[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"top-categories":3,"$fW1bBFApnFCupTEMQkeZKcmEbjbVIe8d0SsYWf1ND024":104,"$f65K3v4K7EZ8TeS2XvRuxGemQKnSPqCzvsbWOlX5e1jY":200},{"statusCode":4,"message":5,"data":6},200,"Found top categories!",[7,11,15,20,24,28,32,37,40,44,49,53,57,61,65,69,73,77,81,85,89,93,97,101],{"_id":8,"name":9,"slug":9,"posts_count":10},"65b98e6b00650ab0139663cb","philips",309,{"_id":12,"name":13,"slug":13,"posts_count":14},"65f193f50b38412280a12a8b","remington",224,{"_id":16,"name":17,"slug":18,"posts_count":19},"65b98303fb1e5a098bef4288","hamilton beach","hamilton-beach",215,{"_id":21,"name":22,"slug":22,"posts_count":23},"6603f189559bb40f61d73dc8","beurer",180,{"_id":25,"name":26,"slug":26,"posts_count":27},"66a23a3fe0221e50e61db0cb","midea",153,{"_id":29,"name":30,"slug":30,"posts_count":31},"660804c989b73d8967d265f8","eufy",145,{"_id":33,"name":34,"slug":35,"posts_count":36},"6a9fb99d5c45270d9f9c206c","fisher&paykel","fisherpaykel",138,{"_id":38,"name":39,"slug":39,"posts_count":36},"65b98fa1d7d1d87020daed54","tp-link",{"_id":41,"name":42,"slug":42,"posts_count":43},"65b97c51fb1e5a098bef4260","hp",135,{"_id":45,"name":46,"slug":47,"posts_count":48},"6a7b3040d0a08570392cf78c","ge appliances","ge-appliances",131,{"_id":50,"name":51,"slug":51,"posts_count":52},"65b998aad7d1d87020daef72","cuisinart",127,{"_id":54,"name":55,"slug":55,"posts_count":56},"65b9640247dc48a130b9ba12","jbl",124,{"_id":58,"name":59,"slug":59,"posts_count":60},"65b982e8fb1e5a098bef4283","boss",114,{"_id":62,"name":63,"slug":63,"posts_count":64},"6603ffea432eb2c5716ffe24","craftsman",111,{"_id":66,"name":67,"slug":67,"posts_count":68},"6a7edd76a4ec6f30ae365cfd","carrier",102,{"_id":70,"name":71,"slug":71,"posts_count":72},"6a38da0635740ca1a7be5a67","neomounts",100,{"_id":74,"name":75,"slug":75,"posts_count":76},"65f9637e55041d5cae9e88db","garmin",99,{"_id":78,"name":79,"slug":79,"posts_count":80},"65b99806fb1e5a098bef4423","netgear",96,{"_id":82,"name":83,"slug":83,"posts_count":84},"6901d6bc1c83bca499ec173a","aiwa",93,{"_id":86,"name":87,"slug":87,"posts_count":88},"6a4debda47666dc6def30a08","miele",86,{"_id":90,"name":91,"slug":91,"posts_count":92},"6608037d6af97e2169c54699","breville",84,{"_id":94,"name":95,"slug":95,"posts_count":96},"660153a35f81e3a1279b2c70","vornado",82,{"_id":98,"name":99,"slug":99,"posts_count":100},"660cff91ca2fbf082a6fd56b","asus",80,{"_id":102,"name":103,"slug":103,"posts_count":100},"6606e00391396ca9bc11cbac","panasonic",{"statusCode":4,"message":105,"data":106},"Post found!",{"post":107,"relatedPosts":172,"linkTags":197},{"_id":108,"title":109,"full_title":110,"content":111,"status":112,"category":113,"category_name":115,"tags":118,"published_at":138,"pdf_type":139,"doc_type":136,"faqs":140,"show_pdf":165,"meta_description":166,"createdAt":167,"updatedAt":168,"firebase_pdf_path":169,"firebase_pdf_url":170,"permalink":117,"feature_image_url":117,"category_title":171,"id":108},"6aec45d9da602c71bb7decb1","ExpressCard Serial Adaptor EC2S55254","Startech.com ExpressCard Serial Adaptor EC2S55254 User Manual","\u003Cdiv class=\"container\">\n  \u003Ch2>StarTech.com ExpressCard Serial Adaptor EC2S55254 Manual\u003C\u002Fh2>\n  \u003Ch3>Introduction\u003C\u002Fh3>\n  \u003Cp>The \u003Cstrong>startech.com ExpressCard Serial Adaptor EC2S55254\u003C\u002Fstrong> adds two RS-232 serial ports to a compatible laptop through an available 54mm ExpressCard slot. It is designed for users who need dependable serial connectivity for industrial equipment, point-of-sale systems, networking hardware, scientific instruments, legacy peripherals, and configuration consoles.\u003C\u002Fp>\n  \u003Cp>Unlike many basic USB-to-serial adapters, this ExpressCard serial adapter uses two 16C450\u002F550-compatible UART ports and a 256-byte transmit and receive FIFO buffer. These features help maintain stable data handling when communicating with equipment that requires traditional COM-port behavior. The included breakout cable provides two male DB9 connectors, allowing both serial ports to remain accessible while the card stays installed in the laptop.