Siemens 6ED1055-1FB00-0BA2 Energy-Saving Expansion for LOGO!

Siemens 6ED1055-1FB00-0BA2 Energy-Saving Expansion for LOGO! Automation

The Siemens 6ED1055-1FB00-0BA2 is a LOGO! DM8 digital expansion module engineered to extend the I/O capacity of Siemens LOGO! logic controllers while maintaining a lean energy footprint. With 4 digital inputs and 4 relay outputs rated at 10 A, this module enables precise, low-overhead control of discrete field devices — from motor contactors and solenoid valves to indicator panels and conveyor interlocks — without adding unnecessary power draw to the control cabinet. In modern production environments where every watt counts, the 6ED1055-1FB00-0BA2 delivers measurable efficiency gains by eliminating redundant relay stages and consolidating I/O expansion into a single compact DIN-rail unit.

Designed for seamless integration with the LOGO! 8 series base units — including the LOGO! 8.3 230RCE and LOGO! 8.3 12/24RCE — this module communicates directly over the LOGO! expansion bus, requiring no additional wiring harness or communication card. The result is a tighter control loop, reduced signal latency, and a more deterministic response time for time-critical production sequences. When paired with the LOGO! TDE text display, operators gain real-time visibility into I/O states and energy-relevant parameters directly at the machine level, reducing the need for remote diagnostics and the associated downtime.

Efficiency Performance Table

Energy-Aware Automation Architecture

In a typical energy-conscious automation cell, the 6ED1055-1FB00-0BA2 sits at the intersection of sensing and actuation. Upstream, a LOGO! 8.3 230RCE base unit collects process signals — temperature thresholds, pressure switches, flow sensors — and executes the programmed logic. The DM8 expansion module then drives the output relays that switch motor starters, fan contactors, and pump controls based on that logic, ensuring loads are energized only when process conditions demand it. This demand-driven switching is one of the most direct methods of reducing idle energy consumption on a production line.

For applications requiring variable-speed motor control, the LOGO! system can issue enable and setpoint signals to a Siemens SINAMICS G120C variable frequency drive via discrete I/O or Modbus RTU. The G120C adjusts motor speed in real time, dramatically reducing energy consumption during partial-load conditions — a common scenario in conveyor, pump, and fan applications. The 6ED1055-1FB00-0BA2 provides the additional relay outputs needed to manage drive enable, fault reset, and speed-select signals without consuming the base unit’s native I/O.

Power quality monitoring is equally important in an energy-optimized plant. A Siemens SENTRON PAC3200 power monitoring device installed upstream of the control panel can log active power, reactive power, and harmonic distortion in real time. When integrated with the LOGO! controller via Modbus, the PAC3200 data can trigger load-shedding routines through the DM8 relay outputs — automatically disconnecting non-critical loads during peak demand periods and protecting the facility from demand charge penalties.

On the communication side, the LOGO! 8 series supports Ethernet-based connectivity through the onboard RJ45 port, enabling integration with SCADA systems, cloud-based energy dashboards, and OPC UA clients. A LOGO! CMR2020 communication module can extend this capability to cellular networks, allowing remote monitoring of energy KPIs from off-site locations. The 6ED1055-1FB00-0BA2 expansion module ensures that the additional field devices connected to these remote sites are reliably controlled without adding communication overhead.

For distributed I/O architectures, the Siemens ET 200SP I/O system offers a scalable alternative for larger installations, while the LOGO! DM8 remains the preferred choice for compact, standalone machine control where cabinet space and power budget are constrained. In hybrid architectures, the DM8 module handles local discrete control while a SIMATIC S7-1200 CPU manages higher-level process coordination over PROFINET — a common topology in food processing, packaging, and HVAC applications.

Power Optimization in Real Production Lines

Consider a bottling line where conveyors, filling stations, and capping machines must be sequenced with precision to avoid product waste and energy spikes. A LOGO! 8.3 base unit with a 6ED1055-1FB00-0BA2 expansion module can implement a staggered start sequence — energizing each motor contactor with a 500 ms delay — preventing the inrush current surge that occurs when all drives start simultaneously. This single optimization can reduce peak demand by 15–25%, directly lowering electricity costs without any hardware investment beyond the LOGO! system itself.

In HVAC applications, the DM8 relay outputs control damper actuators, chiller enable signals, and AHU fan starters based on occupancy schedules and temperature setpoints programmed into the LOGO! controller. By replacing fixed-time schedules with condition-based switching, facilities routinely achieve 10–20% reductions in HVAC energy consumption. The 6ED1055-1FB00-0BA2’s relay contacts, rated for 10 A at 250 V AC, are well-suited for direct switching of these loads without intermediate contactors.

Predictive maintenance is another dimension of energy optimization. When motor current draw increases beyond a baseline — indicating bearing wear or mechanical friction — the LOGO! system can trigger an alert through one of the DM8 relay outputs, activating a warning beacon or sending a notification via the CMR2020 cellular module. Catching mechanical degradation early prevents the energy waste associated with motors running under abnormal load conditions, and avoids the far greater cost of unplanned downtime.

Every unit of the 6ED1055-1FB00-0BA2 supplied by ZYPLC undergoes functional testing prior to shipment, verifying input response, relay switching, and bus communication integrity. Stock is maintained for immediate dispatch, supporting both planned maintenance schedules and urgent replacement requirements. The 12-month warranty covers all functional defects, providing procurement teams with the confidence to standardize on this module across multiple production sites.

Energy Optimization FAQ

Q1: How does the 6ED1055-1FB00-0BA2 contribute to energy savings compared to a standalone relay panel?
A: By integrating directly with the LOGO! logic controller, the DM8 module eliminates the need for auxiliary relay panels and their associated standby power draw. Condition-based output switching — rather than fixed-time energization — ensures loads are active only when process conditions require it, reducing idle energy consumption across the control system.

Q2: Is the 6ED1055-1FB00-0BA2 compatible with all LOGO! 8 base units?
A: Yes. The module is compatible with all LOGO! 8 series base units using the 0BA7, 0BA8, and 0BA9 firmware generations, including the 230RCE, 24RCE, and 24RCEo variants. It connects directly via the LOGO! expansion bus without additional configuration.

Q3: Can this module replace an older 6ED1055-1FB00-0BA1 unit without reprogramming?
A: In most cases, yes. The 0BA2 revision maintains functional and dimensional compatibility with the 0BA1 predecessor. Minor firmware differences may apply; it is recommended to verify the LOGO! Soft Comfort project against the installed base unit firmware version before deployment.

Q4: What does the 12-month warranty cover, and what is the testing process?
A: Every 6ED1055-1FB00-0BA2 unit is functionally tested before shipment, covering digital input response, relay output switching under load, and expansion bus communication. The 12-month warranty covers all manufacturing and functional defects from the date of invoice. Units are dispatched from verified stock with full traceability documentation available on request.

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