How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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The Siemens 6ED1055-5MC08-0BA2 is a LOGO! CIM communication interface module for LOGO! 8, adding a Modbus RTU RS232/485 interface alongside a 4-port Ethernet switch. It accepts 12 V DC, 24 V DC, or 12/24 V AC/DC supply, draws up to 1 A, and includes 2 MB NOR flash storage with a web configurator for setup and diagnostics.
The CIM adds Modbus RTU master/slave connectivity and a 4-port Ethernet switch to a LOGO! 8 station without occupying the base module's own network port, and its empty mini PCIe socket accepts an optional 4G/LTE/GPS card for remote-site installations (not fitted on this order number). Its Modbus interface makes it the module to add when third-party RS232/485 devices need to exchange data with the LOGO! program alongside standard LOGO! Ethernet traffic.
| Firmware version | V1.1 |
|---|---|
| FW update possible | Yes |
| Mounting | on 35 mm DIN rail, 4 spacing units wide |
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| Rated value (DC) | 24 V; 12 V DC, 12/24 V AC/DC |
|---|---|
| 12 V DC | Yes |
| 24 V DC | Yes |
| permissible range, lower limit (DC) | 10.2 V |
| permissible range, upper limit (DC) | 28.8 V |
| Rated value (AC): 24 V AC | No |
| Part number | 6ED1055-5MC08-0BA2 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4034106034405 |
| Current consumption, max. | 1 A |
|---|
| Flash | Yes; 2 MB NOR flash |
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| Clock synchronization: supported | Yes |
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| Number of industrial Ethernet interfaces | 4; 4 ports (switch) |
|---|---|
| Number of other interfaces | 1; mini PCIe interface for 4G module |
| Web server: supported | Yes |
|---|
| S7 basic communication: supported | Yes |
|---|---|
| LOGO! communication: supported | Yes |
| Diagnostics indication LED: RUN/STOP LED | Yes |
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| Emission of radio interference acc. to EN 55 011: Limit class B, for use in residential areas | Yes |
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| CE mark | Yes |
|---|---|
| UL approval | Yes |
| cULus | Yes |
| FM approval | Yes |
| RCM (formerly C-TICK) | Yes |
| KC approval | Yes |
| EAC (formerly Gost-R) | Yes |
| developed in accordance with IEC 61131 | Yes |
| according to VDE 0631 | No |
| Marine approval | No |
| Ecological footprint: environmental product declaration Global warming potential | Yes |
| Ecological footprint: global warming potential, (total) [CO2 eq] | 208 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 6.99 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 201 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.124 kg |
| Ambient temperature during operation: min. | -20 °C |
|---|---|
| Ambient temperature during operation: max. | 55 °C |
| Ambient temperature during storage/transportation: min. | -40 °C |
| Ambient temperature during storage/transportation: max. | 70 °C |
| Relative humidity: Operation, max. | 95 %; no condensation |
| Width | 71.5 mm |
|---|---|
| Height | 90 mm |
| Depth | 58.5 mm; without antenna sockets |
| Weight, approx. | 200 g |
|---|
| Net weight | 0.227 kg |
|---|---|
| Country of origin | CN |
| Shipping weight | 0.727 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of 6ED1055-5MC08-0BA2 is 1 A.
The rated operational voltage of 6ED1055-5MC08-0BA2 is 24; 12, 12–24–DC V DC.
The tariff (HS) code on file for 6ED1055-5MC08-0BA2 is 85176200.
The EAN (GTIN) of 6ED1055-5MC08-0BA2 is 4034106034405.
6ED1055-5MC08-0BA2 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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