\u003C\u002Fp>\n  \u003Cp>The adapter supports RS-232 communication at data rates up to 128 Kbps and provides configurable data bits, stop bits, parity, and flow-control settings. It is suitable for technicians, system integrators, field engineers, IT administrators, and users maintaining older computers or equipment that still depends on serial communication.\u003C\u002Fp>\n  \u003Cp>Before installation, confirm that the laptop has a standard ExpressCard\u002F54 slot. This product is intended for compatible ExpressCard systems and is not a direct replacement for USB, PCI, PCI Express, or ExpressCard\u002F34-only hardware. Because the model is discontinued in some regions, use the product ID EC2S55254 when locating archived manuals and drivers.\u003C\u002Fp>\n\n  \u003Ch2>Specifications of the EC2S55254 ExpressCard Serial Adapter\u003C\u002Fh2>\n  \u003Cul>\n    \u003Cli>\u003Cstrong>Product type:\u003C\u002Fstrong> Two-port RS-232 ExpressCard serial adapter.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Host interface:\u003C\u002Fstrong> ExpressCard 1.0a.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Card format:\u003C\u002Fstrong> ExpressCard\u002F54, measuring 54 mm wide.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Serial ports:\u003C\u002Fstrong> Two male DB9 RS-232 connectors through the included breakout cable.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>UART compatibility:\u003C\u002Fstrong> Two 16C450\u002F550-compatible UART serial ports.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Chipset:\u003C\u002Fstrong> MosChip MCS9922CV-AA.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Maximum serial speed:\u003C\u002Fstrong> Up to 128 Kbps.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>FIFO buffer:\u003C\u002Fstrong> 256 bytes for transmit and receive operations.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Data bits:\u003C\u002Fstrong> 5, 6, 7, 8, or 9.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Stop bits:\u003C\u002Fstrong> 1, 1.5, or 2.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Parity:\u003C\u002Fstrong> None, odd, even, mark, or space.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Flow control:\u003C\u002Fstrong> None or RTS\u002FCTS, depending on driver and application support.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Operating systems:\u003C\u002Fstrong> Compatibility varies by driver; supported platforms listed for this model include Windows, selected Mac OS versions, Windows Server editions, and Linux kernel 2.6.11 or later.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Included equipment:\u003C\u002Fstrong> ExpressCard adapter, breakout cable, and driver media where supplied with the original package.\u003C\u002Fli>\n  \u003C\u002Ful>\n\n  \u003Ch2>How to Install and Configure the StarTech.com ExpressCard Serial Adaptor EC2S55254\u003C\u002Fh2>\n  \u003Col>\n    \u003Cli>Shut down the laptop and disconnect external power if the manufacturer recommends doing so before inserting an ExpressCard.\u003C\u002Fli>\n    \u003Cli>Confirm that the computer has a 54mm ExpressCard slot. Do not force the card into a PC Card, CardBus, or incompatible ExpressCard\u002F34-only slot.\u003C\u002Fli>\n    \u003Cli>Insert the EC2S55254 into the slot with the connector orientation shown by the laptop or card label. Press gently until the card is fully seated.\u003C\u002Fli>\n    \u003Cli>Connect the supplied breakout cable to the adapter and attach the required DB9 serial cable or equipment.\u003C\u002Fli>\n    \u003Cli>Start the computer. When the operating system detects new hardware, install the driver package for EC2S55254 from the supplied media or the manufacturer’s support area.\u003C\u002Fli>\n    \u003Cli>Open Device Manager or the equivalent system utility and confirm that two serial ports appear without warning symbols.\u003C\u002Fli>\n    \u003Cli>In the application communicating with the equipment, select the correct COM port and match the device settings: baud rate, data bits, parity, stop bits, and flow control.