This is a PROFIBUS DP slave interface module for the ET 200SP system. It serves as a key bridge between the flexible ET 200SP I/O modules and the traditional PROFIBUS network. With its high reliability, powerful diagnostic capabilities, and easy configuration, it has long been widely used in industrial automation.

Core Product Overview
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Product Name: IM 153-1 Interface Module
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System: SIMATIC ET 200SP
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Primary Function: To act as a PROFIBUS DP slave, connecting the ET 200SP distributed I/O station to a PROFIBUS-DP fieldbus network.
Detailed Product Description
1. Product Role and Position
The IM 153-1 interface module is the “brain” or “gateway” of an ET 200SP distributed I/O station. It is mounted at the far left end of the station (the start of the base unit assembly) and is responsible for:
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Network Communication: Exchanging data at high speed with the superior PROFIBUS master (e.g., an S7-300/400 PLC, S7-1500 PLC with DP interface) via its PROFIBUS-DP interface.
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Station Management: Managing all I/O modules in the station, packaging their input/output data, and cyclically transmitting it via the PROFIBUS network to and from the master.
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Power Distribution: Supplying the internal electronic power required for the subsequent I/O modules.
2. Key Features and Parameters
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Interface Type: PROFIBUS DP
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Protocol: Complies with PROFIBUS-DP V0/V1 standard.
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Baud Rate: Auto-sensing, up to 12 Mbps.
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PROFIBUS Address Setting: Set via the DIP switch on the module, range 1-126.
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Maximum I/O Capacity:
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Input Data: Up to 244 bytes
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Output Data: Up to 244 bytes
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(Total for the entire ET 200SP station)
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Maximum Number of Modules: One IM 153-1 can connect up to 32 I/O modules.
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Diagnostics: Supports powerful diagnostic functions (e.g., bus fault, station fault, module fault). Diagnostics are reported via LED indicators and PROFIBUS telegrams to the master for quick troubleshooting.
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Firmware Update: Supports online firmware updates without removing the module.
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Required Base Unit: Must be installed on a BU…P type base unit (e.g., BU15-P or BU20-P).
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Operating Mode: Pure DP Slave.
3. Product Appearance and Indicators
The module features several LED indicators for displaying operational status and diagnostics:
Typical Application Scenarios
The IM 153-1 is widely used in automation systems requiring distributed, modular I/O control, especially in:
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Factories that already use PROFIBUS-DP as their backbone network.
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Applications where large amounts of field signals (digital/analog) need to be collected from remote equipment and sent to a central controller.
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Systems where multiple distributed slaves are connected on a single PROFIBUS bus to save wiring costs and space.
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Examples: Automotive manufacturing, packaging machinery, conveyor systems, process control.
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