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        • Lifecycle status

          Active / Available from OEM
          Model selection and documentation for Bachmann ME203/CN are available through Apter Power.

        ME203/CN

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        Bachmann ME203/CN is an M1 processor module that executes controller tasks while integrating serial, CAN/CANopen and PC Card interfaces.
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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.
        Shipping Mode
        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 ME203/CN

        • Manufacturer:
          Bachmann
        • Part Number:
          ME203/CN
        • Product Family:
          Bachmann
        • Product Type:
          M1 Processor Module
        • Stock:
          1
        • Processor:
          Intel 80386 EX
        • Processor Clock:
          33 MHz
        • DRAM:
          8 MB
        • Battery-Backed SRAM:
          512 kB
        • Boot Flash:
          2 MB
        • Program and File Flash:
          8 MB
        • PC Card Storage:
          PCC201/xx, 16 MB, 32 MB or 64 MB
        • Serial Interface 1:
          RS232
        • Serial Interface 2:
          RS232/422/485 with 64-byte FIFO
        • CAN Interface:
          1 CAN/CANopen channel
        • CAN Transfer Rate:
          10 kbit/s to 1 Mbit/s
        • Supply Voltage:
          24 V DC, 18–34 V DC range
        • Integrated I/O Supply:
          17 W
        • I/O Supply Outputs:
          +5 V/2 A, +15 V/250 mA, -15 V/200 mA
        • Supply-to-System Isolation:
          500 V
        • Watchdog:
          Integrated
        • Real-Time Clock:
          Battery-backed
        • Status Indicators:
          RUN, INIT and ERROR LEDs
        • CPU Identification:
          Rotary hexadecimal switches
        • Operating Temperature:
          -30 to +60 °C, fanless
        • Storage Temperature:
          -40 to +85 °C
        • Relative Humidity:
          5–95%, non-condensing
        • Weight:
          0.441 lbs (0.2 kg)
        • Estimated shipping dimensions:
          5.5x11.9x6.1cm
        • Tariff Code:
          8537101190
        • Country of origin:
          Austria
        • 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 Communication Paths Memory Layout Power Domain Controller Identity

        Features:

        • Bachmann ME203/CN combines a 33 MHz Intel 80386 EX processor with dedicated controller memory.
        • Separate serial and CAN/CANopen interfaces divide the module's communication traffic.
        • A 17 W I/O supply and PC Card storage share the single-width M1 module.
        Bachmann ME203/CN places controller processing and local communication resources in one M1 module.

        Its memory areas separate running data, retained values, boot code and program or file storage.

        Serial devices and CAN/CANopen nodes connect through dedicated interfaces instead of sharing one physical port.

        The Bachmann ME203/CN M1 Processor Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bachmann ME203/CN M1 Processor 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.

        How the onboard ports divide traffic

        • Fixed serial path: One RS232 interface provides a dedicated point-to-point connection.
        • Configurable path: The second port selects RS232, RS422 or RS485 signaling and uses a 64-byte FIFO.
        • Fieldbus path: A separate CAN interface carries CAN or CANopen communication.
        • Port separation: Choosing a serial mode does not replace the independent CAN channel.

        Where controller data is held

        • Working area: DRAM supplies the main execution space for processor operations.
        • Retained area: Battery-backed SRAM preserves values across normal power removal.
        • Internal flash: Boot flash remains separate from program and file storage.
        • Removable storage: The PCC201/xx slot adds a PC Card without replacing the processor module.

        Controller and I/O power relationship

        • Incoming supply: The 24 V DC input feeds the module across its documented operating range.
        • Local conversion: The integrated supply generates regulated rails for the attached I/O load.
        • Load budget: The three output rails share the documented 17 W I/O supply capacity.
        • Isolation boundary: A 500 V barrier separates the incoming supply from system electronics.

        How the processor reports and identifies state

        • RUN indication: The RUN LED identifies the processor's normal execution state.
        • Initialization: INIT distinguishes startup activity from normal running.
        • Error indication: ERROR provides a dedicated visual state for processor faults.
        • CPU identity: Rotary hexadecimal switches assign the controller identifier without editing the program.
        Description
        Bachmann ME203/CN is a single-width M1 processor module that combines controller execution, memory, communication interfaces and an auxiliary I/O supply. Its 33 MHz Intel 80386 EX processor runs the control program while the M1 backplane links the module to the surrounding I/O structure.

        Program handling in Bachmann ME203/CN is divided among DRAM, battery-backed SRAM, boot flash and program or file flash. The PCC201/xx slot adds removable PC Card storage without replacing the processor module.

        Communication on Bachmann ME203/CN uses one fixed RS232 port, one selectable RS232/422/485 port and a separate CAN/CANopen interface. These physical paths keep serial devices and CAN nodes from sharing the same onboard connector.

        A 24 V DC input powers Bachmann ME203/CN and its integrated 17 W I/O supply, with isolation between the supply and system electronics. RUN, INIT and ERROR indicators, the watchdog, real-time clock and rotary CPU-ID switches provide the module's operating and identification controls.
        Alternative Names
        ME203CN ME 203/CN Bachmann ME203/CN ME203 CN ME2O3/CN ME203-CN Bachmann ME203 CN ME203/CN Processor Module
        Technical notes
        For Bachmann ME203/CN selection, match the 386EX processor, three onboard communication paths and integrated 17 W I/O supply to the installed M1 configuration.
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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 can a technician distinguish Bachmann ME203/CN from another ME203 execution before replacement?
        Confirm the full Bachmann ME203/CN suffix and verify CAN/CANopen, one fixed RS232 port, one configurable RS232/422/485 port, the PCC slot and the integrated 17 W supply.
        Which serial connection should be selected when Bachmann ME203/CN must use RS485 signaling?
        Use the configurable RS232/422/485 interface on Bachmann ME203/CN; the other serial interface remains the fixed RS232 path.
        Can the onboard supply of Bachmann ME203/CN be treated as an unlimited I/O source?
        No; the attached I/O load on Bachmann ME203/CN must remain within the documented 17 W total and the individual regulated-rail limits.
        What must be checked before assigning the CPU identity on Bachmann ME203/CN?
        The rotary hexadecimal switch setting on Bachmann ME203/CN must match the intended M1 controller identity before operation.
        Where should retained controller values be kept in Bachmann ME203/CN?
        Bachmann ME203/CN provides 512 kB of battery-backed SRAM for retained data, separate from DRAM and flash storage.
        What cabinet condition matters for fanless operation of Bachmann ME203/CN?
        Bachmann ME203/CN is specified for -30 to +60 °C operation with 5–95% non-condensing humidity, so the enclosure must maintain those limits.

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