Siemens 6ED1052-1FB08-0BA2 Controller Base Module

Siemens 6ED1052-1FB08-0BA2 (LOGO!230RCE V8.4) Application Scenarios

Key characteristics: Direct 230 V AC supply, relay outputs, on-board display, Ethernet (MQTT / Modbus-TCP / embedded web pages), multiplexable 0-10 V analog inputs. Suitable for small-I/O-count logic control with 220 V supply and remote monitoring requirements. Programmed via graphical function-block editor without complex PLC programming. Native I/O: 8 DI / 4 DO; expandable with LOGO!8-series expansion modules.

Full Designation: LOGO! 230RCE Logic Controller Base Module, with Display, Ethernet, Relay Output, 115-230 V AC/DC Supply

1. Model Code Decoding

2. Core Electrical Specifications

3. Hardware & Wiring Notes
4. Input terminals I1-I8 are universal AC/DC inputs matched to the 115-230 V supply rating. When I1/I2/I7/I8 are software-enabled as 0-10 V AI, these terminals shall receive voltage signals and must NOT be connected to high-voltage mains.
5. Relay outputs are potential-free contacts; common terminals can be wired to circuits of different voltage levels. For inductive loads (contactors, solenoid valves), RC snubber circuits must be connected in parallel.
6. LAN port: For programming, remote web-based monitoring, MQTT cloud uplink; built-in web pages are accessible directly via web browser.
7. SD-Card: Import / export programs & logs, perform firmware upgrade.

⚠️ Critical Prohibitions

Do not exceed ratings: 10 A resistive / 3 A inductive for relay outputs. Do not drive high-power motors directly. External fuses are required.

When channels are multiplexed for analog input (0-10 V), applying AC230 V will destroy input circuitry.

IP20 rating: For cabinet-mount use only. Not for outdoor installation, condensing or corrosive environments.

4. Compatible Replacement Options

– Direct drop-in replacement: `6ED1052-1FB08-0BA2` (LOGO! V8.4, current order reference)

– Legacy compatible variant: `6ED1052-1FB08-0BA1` (V8.3, identical pin-out, backward-compatible program; older firmware lacks MQTT features)

Note: LOGO!8.x (0BA8) base units are NOT compatible with legacy 0BA7 / 0BA6 expansion modules. Use LOGO!8-series expansions only (e.g. 6ED1055-1FB00-0BA2).

5. Typical Application Scenarios

Building automation: lighting control, fan & pump management, HVAC, auxiliary access-control logic; stand-alone simple machine control; agricultural irrigation; interlock logic for packaging machinery; IoT edge data acquisition, MQTT uplink to SCADA / cloud platforms.

6. Package Contents

Main unit ×1

Printed quick-start manual ×1

❗ Excluded: Ethernet cable, SD-card, external fuses, expansion modules (order separately).

5.1 Building HVAC (Primary Use-Case)

1. Fan control: Exhaust fans, fresh-air supply-fan interlocks; scheduled start-stop, differential-pressure trigger, fault alarm; web-based remote status visualization.
2. Pump control: Domestic-water / circulation pumps with duty-standby automatic change-over, overload alarm, water-level interlocking.
3. Lighting-control system

– Scheduled lighting for workshops, underground car-parks and public corridors; PIR trigger, holiday calendar scheduling.

– Fire-alarm interlock for lighting cut-off; upload lighting status via Ethernet to central control room.

4. Air-handling unit & damper control: Damper actuators, heater simple logic; 0-10 V channels acquire temperature / humidity transmitters for basic closed-loop regulation.
5. Cooling-tower & roof ventilation: Local logic plus remote web monitoring; MQTT data upload to building BA-system.

Advantages: No separate 24 V power supply required for 230 V operation; built-in web-server removes need for dedicated SCADA for browser-based supervision.

5.2 Stand-alone Simple Machine Control

For low-I/O machinery where full-scale PLC is not justified

1. Packaging auxiliary equipment: Conveyor start-stop interlocks, silo level detection, alarm indicators, timed discharging cycles.
2. Injection-molding auxiliary & cooling units: Cooling-fan / circulation-pump logic; 0-10 V temperature acquisition, fault-alarm output.
3. Air-compressor auxiliary control: Exhaust-fan, timed solenoid drain valve, aggregated fault-signal output.
4. Gate / roller-shutter / lifting-door logic: Limit-switch monitoring, interlocks, time-delay, manual-auto mode switching.

