus |
| Data Transfer Rate | Up to 187.5 kbit/s |
| Maximum Cable Length | 1000 meters (shielded twisted-pair) |
| Operating Voltage | 24V DC |
| Power Consumption | Typically 1.5W from backplane |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +70°C |
| Protection Rating | IP20 |
| Weight | Approximately 0.45 kg |
Functional Architecture
This interface module transmits internal S5 backplane signals to remote expansion racks. Therefore, engineers can place I/O modules closer to field instrumentation without long sensor runs. The 6ES5318-8MA12 supports hot-swap capability for minimal downtime during maintenance operations. Diagnostic LEDs provide immediate status feedback for bus health and power conditions.
Integration and Compatibility
The module works seamlessly with S5-115U, S5-135U, and S5-155U controllers. Galvanic isolation between bus segments protects sensitive central electronics from voltage transients. Additionally, the unit requires a matching receiver module in the expansion rack to complete the distributed link.
Details
| Weight | 0.5 kg |
|---|---|
| Dimensions | 250 × 25 × 210 mm |



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