\u003C\u002Fli>\n  \u003C\u002Fol>\n  \u003Cp>For reliable communication, use the equipment manufacturer’s documented serial settings and avoid connecting or disconnecting cables while an active transfer is in progress. Never insert the card while the slot or connector is visibly damaged, wet, or obstructed.\u003C\u002Fp>\n\n  \u003Ch2>EC2S55254 Troubleshooting Guide\u003C\u002Fh2>\n  \u003Ch3>Card is not detected\u003C\u002Fh3>\n  \u003Cp>Power off the laptop, remove the adapter, and inspect the ExpressCard slot for debris or damage. Reinsert the card firmly, restart the computer, and reinstall the correct EC2S55254 driver. If the laptop has multiple user profiles, install the driver with administrator permissions.\u003C\u002Fp>\n\n  \u003Ch3>No COM ports appear\u003C\u002Fh3>\n  \u003Cp>Check Device Manager for an unknown PCI or serial device. Remove any failed installation, restart the system, and install the driver package again. For discontinued products, search the manufacturer’s support area using the exact product number EC2S55254.\u003C\u002Fp>\n\n  \u003Ch3>Equipment does not communicate\u003C\u002Fh3>\n  \u003Cp>Verify that the application is using the correct COM port and that both devices have matching baud rate, parity, data bits, and stop bits. Test hardware flow control by selecting None or RTS\u002FCTS according to the connected equipment. Confirm that the cable is wired for RS-232 and that the equipment does not require a null-modem connection.\u003C\u002Fp>\n\n  \u003Ch3>Intermittent or corrupted data\u003C\u002Fh3>\n  \u003Cp>Lower the baud rate, shorten the cable, secure the DB9 connections, and keep serial wiring away from high-current power cables. A loopback test can help determine whether the adapter port is transmitting and receiving correctly.\u003C\u002Fp>\n\n  \u003Cp>No universal EC2S55254 error-code list is specified for this hardware. Record the operating system, driver version, Device Manager message, COM-port number, and connected equipment details before requesting assistance. Use the manufacturer’s driver-download and support pages for manuals, archived drivers, warranty questions, and technical help. Warranty coverage and service terms may depend on the original purchase channel and region.\u003C\u002Fp>\n\n  \u003Ch2>Pros and Cons of the StarTech.com ExpressCard Serial Adaptor EC2S55254\u003C\u002Fh2>\n  \u003Ch3>Advantages\u003C\u002Fh3>\n  \u003Cul>\n    \u003Cli>\u003Cstrong>Two serial ports:\u003C\u002Fstrong> Communicate with two RS-232 devices from one laptop slot, such as a network switch and an industrial controller.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Native ExpressCard design:\u003C\u002Fstrong> Uses the laptop’s ExpressCard interface rather than occupying a USB port.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Traditional UART behavior:\u003C\u002Fstrong> The 16C450\u002F550-compatible design suits software and equipment expecting standard COM-port operation.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Buffered data handling:\u003C\u002Fstrong> The 256-byte FIFO can help manage continuous serial transfers more reliably than very basic adapters.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Flexible configuration:\u003C\u002Fstrong> Supports common parity, data-bit, stop-bit, and flow-control options.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Practical breakout cable:\u003C\u002Fstrong> Places two male DB9 connections outside the laptop for easier equipment access.\u003C\u002Fli>\n  \u003C\u002Ful>\n\n  \u003Ch3>Limitations\u003C\u002Fh3>\n  \u003Cul>\n    \u003Cli>\u003Cstrong>Requires a 54mm ExpressCard slot:\u003C\u002Fstrong> Modern laptops commonly omit this interface, so USB or network-based serial hardware may be more suitable for newer computers.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>RS-232 only:\u003C\u002Fstrong> It is not a direct solution for RS-422, RS-485, USB, Ethernet, or parallel communication.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Legacy driver considerations:\u003C\u002Fstrong> Compatibility depends on the operating system and available driver package.