Siemens 6ED1055-1CB10-0BA2: Compact I/O, Practical Expansion

For many machine builders, the answer is not necessarily a new controller. Sometimes the more practical approach is to extend the existing system with the right I/O module. The Siemens 6ED1055-1CB10-0BA2 is designed precisely for this kind of requirement.

Siemens identifies the unit as the LOGO! DM16 24 expansion module for LOGO! 8, providing 8 digital inputs and 8 digital outputs. The module operates on 24 V DC and uses transistor outputs, making it a compact option for machines and control panels that rely heavily on discrete signals.

How Does the 6ED1055-1CB10-0BA2 Expand a LOGO! 8 System?

The most obvious advantage is the additional I/O capacity.

The module adds 16 digital points in total: eight inputs for receiving field signals and eight transistor outputs for controlling suitable loads. Siemens specifies a supply range of 20.4 to 28.8 V DC, with input “0” below 5 V DC and input “1” above 12 V DC.

The maximum input delay is 1.5 ms for both signal transitions, providing a clearly defined response characteristic for digital signals.

On the output side, each transistor output is rated at 0.3 A. The outputs also feature short-circuit protection, while Siemens specifies a maximum switching frequency of 10 Hz for resistive loads.

These specifications make the 6ED1055-1CB10-0BA2 particularly relevant where a LOGO! 8 installation needs additional 24 V DC digital I/O rather than a complete change of control platform.

Why Does the Physical Design Matter for Machine Builders?

A useful I/O module is not only about electrical specifications. How much cabinet space does the 6ED1055-1CB10-0BA2 require?

The module is designed for 35 mm DIN-rail mounting and occupies 4 spacing units. Siemens lists dimensions of approximately 71.5 mm × 90 mm × 58 mm.

For compact machine cabinets, this relatively small footprint can be important. Adding 16 I/O points does not necessarily mean adding a large amount of hardware or redesigning the existing cabinet.

Key Technical Data

Where Does the 6ED1055-1CB10-0BA2 Fit?

The module is well suited to compact automation applications where discrete signals dominate. Sensors, switches, machine-status signals and suitable 24 V DC actuators can all form part of the wider I/O environment.

It can also be useful when an existing machine gradually expands. Instead of replacing the LOGO! 8 controller simply because the available I/O has been exhausted, an expansion module can provide additional capacity while preserving the existing control concept.

For maintenance teams, the same product can be relevant as an automation spare part. When an installed I/O module fails, checking the exact article number, output technology, voltage range and current rating is essential before ordering a replacement.

Siemens currently lists the 6ED1055-1CB10-0BA2 as a PM300: Active Product, which is also useful information when planning spare-part inventories for existing LOGO! 8 installations.

Conclusion

The Siemens 6ED1055-1CB10-0BA2 takes a straightforward approach to I/O expansion: 8 digital inputs, 8 transistor outputs and 24 V DC operation in a compact DIN-rail module.

Its 20.4–28.8 V DC supply range, 0.3 A output rating, 1.5 ms maximum input delay and short-circuit protection give engineers specific parameters to consider when designing or maintaining a LOGO! 8 system.

For machine builders, it can provide the extra I/O needed without unnecessary redesign. For maintenance departments, keeping the correct module among automation spare parts can make replacement work considerably more direct.

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