Siemens Oxygen Trim Controller Pll52.110a200, Supply voltage: 230 V AC

Product Details

Energy Combustion, Ahmedabad importer and suppliers of Siemens make burner accessories.The Siemens PLL52.110A200 is an electronic oxygen trim module used specifically as an extension for the LMV52 burner management system. Its primary role is to provide closed-loop oxygen control by interfacing with the QGO20 oxygen sensor to optimize combustion efficiency. 1. Key Technical Specifications The "A200" suffix denotes the voltage and parameter set, typically used in European/International markets. Parameter Specification Supply Voltage $230\text{V AC}$ ($+10\% / -15\%$), $50/60\text{ Hz}$ Compatible System Siemens LMV52 Series (requires CAN bus connection) Compatible Sensor QGO20... Oxygen Sensor Inputs Flue gas temperature and combustion air temperature Communication Integrated CAN bus interface Power Consumption Approx. $10\text{ VA}$ Protection Class IP40 (when mounted correctly) Operating Temp $-20\text{°C}$ to $+60\text{°C}$ Weight Approx. $2.35\text{ kg}$ 2. Core Functions Combustion Optimization: It constantly monitors the residual oxygen ($O_2$) in the flue gas. If the level deviates from the pre-set curve in the LMV52, the PLL52 sends a correction signal to the air damper or fuel actuator to "trim" the ratio. Efficiency Monitoring: By collecting flue gas and combustion air temperatures, the module calculates the real-time combustion efficiency ($\eta$). Emission Reduction: Helps maintain the burner at the "excess air" sweet spot, significantly reducing $CO_2$ and $NOx$ emissions while preventing $CO$ formation. Cold Start Logic: Can be used to manage flue gas recirculation (FGR) hold functions during the ignition phase. 3. Installation & Connectivity Mounting: Usually mounted in the control cabinet alongside the LMV52 base unit. It utilizes a plug-in terminal system for easy replacement. CAN Bus: It acts as a node on the LMV system's CAN bus. It must be addressed correctly so the LMV52 recognizes it as the $O_2$ module. Flue Gas Collector: Usually used in tandem with the AGO20 flue gas collector, which houses the QGO20 sensor. 4. Troubleshooting Indicators The PLL52 typically communicates its status via the AZL52 display unit. Common $O_2$ related faults include: Sensor Heating Fault: The QGO20 sensor requires an internal heater to reach operating temperature; the PLL52 monitors this circuit. Calibration Errors: If the sensor cannot be calibrated to ambient air ($20.9\%\ O_2$), the module will lock out the trim function for safety. CAN Bus Timeout: If communication between the PLL52 and the LMV52 is interrupted, the burner will usually revert to its "Base Curve" (ignoring the trim) or shut down depending on safety settings.