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Copy| Product Name | Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 | LOGO! DM8 Digital Expansion Modules |
| Item NO. | 2927541 |
| Weight | 0.1 kg = 0.2205 lb = 3.5274 oz |
| Category | SIEMENS |
| Brand | SIEMENS |
| Creation Time | 2026-10-27 |
Siemens · Industrial Automation
Three four-input/four-output expansions for different supply and output circuits.
Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 are LOGO! DM8 digital expansion modules, each adding four digital inputs and four digital outputs to a supported LOGO! base module. The shared channel count does not make their field circuits identical.
Siemens 6ED1055-1MB00-0BA2 is the 12/24R relay execution, Siemens 6ED1055-1HB00-0BA2 is the 24R relay execution, and Siemens 6ED1055-1CB00-0BA2 is the 24 V transistor-output execution. Supply voltage, input reference and output load wiring must therefore follow the exact article printed on the module.
Within the expansion chain, Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 transfer their I/O states through the LOGO! expansion interface. Module order and address assignment in the project must match the physical sequence before the added points can be diagnosed or controlled correctly.
| Technical Item | 6ED1055-1MB00-0BA2 | 6ED1055-1HB00-0BA2 | 6ED1055-1CB00-0BA2 |
|---|---|---|---|
| Brand | Siemens | ||
| Product Name | LOGO! DM8 12/24R | LOGO! DM8 24R | LOGO! DM8 24 |
| Country | Germany | ||
| Supply | 12/24 V DC | 24 V AC/DC | 24 V DC |
| Digital Inputs | 4 | ||
| Digital Outputs | 4 relay | 4 relay | 4 transistor |
| Output Circuit | Potential-free relay contacts | Potential-free relay contacts | 24 V DC transistor |
| Expansion Interface | LOGO! expansion bus | ||
| Status Indication | Channel LEDs | ||
| Permissible Supply Range | 10.8 to 28.8 V DC | 20.4 to 26.4 V AC; 20.4 to 28.8 V DC | 20.4 to 28.8 V DC |
| Input Frequency | Up to 4 Hz | ||
| Output Current | Up to 5 A per relay | Up to 5 A per relay | 0.3 A per transistor channel |
| Output Protection | External circuit protection required | External circuit protection required | Short-circuit and overload protected |
| Power Loss | Family-dependent 12/24 V relay execution | 1.0 to 2.6 W AC; 0.4 to 1.2 W DC | 0.6 to 1.0 W |
| Maximum Unshielded Input Line | 100 m | ||
| Operating Temperature | −20 to +55 °C | ||
| Mounting | 35 mm profile rail or wall mounting | ||
| Module Width | 2 spacing units | ||
| Dimensions (W × H × D) | 35.5 × 90 × 58 mm | ||
| Approximate Weight | 130 g | 130 g | 95 g |
Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 extend a LOGO! base module only when the physical order, project order and voltage domain agree. Integration starts by matching the DM8 execution to the field voltage and output technology, then preserving the expansion order from cabinet drawing to software project.
Select Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 from supply and output technology, not from the common DM8 channel count. Compare the exact article label with the circuit schedule and reject a same-size module when its relay or transistor output path does not match the load.
De-energize the assembly, couple the Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 expansion interface and confirm connector seating before rewiring field points. With power removed, seat the expansion connector, secure the module and label its physical position before reconnecting field conductors.
Insert Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 in the same logical position as the physical module, then verify addresses online. Mirror that position in the project, download the configuration and prove every added input and output against the terminal schedule.
Diagnose Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 by separating expansion-bus status, input sensing and output-load power. Troubleshooting should first decide whether the fault affects the complete expansion module, one input path or one powered output circuit.
If all points disappear, check coupling, supply and project order for Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 before tracing individual wires. When every point disappears, inspect base-module compatibility, expansion coupling, module supply and project order before tracing individual terminals.
Compare terminal voltage, channel LED and online state on Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 to locate the failed layer. For one input, compare terminal voltage, common reference, channel indication and online state to isolate wiring from addressing.
Protect each relay or transistor load connected to Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 according to its own circuit and inrush behavior. For one output, compare command, indication and measured load current; then inspect contact supply or transistor polarity and the external protection device.
Check power, expansion coupling and project order for Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 before investigating channel wiring.
For 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2, no direct assumption is valid: Siemens 6ED1055-1CB00-0BA2 has transistor outputs, while Siemens 6ED1055-1HB00-0BA2 has relay outputs and a different supply execution.
For 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2, measure the separately supplied contact circuit, protection and return connected to Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2.
For 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2, verify the Siemens 6ED1055-1CB00-0BA2 24 V supply, polarity, load return, project address and output command at the same time.
Power down, install the selected Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2 in the documented physical position, mirror that order in the project and test every added point.
Retain the exact article, base-module generation, physical order, I/O addresses, supply, output technology, load schedule and terminal labels for Siemens 6ED1055-1MB00-0BA2 / 6ED1055-1HB00-0BA2 / 6ED1055-1CB00-0BA2.
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