Siemens 6GK1561-1AA01 Communication Processor

PROFIBUS Network Interface for Industrial Automation

The Siemens 6GK1561-1AA01 communication processor connects PCs and SIMATIC S5 systems to PROFIBUS networks. This module handles all bus access protocols, enabling seamless data exchange between automation devices. Modern industrial networks require reliable interfaces, and this unit delivers that performance consistently.

Processing Performance and Protocol Handling

This communication processor features a dedicated microcontroller managing all PROFIBUS DP protocol overhead. The module integrates 64 KB of dual-port RAM for efficient data exchange with the host system. An additional 16 KB of flash memory stores the firmware and network configuration. Furthermore, the processor supports both master and slave operation modes for flexible deployment.

Parameter	Specification
Model	Siemens 6GK1561-1AA01
Processor Type	Dedicated microcontroller
Dual-Port RAM	64 KB
Firmware Flash	16 KB
Protocol Support	PROFIBUS DP (V0, V1)
Transmission Rate	9.6 kbps to 12 Mbps
Interface Type	RS-485 (9-pin D-sub)
Host Interface	ISA (16-bit)
Galvanic Isolation	1500 V AC
Dimensions (W x H x D)	90 mm x 60 mm x 15 mm
Weight	0.15 kg
Power Consumption	5 V DC at 500 mA
Operating Temperature	0°C to 55°C

PROFIBUS DP Features and Functionality

The Siemens 6GK1561-1AA01 supports PROFIBUS DP with diagnostic and parameterization services. The module handles cyclic data exchange with up to 122 bytes of input and 122 bytes of output data. Integrated watchdog timers monitor the communication link and trigger safe-state responses. Additionally, the processor supports acyclic data services for parameterization and diagnostics.

Host Interface and Data Buffering

This communication processor connects to the host system through a 16-bit ISA interface. The 64 KB dual-port RAM buffers all incoming and outgoing PROFIBUS messages. The host accesses the RAM directly, minimizing data transfer latency. Moreover, the module provides interrupt signals for efficient data handling by the host application.

Installation and Configuration

You can install this communication processor in any standard ISA slot in an industrial PC. The module automatically configures its I/O address and interrupt using the Plug and Play protocol. For legacy systems, manual jumper settings provide fixed resource allocation. Always install the appropriate driver software before connecting the module to the network.

Diagnostic Features and Status Indication

Front-panel LEDs indicate power, bus activity, and error conditions for immediate status assessment. The module stores the last 64 diagnostic events in a non-volatile buffer for offline analysis. A built-in self-test routine verifies the hardware integrity during system startup. Furthermore, the processor supports remote diagnostics through the PROFIBUS network.