Siemens 6GK1151-1AA00 Communication Processor SIMATIC S5

Technical Overview

The 6GK1151-1AA00 communication processor (CP) establishes a high-speed data link between SIMATIC S5 controllers and industrial Ethernet networks. This module enables seamless connectivity for factory-wide automation and process control systems. It supports data rates of up to 10 Mbps, ensuring efficient communication across various network topologies. Additionally, the CP integrates a built-in processor that handles protocol handling and data buffering independently. This offloads communication tasks from the main CPU, freeing its resources for core control functions.

Key Technical Specifications

Parameter	Specification
Brand	Siemens
Model Number	6GK1151-1AA00
Product Type	Communication Processor
Series	SIMATIC S5 (Industrial Ethernet)
Transmission Rate	Up to 10 Mbps
Network Interface	15-pin Sub-D connector (AUI interface)
Protocol Support	ISO transport protocol (Layer 4), RFC 1006
SIMATIC S7 Compatibility	Supports ISO-on-TCP via RFC 1006 for data exchange with S7 systems
Approx. Current Consumption	0.8 A (from backplane bus)
Approx. Weight	0.5 kg

Advanced Communication Capabilities

The 6GK1151-1AA00 supports the ISO transport protocol (Layer 4) for reliable data exchange across industrial networks. Moreover, it implements RFC 1006 for ISO-on-TCP communication, enabling seamless interaction with modern SIMATIC S7 systems . This protocol compatibility bridges the gap between legacy and contemporary Siemens automation platforms.

Built-in Processor and Data Buffering

An onboard processor handles network protocol processing independently from the main CPU. This module features a comprehensive data buffering mechanism that temporarily stores incoming messages . Consequently, the central CPU remains dedicated to executing user programs without communication delays. Additionally, this architecture supports efficient data flow even during peak network activity.

Network Connectivity and Integration

Users connect the 6GK1151-1AA00 to thick-wire Ethernet trunks via its 15-pin Sub-D AUI connector. This module works with standard AUI cables and external transceivers for versatile network topologies. It operates effectively within both bus and star configurations commonly found in industrial environments.

System Compatibility

This communication processor integrates directly into SIMATIC S5 central racks and expansion units. It fits into standard S5 module slots and receives power through the rack’s backplane bus. Engineers can configure the CP using Siemens COM software or STEP 5 applications.