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Designed for the Simatic TI 305 platform, Siemens 305-55N is an Input Module.
Within the process-control arrangement, a digital input module receives discrete on/off states from field contacts and devices, then makes those states available to the controller for monitoring, sequencing, alarms, and interlocks. Existing connection and module records should guide replacement work.
Simatic TI 305 provides the platform context for this product, while the PLC modules classification identifies its broader automation role. Exact application should follow the installed system configuration. Exact operating details should be taken from the installed model documentation.
For maintenance or replacement work, the exact module designation should be checked against the installed hardware, wiring records, and control-system documentation before the component is placed into service. Connection and configuration should follow the requirements of the platform.
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