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Technical Overview of the ET 200S Electronic Submodule
The Siemens 6ES7123-1FB50-0AB0 electronic submodule functions as a mixed I/O unit within the SIMATIC ET 200S distributed I/O system. It combines four digital inputs and three digital outputs in a single compact housing. This module interfaces directly with the terminal module via a standardized backplane bus. Its design prioritizes space efficiency and simplifies wiring for control cabinet builders. Consequently, this submodule delivers a cost-effective solution for applications requiring both input and output capabilities.
Key Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Siemens |
| Model Number | 6ES7123-1FB50-0AB0 |
| Product Type | Electronic Submodule (Mixed I/O) |
| Input Channels | 4 Digital Inputs (Type 2 to IEC 61131) |
| Output Channels | 3 Digital Outputs (Transistor, PNP) |
| Input Voltage Range | 24 VDC (20.4 VDC to 28.8 VDC) |
| Output Current per Channel | 0.5 A (total output current limited) |
| Input Delay | Typ. 3 ms (configurable) |
| Output Short-Circuit Protection | Yes, electronic shutdown with auto-restart |
| Terminal Module Compatibility | TM-E15S23-01 or TM-E15N23-01 |
| Operating Temperature | -25°C to +55°C |
| Dimensions (W x H x D) | 15 mm x 81 mm x 52 mm |
| Weight | Approximately 0.045 kg |
| Protection Class | IP20 |
| Certifications | CE, cULus, ATEX (Zone 2) |
Functional Capabilities and Design Features
This submodule provides four isolated input channels with selectable delay times for noise filtering. Its three output channels feature built-in short-circuit protection and thermal overload shutdown. The module also supports redundant power supply via the backplane bus for increased system reliability. Furthermore, integrated diagnostic LEDs display operational status and fault conditions clearly. This design significantly reduces troubleshooting time during system commissioning.
Engineering and Application Context
The Siemens 6ES7123-1FB50-0AB0 fits seamlessly into the ET 200S station with a TM-E15S23-1 terminal module. Its narrow 15 mm width allows high-density mounting in control cabinets. The module’s wide temperature range supports outdoor or unheated enclosure installations. Ultimately, this submodule enhances system flexibility by providing mixed I/O functionality where space is limited.