6ED1052-1MD08-0BA3, Siemens, LOGO! 12/24RCE, 8 DI, 4 relay DO

Siemens LOGO! 12/24RCE – logic module of the LOGO! generation 9

6ED1052-1MD08-0BA3 is a basic control unit of the series Siemens LOGO! 9 with display, supply 12/24 V DC, eight digital inputs and four relay outputs. It is used to control smaller machines, pumps, valves, lighting and process units where a full PLC architecture would be unnecessarily complex.

Key features

• Integrated display – commissioning, operation and diagnostics without a computer or an additional panel.
• 8 digital inputs, of which 4 usable as analogue 0–10 V – handles basic measurement without a separate analogue module.
• 4 relay outputs – load capacity 10 A resistive, 3 A inductive load.
• Ethernet and web server – remote monitoring, data logging, user web pages, cloud and MQTT.
• Memory for up to 800 function blocks – room for more extensive programs too.
• Modular expansion – digital, analogue and communication modules according to the application's needs.
• Mounting on 35 mm DIN rail, width 4 modules, operation −20 to +55 °C.

Technical specifications 6ED1052-1MD08-0BA3

Which assembly 6ED1052-1MD08-0BA3 belongs to

Power supply

• 6EP3331-6SB00-0AY0 – LOGO!Power 24 V DC / 1.3 A – the standard choice for the unit and one or two modules.
• 6EP3321-6SB00-0AY0 – LOGO!Power 12 V DC / 1.9 A – with 12 V supply.

Expanding inputs and outputs

• 6ED1055-1MB00-0BA3 – DM8 12/24R – adds 4 digital inputs and 4 relay outputs.
• 6ED1055-1MF00-0BA3 – AM4 AI/AQ – adds 2 analogue inputs and 2 outputs for control.

Operation and programming

• 6ED1058-0BA08-0YA3 – LOGO! Soft Comfort V9 – programming and simulation software, required for creating the program.
• 6ED1055-4MH08-0BA3 – TDE display – external touch panel for the switchboard door.

Not sure what you need for your assembly? Tell us what the machine needs to do and we will put together a complete assembly including the power supply and software.

Siemens documentation for 6ED1052-1MD08-0BA3

The links lead directly to official Siemens sources, so you always have the current version of the document.

• Datasheet PDF – complete parameters directly from the manufacturer.
• Operating instructions – installation, wiring, commissioning.
• Certificates and RoHS declarations
• Sales brochure
• Product page in SiePortal

How to choose the right LOGO! variant 9

What the designation 6ED1052-1MD08-0BA3 means

Relay or transistor outputs?

Relay outputs carry a higher current and can handle AC loads, but switch more slowly and have a limited mechanical life. Transistor outputs are fast and wear-free, but only for DC loads and lower current. For fast counting on a line choose transistor outputs; for switching contactors and valves choose relay outputs.

With or without display?

The version with display allows commissioning and diagnostics without a computer. The version without display (designation “o”, for example 6ED1052-2MD08-0BA3) is cheaper and suits places where the parameters do not change and nobody can reach the unit.

Frequently asked questions

What is the difference between LOGO! 9 and LOGO! 8?

LOGO! 9 is the newer generation with the designation 0BA3. Compared with generation 0BA2 it offers a larger program memory, MQTT support and extended cloud functions. It is programmed in LOGO! Soft Comfort V9.0 or higher, which can also run older projects.

Do I need a power supply for LOGO! 12/24RCE?

Yes. The unit is supplied with 12 or 24 V DC and the power supply is not included. We recommend LOGO!Power 24 V DC / 1.3 A for a unit with one or two modules.

What software is needed for programming?

LOGO! Soft Comfort version V9.0 or higher. Older projects from version V8 can still be run in it.

How many modules can be connected to the unit?

The unit can be expanded with digital, analogue and communication modules. The specific maximum number for this variant can be found in the Siemens datasheet linked above.

Can LOGO! be connected to a network and monitored remotely?

Yes. The unit has Ethernet and an integrated web server, and supports data logging, user web pages, cloud connection and MQTT.

Alternative Rievtech solution

For a new installation or complete rebuild, a smaller application can be handled with the unit Rievtech SR-12DC-DA-R. Rievtech uses its own hardware, software and expansion modules, so it is not a direct one-for-one replacement for Siemens LOGO!.

A practical comparison of generations and the replacement procedure can be found in our component selection guide.