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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power specializes in sourcing obsolete Siemens 6ES7235-0KD22-0XA0 analog expansion blocks, offering fully tested, factory-grade replacement hardware to guarantee continuous, precise signal processing.

        6ES7235-0KD22-0XA0

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        The Siemens 6ES7235-0KD22-0XA0 is a reliable SIMATIC S7-200 analog expansion module designed exclusively to enhance the processing capabilities of S7-22X CPU control systems.
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        Ships by Thursday, October 29
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 6ES7235-0KD22-0XA0

        • Manufacturer:
          Siemens
        • Part Number:
          6ES7235-0KD22-0XA0
        • Product Family:
          Siemens Simatic S7-200
        • Product Type:
          Analog Input/Output Expansion Module
        • Stock:
          2
        • Power Consumption:
          Max. 30 mA from 5V DC backplane; Max. 60 mA from external 24V DC sensor supply
        • Power Loss:
          2.0 W
        • Analog Inputs (AI):
          4 Channels; Differential architecture
        • AI Destruction LimitsVoltage Input:
          Max 30V; Current Input: Max 32 mA
        • AI Current Range:
          0 to 20 mA
        • AI Resolution & Speed:
          12-bit conversion resolution; Basic conversion time: < 0.25 ms per channel
        • Analog Outputs (AQ):
          1 Channel; Ranges: -10V to +10V or 0 to 20 mA
        • AQ Output Resolution:
          11-bit conversion resolution (including sign bit)
        • AQ Settling TimeVoltage Output:
          100μs; Current Output: 2 ms
        • Weight:
          0.15 kg
        • Estimated shipping dimensions:
          7.5x6.2x9.5cm
        • Tariff Code:
          8537101190
        • Country of origin:
          Germany
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Applications Operating Environment Monitoring & Control

        Features:

        • Flexible Multi-Range Software and Hardware Configuration
        • Ultra-Fast 12-Bit Analog Signal Conversion Matrix
        • Advanced Integrated Diagnostics for Maximum System Uptime
        The Siemens 6ES7235-0KD22-0XA0 features an adaptable input matrix supporting 15 distinct voltage and current ranges. Engineers can fine-tune individual channels for ultra-low millivolt sensors or standard ±10V industrial loops via DIP switch settings, making this single module highly compatible with varied multi-sensor arrays.

        Equipped with a high-speed, integrated 12-bit analog-to-digital converter matrix , the Siemens 6ES7235-0KD22-0XA0 delivers a blazing conversion speed of less than 0.25 milliseconds per channel. This ensures that real-time automation processes receive highly precise, low-latency data feedback to execute instant PID loop corrections.

        The Siemens 6ES7235-0KD22-0XA0 is designed with a prominent red External Fault (EXTF) diagnostic LED located on its front face. This built-in hardware monitoring tool immediately flags wiring errors, power loss, or over-range inputs, enabling field technicians to troubleshoot issues instantly and dramatically minimize unscheduled factory downtime.

        The 6ES7235-0KD22-0XA0 Siemens SIMATIC S7-200 EM 235 Analog Input/Output Expansion Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 6ES7235-0KD22-0XA0 SIMATIC S7-200 EM 235 Analog Input/Output Expansion Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        Siemens 6ES7235-0KD22-0XA0 SIMATIC S7-200 EM 235 Analog Input/Output Expansion Module

        General

        • Manufacturer Siemens
        • Model 6ES7235-0KD22-0XA0
        • Condition New Original ready stock
        • Product Family 6ES7221-1BH32-0XB0,6ES7222-1BH32-0XB0,6ES7222-1HF22-0XA0
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Advanced Water and Wastewater Treatment Automation:The module is widely deployed in pumping stations and treatment plants to read analog flow-meters (0-20mA) and level sensors. It handles continuous feedback loops to dynamically adjust variable frequency drives (VFDs) via its ±10V voltage output channel.
        • HVAC and Environmental Climate Control Infrastructure: Utilized in large-scale commercial building management systems to capture multi-zone pressure and humidity signals. The 4 differential inputs allow for long, noise-resilient sensor cable runs across expansive mechanical floors.
        • Factory Automation and Conveyor Speed Optimization: Integrated into packaging and assembly machinery to synchronize multiple motorized axes. It reads analog position encoders and feeds real-time velocity corrections back to mechanical actuators via fast conversion cycles.
        • Extrusion and Plastic Molding Process Supervision: Monitors hydraulic pressures and barrel heater parameters in injection molding equipment. It ensures that critical pressure profiles are held within tight operational boundaries (±0.5% accuracy) during high-speed molding cycles.
        • Robust Temperature Resiliency:Engineered to operate reliably in ambient industrial temperatures, providing consistent 12-bit precision. When working at a nominal ambient temperature of 25℃, the module achieves an absolute basic error limit of ±0.5%.
        • Aggressive Noise and Interference Immunity: Features a hardware-based common mode rejection system that suppresses electrical noise by up to 40 dB within frequencies ranging from DC to 60 Hz. This protects weak sensor signals from the electromagnetic noise created by neighboring high-power motor contactors.
        • Non-Isolated System Architecture Planning: Because there is no internal galvanic potential separation between the input/output channels and the internal CPU bus, the module operates best in an enclosed environment with a well-grounded backplane and shared reference potentials.
        • Rigid Mechanical Vibrational Defense: Housed in a rugged, fully enclosed polymer shell designed to withstand the vibration profiles typical of heavy industrial machinery cabinets, ensuring the internal components do not suffer from physical micro-fractures.
        • Real-Time LED Status Feedback: Equipped with a dedicated front-panel External Fault (EXTF) red LED indicator. This diagnostic light instantly triggers when external sensor loops fail, when 24V supply voltage drops below acceptable limits, or when an out-of-range signal occurs.
        • High-Fidelity PID Closed-Loop Tuning: Supporting an ultra-low conversion latency of less than 0.25 ms per channel , the module allows the master S7-22X CPU to run tightly synchronized PID software loops. This enables rapid corrections to stabilize fluctuating process variables.
        • Flexible Analog-to-Digital Register Mapping: Converts raw physical currents and voltages into precise mathematical integers ranging from 0 to 32,000 (unipolar) or -32,000 to +32,000 (bipolar). This predictable data register mapping simplifies PLC code writing and data scaling routines.
        • Stable Output Voltage and Current Maintenance: The single analog output provides smooth, regulated control signals with a fast 100 μs voltage settling time. It safely sustains a minimum load impedance of 5 kΩ on voltage runs and up to 0.5 kΩ on current loops, ensuring clean signal transmission to valves and actuators.
        Description
        The Siemens 6ES7235-0KD22-0XA0 EM 235 module serves as a critical bridge between your analog field instrumentation and your PLC, delivering rapid 12-bit analog-to-digital conversion. Equipped with 4 flexible differential inputs and 1 analog output , it provides micro-second response times to seamlessly track and control dynamic physical variables such as pressure, temperature, and fluid flow. 