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>Moderate maximum speed:\u003C\u002Fstrong> The 128 Kbps limit is appropriate for many control and configuration tasks but may not suit higher-speed serial applications.\u003C\u002Fli>\n    \u003Cli>\u003Cstrong>External cable required:\u003C\u002Fstrong> The breakout cable adds another connection that must be secured during field use.\u003C\u002Fli>\n  \u003C\u002Ful>\n  \u003Cp>The EC2S55254 is best suited to technicians and organizations maintaining ExpressCard-equipped laptops and RS-232 equipment. Users with modern USB-C-only computers, high-speed serial requirements, or RS-485 devices should choose hardware designed specifically for those interfaces.\u003C\u002Fp>\n\u003C\u002Fdiv>","published",{"_id":114,"name":115,"slug":116,"logo_url":117,"id":114},"6aeae5676388fb3e1f8cc68e","startech.com","startechcom",null,[119,121,124,127,131,134],{"_id":120,"name":115,"slug":116,"id":120},"6aeae60eda602c71bb7c64b2",{"_id":122,"name":123,"slug":123,"id":122},"6aec45d9da602c71bb7decab","ec1s1p55254",{"_id":125,"name":126,"slug":126,"id":125},"6aec45d9da602c71bb7decad","expresscard",{"_id":128,"name":129,"slug":130,"id":128},"6aec45d9da602c71bb7deca9","serial adaptor","serial-adaptor",{"_id":132,"name":133,"slug":133,"id":132},"6aec45d9da602c71bb7decaf","ec2s55254",{"_id":135,"name":136,"slug":137,"id":135},"65b9a88a00650ab013966931","user manual","user-manual","2026-11-05T09:01:13.771Z","short",[141,144,147,150,153,156,159,162],{"question":142,"answer":143},"How do I set up the startech.com ExpressCard Serial Adaptor EC2S55254 for the first time?","Insert the EC2S55254 into an available ExpressCard\u002F54 slot while the laptop is powered according to your computer’s ExpressCard instructions. Connect the included breakout cable, then attach your RS-232 devices to the two DB-9 serial connectors. Install the correct driver from the supplied disc or StarTech.com support page, restart the computer if prompted, and confirm both ports appear in Device Manager under Ports (COM and LPT).",{"question":145,"answer":146},"Which computers and operating systems are compatible with the startech.com ExpressCard Serial Adaptor EC2S55254?","The startech.com ExpressCard Serial Adaptor EC2S55254 is designed for laptops with an available 54 mm ExpressCard slot, not a standard PC Card or ExpressCard\u002F34-only slot. Documented operating-system support includes selected Windows versions, Mac OS X releases, and Linux systems with compatible drivers. Before installation, verify your laptop has the required slot and check StarTech.com’s current driver listing for your specific operating system.",{"question":148,"answer":149},"What should I do if the EC2S55254 is not detected by my laptop?","First, shut down the laptop, remove the EC2S55254, and inspect the ExpressCard slot and card connector for dust or visible damage. Reinsert the card firmly, reconnect the breakout cable, and check Device Manager for an unknown device or disabled serial ports. If Windows cannot find a driver, install the model-specific driver manually, then restart. Avoid forcing the card into a slot that does not support ExpressCard hardware.",{"question":151,"answer":152},"How can I identify and configure the two serial ports on the startech.com ExpressCard Serial Adaptor EC2S55254?","After driver installation, open Device Manager and expand Ports (COM and LPT). The adapter should expose two separate COM port entries, each with its own number. Open the properties for each port to view or change the COM assignment and communication settings. Match the selected COM number, baud rate, data bits, parity, stop bits, and flow control with the connected RS-232 equipment and its control software.",{"question":154,"answer":155},"What serial settings does the startech.com ExpressCard Serial Adaptor EC2S55254 support?","The EC2S55254 provides two RS-232 serial ports and supports configurable data formats, including common combinations of data bits, stop bits, and parity. Its maximum documented transfer rate is up to 128 