Siemens 545-1106 CPU Module

Description

Siemens 545-1106 CPU Module

Product Dimensions：

The Siemens 545-1106 is a robust, legacy Programmable Logic Controller (PLC) CPU module from the classic SIMATIC TI505 (Texas Instruments 505) series. Originally designed by Texas Instruments and later acquired/supported by Siemens, the 545-1106 is highly regarded for its reliability in managing complex discrete and analog control systems.

Product Detailed Description

The 545-1106 CPU module serves as the primary processing brain for the SIMATIC 505 rack system. It executes Relay Ladder Logic (RLL) programs, processes proportional-integral-derivative (PID) loop calculations, and handles mathematical algorithms.

Unlike older legacy controllers, the 545-1106 is particularly distinguished by its integrated PROFIBUS-DP support built directly onto the mainboard, enabling seamless communication with decentralized I/O networks without the need for an external interface module.

Technical Parameters

Product Advantages

• Native PROFIBUS-DP Port: The direct on-board integration of PROFIBUS-DP eliminates the cost and footprint of separate communication cards, allowing rapid setup of remote I/O lines.
• Excellent PID & Loop Functions: Inherited from the renowned Texas Instruments architecture, this CPU is legendary for its execution of complex analog, loop-control, and math-heavy special function programs (SFPGMs).
• Maintenance-Friendly Design: Features a front-accessible battery compartment. This allows the backup battery to be changed while the system is powered up and running, avoiding unnecessary downtime or the risk of memory loss.
• Non-Volatile Storage: The integrated user Flash EEPROM ensures that your critical control programs are securely saved even during long-term power outages without relying solely on the battery.
• Industrial Durability: Built to endure harsh control room and factory floor environments, maintaining a track record of decades-long continuous operation.

Important Considerations (Precautions)

• Status Lifecycle (Obsolete/Legacy): The SIMATIC TI505 system, including the 545-1106, is discontinued by the manufacturer. While spare parts and refurbished units are widely available in the secondary market, system planning should account for long-term migration to active families (e.g., SIMATIC S7-1500).
• Battery Replacement Rule: Ensure the PLC is powered on when replacing the front-accessible battery. Replacing the battery while the power supply is off can lead to the immediate loss of volatile SRAM memory (user program and register data).
• Configuration Tools: Programming and diagnostics require legacy software such as TISOFT (DOS-based) or modern third-party suites like FasTrak’s PLC WorkShop for Siemens 505.
• Profibus Role: The integrated PROFIBUS-DP on the 545-1106 functions strictly as a Master node on the network.

Product Applications

The Siemens 545-1106 CPU is heavily utilized in legacy industrial and process-heavy automation systems:

• Chemical & Petrochemical Processing: Managing complex PID loop calculations for temperature, pressure, and flow control.
• Water and Wastewater Plants: Overseeing remote pump station telemetry, chemical dosing, and filtration logic via PROFIBUS networks.
• Food & Beverage Industry: Executing recipe management, heating cycles, and packaging lines using Special Function Programs (SFPGMs).
• Legacy Machine Retrofits: Keeping reliable, heavy-duty manufacturing and metal-forming machinery operating smoothly without the high cost of a complete system rewiring.

Shipping Port: Xiamen, China

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