⚠️ Limitation: Max. 3 A inductive rating for relay contacts; use intermediate relays for large contactor coils. Not applicable for high-speed pulse-based motion control.

5.3 Agriculture & Water Treatment

1. Greenhouse simplified automation: Fan & shade-blind actuation; 0-10 V temperature-humidity acquisition; timed irrigation solenoids; MQTT upload to IoT platform.
2. Small-scale wastewater / reclaimed-water equipment: Pump rotation scheduling, high-low level interlocks, timed chemical-dosing, alarm outputs.
3. Fountains & water-feature installations: Cyclic multi-pump sequencing, fault-alarm logic.

5.4 Electrical Cabinet & LV Panel Auxiliary Logic

1. Low-voltage switchgear auxiliary logic: Bus-coupler interlocking, cabinet cooling-fan control, cabinet-door status acquisition, collective fault-alarm output.
2. PV / energy-storage auxiliary cabinets: Cabinet-heater / dehumidifier & cooling-fan temperature-driven / timed control; alarm telemetry over Ethernet.
3. UPS emergency-power auxiliary logic: Mains-failure detection, switching logic, audible-visual alarm outputs.

5.5 IoT Edge Acquisition (V8.4-Exclusive MQTT Feature)

Core enhancement versus older V8.3 (-0BA1 firmware):

1. Acquire digital status and 0-10 V analog measurements; transmit via MQTT to private / public cloud servers (e.g. Alibaba Cloud).
2. Operate as Modbus-TCP slave for connection to HMI / host supervisory systems. Built-in web-server for PC / mobile-browser status access without dedicated software.
3. Micro-SD-card data logging: record temperature, runtime timestamps; export CSV files for maintenance review.

❌ Non-Applicable Scenarios (Selection Pitfalls)

1. High-speed counting, pulse-output, servo motion control: Not supported by LOGO!.
2. Large I/O quantity: Native 8DI /4DO; maximum expandable to 24DI /16DO. For larger systems select S7-1200 PLC.
3. Frequent switching of heavy inductive loads: Limited mechanical relay contact life; use transistor-output variants for high-cycle applications.
4. Hazardous / explosive-risk zones: IP20 unit must be installed inside certified explosion-proof enclosures; cannot be mounted directly in Zone1/Zone2.
5. High-precision PID closed-loop control: Only basic PID function-block available; use standard PLC for demanding closed-loop performance.

Typical System Configuration Examples

Temperature acquisition: Multiplex I1 as 0-10 V AI for connection to temperature transmitter.

Contactor driving: LOGO! relay output → intermediate relay → contactor coil.

Remote monitoring: RJ45 LAN to local network; access embedded web-server via browser.

I/O expansion: 6ED1055-1FB00-0BA2 (230 V relay expansion module).

Siemens 6ED1052-1FB08-0BA2 (LOGO!230RCE V8.4) Full Technical Datasheet

Full Designation: LOGO! 230RCE Logic Controller Base Module, with Display, Ethernet, Relay Output, 115-230 V AC/DC, Firmware V8.4 with MQTT support

Power Supply Ratings

I/O Terminal Specifications

Program & Memory

Communication Interface (RJ45 Ethernet 10/100 Mbit/s)

LOGO! native protocol (programming, multi-LOGO! LAN networking)

Modbus-TCP (Master / Slave)

MQTT Client (V8.4 new feature, for private / public cloud connection)

Embedded Web-Server: browser-based supervision, custom web pages, data logging, email alarm notification

❗ Does NOT support Profinet, CANopen, KNX.

Mechanical & Mounting

Environmental Conditions

Approvals & EMC

Certifications: CE, UL, FM, RoHS

EMC: EN55011 Class B (residential environment), EN61000-6-2 industrial immunity

Critical Limitations (Selection Constraints)

1. Relay outputs are not suitable for high-cycle switching; intermediate relays must be used for heavy loads.
2. When channels are configured for 0-10 V analog input, AC230 V mains must never be connected, as input hardware will be destroyed.
3. No native high-speed counter, pulse-output or motion-control functions.
4. Only LOGO!8-series expansion modules (order suffix-0BA2) are compatible; legacy 0BA7 / 0BA6 expansions will not work.
5. No internal short-circuit protection; external fuses are required for all relay-output circuits.

Firmware Variant Comparison

6ED1052-1FB08-0BA1: V8.3, identical hardware pin-out; no MQTT, limited web-server capability.

6ED1052-1FB08-0BA2: V8.4, adds MQTT, enhanced web-server and improved email-alarm functions; current active ordering reference.