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This Siemens communications processor connects S5 automation systems to PROFIBUS networks. The Siemens 6GK1543-0AA01 enables efficient data exchange between controllers and field devices. Its dedicated design offloads communication tasks from the central CPU. This module supports distributed I/O and system integration applications.
Physical Dimensions and Mounting Specifications
The communications processor measures 232 mm in height and 25 mm in width. Its overall depth reaches 160 mm including the front connector. This unit weighs approximately 0.52 kilograms for stable rack installation. The housing supports standard 35 mm DIN rail mounting in S5 racks. The Siemens 6GK1543-0AA01 features a 20-pin front connector for all signal wiring. A 9-pin D-sub connector provides the PROFIBUS network interface.
Network and Communication Specifications
This processor supports PROFIBUS DP with baud rates up to 1.5 Mbit/s. It operates as a master on the PROFIBUS network for efficient control. The module handles up to 64 slave devices in a single network segment. It manages 512 bytes of input and 512 bytes of output data. The Siemens 6GK1543-0AA01 includes integrated diagnostics for network monitoring. A built-in termination resistor ensures signal integrity at the cable end. LED indicators display network status and communication activity.
Electrical Characteristics and Memory
The unit draws a typical current of 220 mA from the 24 V DC supply. It includes a 470 µF capacitor for energy storage during brief interruptions. This capacitor maintains operation during momentary power dips. The Siemens 6GK1543-0AA01 provides 64 KB of RAM for communication buffers. An integrated EPROM stores the communication firmware. The module features galvanic isolation for the network interface.
Detailed Specification Table
| Parameter | Specification |
|---|---|
| Dimensions (H x W x D) | 232 mm x 25 mm x 160 mm |
| Weight | Approx. 0.52 kg |
| Network Protocol | PROFIBUS DP |
| Baud Rate | Up to 1.5 Mbit/s |
| Operating Mode | Master |
| Maximum Slaves | 64 |
| Input Data Capacity | 512 bytes |
| Output Data Capacity | 512 bytes |
| Supply Voltage | 24 V DC |
| Current Consumption | 220 mA (typical) |
| Energy Storage Capacitance | 470 µF |
| RAM Capacity | 64 KB |
| Network Interface | 9-pin D-sub |
| Isolation | Galvanic |
| Operating Temperature | 0°C to 60°C |
Application and Commissioning Guidelines
Mount this module in any available slot of the S5 rack system. Connect the PROFIBUS cable to the 9-pin D-sub connector securely. Set the station address using the DIP switches on the module. The Siemens 6GK1543-0AA01 operates effectively between 0°C and 60°C. Configure the communication parameters using the STEP 5 software. Select the appropriate baud rate for network compatibility. Terminate the bus at both ends for reliable signal transmission. Monitor the LEDs to verify network connectivity.