Product Overview

The SIEMENS 6DD1688-0AD0, also designated as 6DD1 688-0AD0, is a specialized communication submodule belonging to the SIMADYN D digital control system family, one of Siemens’ most robust and high-performance automation platforms . This submodule, identified as type SS4 and designed for use with the CS7 communication processor, serves as a critical interface for data exchange within the SIMADYN D architecture and with external automation systems . Its primary role is to enable efficient and reliable communication between various control modules, drive units, and higher-level network infrastructures, ensuring seamless information flow in complex industrial control environments.

The SIEMENS 6DD1688-0AD0 is engineered to support the SIMADYN D DUST 1, 2, 3, and 7 protocols, facilitating versatile connectivity options that are essential for the flexible, modular configuration of high-performance drive and technology control systems . As a submodule for the CS7 processor, it acts as a dedicated communication expansion component, enabling the central processing unit to communicate with other nodes on the bus system, including SINEC L2 DP networks . Its robust design, featuring an EIA-485 (RS485) serial interface, ensures reliable data transmission even in harsh industrial settings . With an operating temperature range of -25°C to +70°C and weight of approximately 0.196 kg, the SIEMENS 6DD1688-0AD0 is built for long-term deployment in mission-critical applications like rolling mills, power generation, and high-dynamic testing stands . Although classified as an End-of-Life (EOL) product since 2017, the 6DD1688-0AD0 remains a vital spare part for maintaining the operational continuity of legacy SIMADYN D installations worldwide .

 

Technical Specifications

Parameter Name	Value
Product Model	6DD1688-0AD0
Manufacturer	SIEMENS
Product Type	Communication Submodule (SS4 for CS7)
System Compatibility	SIMADYN D / SIMATIC TDC
Supported Protocols	DUST 1, 2, 3, 7; SINEC L2 DP
Interface Type	EIA-485 (RS485)
Operating Voltage	24 V DC (typical)
Current Consumption	< 20 mA at nominal load
Data Transfer Rate	Up to 12 Mbit/s (Profibus DP compatible)
Operating Temperature Range	-25°C to +70°C
Storage Temperature Range	-40°C to +85°C
Protection Class	IP20
Net Weight	Approx. 0.196 kg
Packaging Dimensions (L x W x H)	24.00 × 10.80 × 6.30 cm
Product Lifecycle Status	End of Product Lifecycle (since 01.10.2017)
Export Control (AL/ECCN)	AL: N / ECCN: N
RoHS Compliance	Not Compliant
Country of Origin	Germany

 

Main Features and Advantages

Dedicated Communication Expansion for SIMADYN D Systems: The SIEMENS 6DD1688-0AD0 is purpose-built as an SS4 submodule for the CS7 communication processor, providing the SIMADYN D system with essential expansion capabilities for high-speed data exchange . This specialized function allows the core processor to manage multiple communication tasks simultaneously, ensuring that control loops and drive commands are executed without latency. The 6DD1688-0AD0 effectively acts as a gateway, bridging the internal system bus with external field devices and networks, thereby enhancing the overall flexibility of the automation architecture.

Multi-Protocol Support and High-Speed Data Transfer: A key strength of the SIEMENS 6DD1688-0AD0 is its support for the DUST 1, 2, 3, and 7 protocols, a suite of communication standards developed specifically for the SIMADYN D ecosystem . This compatibility ensures that the 6DD1688-0AD0 can interface with a wide array of modules and peripherals within the system. Furthermore, with a data transfer rate of up to 12 Mbit/s, the submodule guarantees fast and deterministic communication, a critical requirement for time-sensitive applications such as high-dynamic drive control and real-time process monitoring . The module’s RS485 interface provides a robust physical layer for industrial networks, offering excellent noise immunity for long-distance transmissions .

Compact, Rugged, and Reliable for Harsh Environments: Engineered to withstand the rigors of heavy industry, the SIEMENS 6DD1688-0AD0 features a compact and robust design with an IP20 protection class and a wide operating temperature range of -25°C to +70°C . Its lightweight construction (approx. 0.196 kg) and manageable dimensions (24 × 10.8 × 6.3 cm) allow for easy integration into crowded control cabinets without the need for extensive modifications . The 6DD1688-0AD0 is built with high-quality components, ensuring long-term reliability and resistance to the effects of vibration, temperature fluctuations, and electromagnetic interference typical of steel mills and power plants .