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.
The Siemens 6ED1052-2MD08-0BA2 is a LOGO! 12/24RCEO logic module running on 12/24 V DC, with 8 digital inputs (4 usable as 0-10 V analog inputs) and 4 relay outputs switching up to 10 A resistive. It has no onboard display, stores up to 400 function blocks, and includes an integrated Ethernet port with web server and MQTT cloud connectivity.
The RCEO suffix on this LOGO! variant means relay outputs, Ethernet, and no display - choose a module with a display built in if the panel needs local status/parameter viewing without a PC, or a transistor-output variant if outputs need to switch faster than relay contacts allow. Four of the eight digital inputs can be reconfigured as 0-10 V analog inputs, which covers simple process value monitoring (level, pressure, temperature transmitters) without adding a separate analog expansion module. The integrated web server and MQTT support let this module push status data to a local browser or a cloud broker without extra hardware.
Used as a standalone or networked small-machine controller for building services, pump/tank control, and simple process skids where a handful of relay outputs, analog inputs, and Ethernet-based monitoring cover the application without a full PLC.
| Mounting | on 35 mm DIN rail, 4 spacing units wide |
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| Rated value (DC): 12 V DC | Yes |
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| Rated value (DC): 24 V DC | Yes |
| permissible range, lower limit (DC) | 10.8 V |
| permissible range, upper limit (DC) | 28.8 V |
| Time switching clocks: Number | 400; Max. 400, function-specific |
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| Time switching clocks: Power reserve | 480 h |
| Part number | 6ED1052-2MD08-0BA2 |
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| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4034106034481 |
| ETIM class | EC001417 |
| eCl@ss | 27242216 |
| Number of digital inputs | 8; Of which 4 can be used in analog mode (0 to 10 V) |
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| Number of digital outputs | 4; Relays |
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| Short-circuit protection | No; external fusing necessary |
| Output current: for signal "1" permissible range for 0 to 55 °C, max. | 10 A |
| Relay outputs Switching capacity of contacts: with inductive load, max. | 3 A |
| Relay outputs Switching capacity of contacts: with resistive load, max. | 10 A |
| Emission of radio interference acc. to EN 55 011: Limit class B, for use in residential areas | Yes; Radio interference suppression according to EN55011, Limit Value Class B |
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| Siemens Eco Profile (SEP) | Siemens EcoTech |
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| CE mark | Yes |
| CSA approval | Yes; covered by UL cert |
| UL approval | Yes |
| FM approval | Yes |
| developed in accordance with IEC 61131 | Yes |
| according to VDE 0631 | Yes |
| Marine approval | Yes |
| Ecological footprint: environmental product declaration Global warming potential | Yes |
| Ecological footprint: global warming potential, (total) [CO2 eq] | 51.5 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 9.64 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 42.1 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.364 kg |
| Ambient temperature during operation: min. | -20 °C; No condensation |
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| Ambient temperature during operation: max. | 55 °C |
| Ambient temperature during storage/transportation: min. | -40 °C |
| Ambient temperature during storage/transportation: max. | 70 °C |
| Altitude during operation relating to sea level: Ambient air temperature-barometric pressure-altitude | Tmin ... Tmax at 1 080 hPa ... 795 hPa (-1 000 m ... +2 000 m) |
| Width | 71.5 mm; 4 modular widths (MW) |
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| Height | 90 mm |
| Depth | 58 mm |
| Net weight | 0.234 kg |
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| Country of origin | CN |
| Shipping weight | 0.734 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | Low stock |
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 6ED1052-2MD08-0BA2 is 10 A.
The tariff (HS) code on file for 6ED1052-2MD08-0BA2 is 85371091.
The EAN (GTIN) of 6ED1052-2MD08-0BA2 is 4034106034481.
6ED1052-2MD08-0BA2 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
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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