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        Siemens 6GK7243-2AX01-0XA0
        Siemens 6GK7243-2AX01-0XA0
        Siemens 6GK7243-2AX01-0XA0
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        6GK7243-2AX01-0XA0

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        The 6GK7243-2AX01-0XA0 is a Siemens CP 243-2 communications processor that connects an S7-200 PLC to an AS-Interface master network, supporting up to 62 slaves with V2.11 specification.
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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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        Technical specifications for 6GK7243-2AX01-0XA0

        • Manufacturer:
          Siemens
        • Part Number:
          6GK7243-2AX01-0XA0
        • Product Family:
          Siemens Simatic Net
        • Product Type:
          AS-Interface Master Communications Processor
        • Compatible PLC:
          SIMATIC S7-22X
        • AS-i Specification:
          V2.11, Master Profile M3
        • Max AS-i Slaves:
          62
        • Max Digital Inputs:
          248
        • Max Digital Outputs:
          186
        • Bus Cycle Time (31 slaves):
          5 ms
        • Bus Cycle Time (62 slaves):
          10 ms
        • Backplane Current:
          220 mA
        • AS-i Current (30V):
          100 mA
        • Power Loss:
          3.7 W
        • Isolation Voltage:
          500 V
        • Key Benefit:
          Solves AS-Interface integration with S7-200 PLCs, eliminating separate master hardware, reducing cabinet space, and providing galvanic isolation for field device protection.
        • Weight:
          0.15 kg
        • Estimated shipping dimensions:
          7.5x6.2x9.5cm
        • Tariff Code:
          8486209000
        • Country of origin:
          Germeny
        • 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 Application Protection Functions Installation Method

        Features:

        • AS-Interface master supporting up to 62 slaves with V2.11 specification and M3 master profile.
        • Galvanic isolation (500 V) between AS-interface and S7-200 backplane for noise protection.
        • Supports up to 248 digital inputs and 186 digital outputs with 5 ms cycle time for 31 slaves.
        The 6GK7243-2AX01-0XA0 bridges the gap between simple AS-i field devices and an S7-200 PLC. AS-Interface is a low-cost, two-wire network for connecting binary sensors and actuators—limit switches, proximity sensors, pushbuttons, and small contactors. Without this module, the S7-200 cannot communicate with AS-i devices. The 6GK7243-2AX01-0XA0 acts as the AS-i master, polling up to 62 slaves and making their I/O data available to the PLC program. This allows the S7-200 to control an entire machine cell or small production line using low-cost AS-i cabling instead of point-to-point wiring.

        The 6GK7243-2AX01-0XA0 delivers deterministic performance with a 5 ms bus cycle when using up to 31 slaves. This is fast enough for most machine control applications, including packaging, material handling, and small assembly cells. Even at the maximum configuration of 62 slaves, the cycle time is only 10 ms—still suitable for many industrial processes. The module supports up to 248 digital inputs and 186 digital outputs, providing ample I/O capacity for small to medium applications. The galvanic isolation at 500 V protects the S7-200 CPU from electrical noise generated by field devices.

        It draws 220 mA from the backplane bus and 100 mA from the AS-interface at 30 V, with total power loss of only 3.7 W. LED indicators (PWR, APF, CER, AUP, CM, SF) provide immediate status feedback. Configuration is done via onboard pushbuttons or the command interface—no separate software is required for basic setup. For facilities using AS-Interface sensors and actuators with S7-200 PLCs, this module is the essential link.