Kbps, with a 256-byte FIFO buffer intended to help manage serial data efficiently. The connected device and application must use matching settings; incorrect baud rate or flow-control choices can cause corrupted, missing, or stalled communication.",{"question":157,"answer":158},"Why does my RS-232 device connected to the EC2S55254 show no data or communication errors?","Confirm that the application is using the correct COM port and that the device is connected to the intended DB-9 socket. Check whether the equipment requires a straight-through or null-modem cable, because RS-232 wiring differs between devices. Also compare baud rate, parity, data bits, stop bits, and flow control on both ends. If supported by your equipment, test with a known-good cable or perform a serial loopback test.",{"question":160,"answer":161},"Can I use the EC2S55254 with industrial equipment, GPS receivers, or legacy serial software?","The EC2S55254 can be suitable for equipment and applications that communicate through standard RS-232 ports, such as configuration consoles, industrial controllers, and some legacy peripherals. Compatibility depends on the device’s connector wiring, electrical requirements, COM-port access, and operating-system driver support. Confirm that the equipment does not require RS-422, RS-485, TTL serial, or a proprietary interface, because this adapter is intended for RS-232 communication.",{"question":163,"answer":164},"How should I maintain and safely remove the startech.com ExpressCard Serial Adaptor EC2S55254?","Keep the EC2S55254 and its breakout connector dry, dust-free, and protected from excessive bending or pulling on the cable. Disconnect attached serial equipment before removing the adapter, close applications using its COM ports, and use the operating system’s safe removal option when available. Do not insert or remove the card while applying force. Store it in an anti-static bag or protective case when it is not installed.",true,"startech.com ExpressCard Serial Adaptor EC2S55254 adds dual RS232 ports, 128Kbps speeds, and a 256-byte FIFO buffer for reliable laptop connectivity.","2026-11-05T09:01:13.772Z","2026-11-05T09:01:14.253Z","posts\u002F6aec45d9da602c71bb7decb1\u002Fpdf\u002Fexpresscard_serial_adaptor_ec2s55254_user_manual.pdf","https:\u002F\u002Fmanualsfact.com\u002Fmedia\u002Fposts\u002F6aec45d9da602c71bb7decb1\u002Fpdf\u002Fexpresscard_serial_adaptor_ec2s55254_user_manual.pdf","startech.com - ExpressCard Serial Adaptor EC2S55254",[173,177,181,185,189,193],{"title":174,"full_title":175,"slug":176},"1S1P Mini PCI Express Serial Parallel Card 16950 PEX1S1PMINI","Startech.com 1S1P Mini PCI Express Serial Parallel Card 16950 PEX1S1PMINI User Manual","startechcom-1s1p-mini-pci-express-serial-parallel-card-16950-pex1s1pmini-user-manual",{"title":178,"full_title":179,"slug":180},"USB To Serial Adapter Cable With COM Retention ICUSB2321X","Startech.com USB To Serial Adapter Cable With COM Retention ICUSB2321X User Manual","startechcom-usb-to-serial-adapter-cable-with-com-retention-icusb2321x-user-manual",{"title":182,"full_title":183,"slug":184},"PEX1S1P952 Parallel PCI Express Combo Card","Startech.com PEX1S1P952 Parallel PCI Express Combo Card User Manual","startechcom-pex1s1p952-parallel-pci-express-combo-card-user-manual",{"title":186,"full_title":187,"slug":188},"12U Slide-out Rotating Server Rack PORACK12U","Startech.com 12U Slide-out Rotating Server Rack PORACK12U User Manual","startechcom-12u-slide-out-rotating-server-rack-porack12u-user-manual",{"title":190,"full_title":191,"slug":192},"Dual Rail LCD Console RACKCOND17HD","Startech.com Dual Rail LCD Console RACKCOND17HD","startechcom-dual-rail-lcd-console-rackcond17hd",{"title":194,"full_title":195,"slug":196},"Deep Vented Server Room Equipment Wall Mount Shelf WALLSHELF","Startech.com Deep Vented Server Room Equipment Wall Mount Shelf WALLSHELF User Manual","startechcom-deep-vented-server-room-equipment-wall-mount-shelf-wallshelf-user-manual",[198,199],{"name":115,"slug":116},{"name":136,"slug":137},{"statusCode":4,"message":201,"data":202},"Found all comments!",[]]