Siemens 6ED1052-2CC01-0BA6​ 24V Transistor Output Module for Pump & HVAC Control

Description

Application Scenarios

A municipal wastewater lift-station in Bavaria runs three submersible pumps on a duty/standby/alternating scheme, with float-switch inputs for “dry,” “normal,” and “high” levels. The original panel builder spec’d a full-size S7-1200 for the job, but the I/O count — 6 floats + 3 pump contactors — barely scratched the surface of that PLC’s capacity, and the budget blew past the municipality’s cap. The系统集成商 swapped in a 6ED1052-2CC01-0BA6​ instead: 8 DI swallowed the three float switches (with spares left over), 4 transistor DO drove the pump contactor coils through interposing relays, and the onboard real-time clock enabled time-based alternating duty without any external timer relays. The 6ED1052-2CC01-0BA6​ also gave them a surprise bonus — two of the spare DI were wired as 0–10 V from a sludge-level ultrasonic, replacing a separate analog isolator module. The station has now run four years without a single logic fault. The pain point here was classic overspec: many small machines don’t need a full PLC, and the 6ED1052-2CC01-0BA6​ hits the sweet spot where relay logic is too clumsy but an S7 is overkill.

Parameter

Technical Principles and Innovative Values

• Innovation Point 1: Hybrid DI/AI Flex Architecture.​ The 6ED1052-2CC01-0BA6​ doesn’t lock its 8 inputs to “digital only.” Four of them can be software-configured as 0–10 V analog inputs inside LOGO!Soft Comfort, meaning one module can handle float switches and a 0–10 V pressure transducer without buying a separate analog card. For 0BA6 this was a jump from the prior gen’s 2 analog-capable inputs to 4.
• Innovation Point 2: 50 % Bigger Logic Canvas.​ Compared to the 0BA5 predecessor, the 6ED1052-2CC01-0BA6​ doubled down on the 200-function-block memory (up from ~130), letting engineers embed PWM outputs, ramp-function blocks, and retentive counters in the same footprint. The 4 fast-counter inputs run to 5 kHz (vs. 2 kHz on 0BA5), which is why small conveyor OEMs still hunt for this module.
• Innovation Point 3: Display-Less but Not Headless.​ Even though the 6ED1052-2CC01-0BA6​ drops the onboard LCD to cut cost, it speaks natively to the LOGO! TD text display over a short ribbon — meaning the same program can be serviced on-site with a £40 add-on rather than a laptop. In panels where the module hides behind a closed door, this split-architecture saves hours of commissioning time.

Application Cases and Industry Value

Case 1 – Small Dairy Pasteurizer (Netherlands, Food & Beverage):​ A family-run dairy added a second 500 L pasteurizer tank and needed basic interlocks — door-open inhibit heater, three-thermostat voting, agitator-run confirmation — plus a 0–10 V signal from the plate-heat-exchanger outlet. The OEM originally quoted an S7-1200 + SM 1231 analog card at €900 landed. The plant engineer substituted a 6ED1052-2CC01-0BA6​ (€180 at the time) with one 0–10 V DI assigned to the heat-exchanger PT100 transmitter (via 0–10 V head), and the other seven DIs handling door, thermostat, and agitator contacts. The 4 transistor DOs fired SSRs for the heater banks. Three years later, the only maintenance action was a firmware-backup SD card swap during a panel move. The 6ED1052-2CC01-0BA6​ paid for itself in panel space alone — the old relay-logic schematic needed two 8-relay sockets and a separate temp controller; the LOGO! ate one 72 mm slot.Case 2 – Carwash Bay Sequencer (UK, Commercial):​ A three-bay rollover carwash retrofit replaced a tangle of timer relays and pressure switches with a 6ED1052-2CC01-0BA6. The 8 DI picked up bay-occupied photoelectric, door-closed, brush-position limit, and foam-pump pressure; 4 DO sequenced the main pump VFD enable, foam solenoid, brush motor, and bay “wash-in-progress” beacon. The RTC let the owner schedule “eco mode” (pump standby) between 02:00–05:00. The carwash owner’s feedback: “The 6ED1052-2CC01-0BA6​ took one morning to wire and I haven’t touched it since — the old timers failed twice a winter.”