        The 6GK7243-2AX01-0XA0 Siemens Communications Processor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

        Siemens 6GK7243-2AX01-0XA0 Communications Processor Manuals, Datasheets, Drivers, 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 6GK7243-2AX01-0XA0 Communications Processor Specs

        General

        • Manufacturer Siemens
        • Model 6GK7243-2AX01-0XA0
        • Condition New Original ready stock
        • Product Family 6GK7142-7BX00-0XA0,6GK7142-5DX00-0XA0,6ES7138-4CA01-0AA0
        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.
        • Machinery and Conveying Systems: Connects limit switches, photoelectric sensors, cylinder solenoid valves, etc., distributed in various locations.
        • Packaging and Sorting Equipment: Simplifies wiring in production lines that require processing large amounts of digital signals (switching signals).
        • Logistics Conveying Control: Suitable for scenarios requiring long-distance distribution and low-cost networking.
        • Simple Control Tasks: As an extension of the S7-200, it handles up to 62 AS-i slave devices (V2.1 standard).
        • LED Status Indicators: The panel is equipped with multiple LEDs to display module power, AS-i network faults, slave configuration errors, and other statuses.
        • Short Circuit and Overload Protection: Built-in protection circuitry prevents damage to the module from abnormal AS-i bus power supply, providing short circuit protection.
        • System Diagnostic Communication: Real-time transmission of slave faults (such as disconnection or read errors) to the CPU facilitates fault location via HMI or programming software.
        • Fault Tolerance Mechanism: A data verification mechanism is incorporated into AS-i network communication to enhance resistance to electromagnetic interference.
        • Rail Mounting: Directly mounted on a 35mm standard DIN rail, located on the right side of the CPU.
        • Bus Connection: Connects to the S7-200 CPU or the expansion interface of the previous expansion module via the included ribbon cable.
        • External Power Supply: In addition to the PLC's internal power supply, the module must be connected to a dedicated AS-i power supply (30V DC) to power the slave stations on the bus.
        Description
        The 6GK7243-2AX01-0XA0 is a communications processor for the SIMATIC S7-200 PLC family, enabling connection to an AS-Interface master network. It supports the AS-Interface specification V2.11 with master profile M3, allowing up to 62 AS-i slaves per network. The module features screw-type connections for the AS-interface and mounts on a 35 mm DIN rail. It draws 220 mA from the backplane bus and 100 mA from the AS-interface at 30 V.

        The 6GK7243-2AX01-0XA0 provides galvanic isolation between the AS-interface and the S7-200 backplane, protecting the PLC from field-side electrical noise. It supports up to 248 digital inputs and 186 digital outputs via the AS-i network. The bus cycle time is 5 ms for 31 slaves and 10 ms for 62 slaves. Configuration is performed via pushbuttons on the device or through the command interface.

        This communications processor solves the pain point of integrating AS-Interface field devices with an S7-200 PLC. The 6GK7243-2AX01-0XA0 eliminates the need for separate AS-i master hardware, reducing cabinet space and wiring complexity. Its galvanic isolation protects the PLC from field transients, while the fast 5 ms cycle time ensures responsive control for up to 31 slaves.
        Alternative Names
        6GK7142-7BX00-0XA0 6GK7142-5DX00-0XA0 6ES7138-4CA01-0AA0 6ES7331-7KF02-0AB0
        Technical notes
        The 6GK7243-2AX01-0XA0 is a communications processor (CP 243-2) by Siemens for the SIMATIC S7-22X series PLCs. The module is part of the SIMATIC NET product family and it functions as an AS-Interface Master. It supports the AS-Interface specification V2.11 with master profile M3, and it provides connectivity for up to 62 AS-i slaves per network.
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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
        How many slaves can the 6GK7243-2AX01-0XA0 handle?
        Up to 62 AS-i slaves. Bus cycle time is 5 ms for 31 slaves and 10 ms for 62 slaves.
        What AS-i specification does this module support?
        Version V2.11 with master profile M3, compliant with extended AS-i specification.
        Can I use two CP 243-2 modules in one S7-200 CPU?
        Yes, a maximum of two 6GK7243-2AX01-0XA0 modules can be used per CPU.
        How do I configure the 6GK7243-2AX01-0XA0?
        Via pushbuttons on the device or through the command interface. No separate software is required for basic configuration.

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