        Engineered to handle a diverse spectrum of industrial signals, the Siemens 6ES7235-0KD22-0XA0 supports 6 distinct unipolar voltage ranges, 9 bipolar voltage configurations, and standard 0 to 20 mA current loops. This vast range flexibility eliminates the need for expensive external signal conditioners, allowing engineers to connect a wide variety of legacy and modern sensors directly to a single module.

        Built to withstand harsh manufacturing environments, the Siemens 6ES7235-0KD22-0XA0 boasts a compact 71.2mm-wide footprint that optimizes valuable DIN-rail space inside control cabinets. With its built-in hardware noise suppression (40 dB from DC to 60 Hz) and a dedicated external fault diagnostics LED, this legacy component ensures maximum uptime and stable, long-term operation.  

        As a crucial expansion block for the venerable SIMATIC S7-200 series, the Siemens 6ES7235-0KD22-0XA0 is a high-demand item for factory modernization, MRO (Maintenance, Repair, and Operations), and machine duplication. Integrating this authentic Siemens module ensures full system compatibility, preventing costly custom programming or premature system overhauls.
        Alternative Names
        6ES7235-OKD22-OXAO 6ES7235 0KD22 0XA0 6ES7221-1BH32-0XB0 6ES7222-1BH32-0XB0 6ES7222-1HF22-0XA0 6ES7231-4HF32-0XB0
        Technical notes
        The Siemens 6ES7235-0KD22-0XA0 requires careful calibration via its onboard DIP switches to properly match the chosen voltage or current input range before powering on the system. Furthermore, the Siemens 6ES7235-0KD22-0XA0 features non-isolated analog channels, meaning a common external 24V DC power supply must share a grounded reference to prevent ground loops and signal distortion.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the exact bit resolution of the Siemens 6ES7235-0KD22-0XA0 for its inputs and outputs?
        The Siemens 6ES7235-0KD22-0XA0 generates a 12-bit analog value for its 4 input channels, rendering digital unipolar values from 0 to 32,000 and bipolar values from -32,000 to +32,000. For its single analog output channel, the digital-to-analog conversion utilizes an 11-bit resolution (including the sign bit), which translates to highly responsive settling times of 100 μs for voltage signals.
        How does the Siemens 6ES7235-0KD22-0XA0 handle electrical isolation between the process loops and the PLC backplane?
        The Siemens 6ES7235-0KD22-0XA0 does not feature internal potential separation (galvanic isolation) between its analog input channels, its analog output channel, or the internal PLC logic bus. Because of this non-isolated design, it is critical that engineers ensure a unified reference ground and consider external isolation blocks if field devices operate across significant ground potential differences.
        Can the Siemens 6ES7235-0KD22-0XA0 accept direct inputs from thermocouples or RTD sensors?
        No, the Siemens 6ES7235-0KD22-0XA0 does not support onboard parameterizable temperature compensation or direct high-resolution linearization for thermocouples. While it can read raw millivolt signals (e.g., 0-50mV), connecting thermocouples or RTDs directly is not recommended; instead, you should route them through external temperature transmitters or use dedicated S7-200 thermal modules (like the EM 231).
        What software and firmware requirements must be met to integrate the Siemens 6ES7235-0KD22-0XA0 into a project?
        The Siemens 6ES7235-0KD22-0XA0 is fully compatible with Siemens STEP 7-Micro/WIN programming software. It requires no specialized software hardware updates or GSD files, as it is natively recognized by all compatible S7-22X series CPUs once it is physically connected to the expansion bus interface.
        What are the current lifecycle status and replacement strategies for the legacy Siemens 6ES7235-0KD22-0XA0 module?
        The Siemens 6ES7235-0KD22-0XA0 belongs to the classic SIMATIC S7-200 product family, which has been formally phased out by Siemens in favor of the newer SIMATIC S7-1200 series. However, because thousands of legacy machines still rely on this exact form factor, our company supplies brand-new, factory-sealed warehouse stocks and high-quality, fully tested replacement units to support your ongoing MRO requirements without requiring a costly system-wide migration.

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