Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Siemens 6DS1220-8AA |
| Manufacturer | Siemens AG |
| Product Type | N8-H Local Bus Interface Module |
| Series | TELEPERM M / TELEPERM ME |
| Type Designation | N8-H Local Bus Interface |
| Supply Voltage | DC 24V (typical range 20.4V – 28.8V) |
| Power Consumption | ≤ 4.5W |
| Data Transfer Rate | 1.5 Mbps (typical, configurable) |
| Data Bus Type | 8-bit parallel N8-H Local Bus |
| Communication Protocol | TELEPERM M Proprietary Protocol / PROFIBUS-DP |
| Number of Channels | 8 channels |
| Maximum Nodes | Up to 31 slave stations (configuration dependent) |
| Maximum Transmission Distance | 500 meters (without repeater) |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +70°C |
| Protection Class | IP20 |
| Dimensions | Approx. 90mm × 100mm × 60mm |
| Weight | 0.2 – 0.34 kg |
| Mounting | Rack slot / Backplane connection |
| Status Indicators | RUN, FAULT, BUS ACTIVE, DATA TX/RX |
| Certifications | CE, UL, RoHS |
Main Features and Advantages
The Siemens 6DS1220-8AA delivers exceptional value through its proven communication architecture and robust design. As a dedicated N8-H local bus interface, the Siemens 6DS1220-8AA employs a deterministic master-slave polling mechanism that ensures real-time, predictable data transmission. This is critical for process control applications where timing and reliability are paramount. The Siemens 6DS1220-8AA is engineered with high-quality components and stringent component screening, providing outstanding immunity to electromagnetic interference, temperature fluctuations, and humidity. This ruggedness allows the Siemens 6DS1220-8AA to maintain stable data transfer even in challenging industrial settings such as turbine halls or chemical processing areas, where communication integrity is frequently compromised by environmental noise.
Another key advantage of the Siemens 6DS1220-8AA is its seamless integration into the TELEPERM M ecosystem. The module provides galvanic isolation between the local bus and the system backplane, protecting sensitive control logic from field-side disturbances. The Siemens 6DS1220-8AA supports redundant bus configurations, allowing system architects to implement fault-tolerant communication paths that maintain operation even in the event of a single point of failure. Built-in diagnostic LEDs on the Siemens 6DS1220-8AA provide immediate visual feedback on module health, bus activity, and communication status, significantly reducing troubleshooting time and mean time to repair (MTTR). For facilities operating legacy TELEPERM M systems, the Siemens 6DS1220-8AA is an essential component for extending equipment life, as it enables continued operation without the need for a costly and disruptive full system migration. The module’s compact design and backplane power supply make installation straightforward, while its compatibility with shielded twisted-pair cabling supports installations up to 500 meters without repeaters.
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