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Engineered for SIMATIC S7-200 AS-Interface Networks
This processor manages AS-Interface communication for S7-200 PLCs. It provides reliable fieldbus connectivity for the Siemens 6GK1243-0SA20 unit. You will find this communication module in distributed automation systems. Unlike basic adapters, this version supports up to 62 slave devices. It handles both digital and analog I/O data exchange seamlessly.
Technical Specifications & Physical Dimensions
We designed this communication processor for industrial fieldbus applications. The table below presents all verified technical specifications.
| Parameter | Specification |
|---|---|
| Physical Dimensions (W x H x D) | 100mm x 100mm x 70mm |
| Total Weight | 0.35 kg (350 grams) |
| Communication Interface | RS485 (AS-Interface) |
| Transmission Speed | 167 kbps (standard AS-i) |
| Maximum Slave Devices | 62 digital or 31 analog slaves |
| Cycle Time | 5 ms for 62 slaves |
| Operating Voltage | 24V DC (20V – 30V) |
Functional Architecture and Network Integration
This processor connects directly to the AS-Interface yellow cable. It uses a dedicated AS-i chip for cycle management. You can connect sensors, actuators, and operator panels through this module. Moreover, the processor includes an integrated power supply for slave devices. This component provides up to 30V DC on the AS-i line. Consequently, you do not need external power for most field devices.
Installation and Operational Guidelines
The Siemens 6GK1243-0SA20 requires an external 24V DC supply for logic. It consumes only 100 mA of current during normal operation. You must terminate both ends of the AS-interface cable. Always use the yellow flat cable for network connections. This practice ensures proper signal propagation across the network. Furthermore, the processor supports auto-addressing for new slaves. This feature reduces commissioning time significantly.
Physical Characteristics and Environmental Limits
This communication processor has a compact, DIN-rail mountable housing. Its lightweight 0.35 kg design allows for easy installation. The layout follows Siemens standard S7-200 expansion module specifications. Therefore, it fits securely next to any S7-200 CPU. The module includes two LEDs for network status indication. In addition, it maintains stable operation between 0°C and 55°C ambient temperature. You can store this unit safely between -40°C and 70°C.