{"product_id":"ugreen-20145-db9-rs232-extension-cable-1-5m","title":"UGREEN 20145 DB9 RS232 Extension Cable, 1.5m","description":"\u003cstyle\u003e\/* UGREEN India product description layout *\/\n.ugd-story { --ugd-acc: #169b45; --ugd-ink: #14181c; --ugd-text: #4a5258; --ugd-line: #e3e6e8; --ugd-soft: #f4f5f6; color: var(--ugd-ink); font: 16px \/ 1.7 -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Arial, sans-serif; width: 100%; max-width: 1200px; margin: 0px auto; container-type: inline-size; text-align: left; overflow-wrap: anywhere; }\n.ugd-story * { box-sizing: border-box; }\n.ugd-story :is(h2, h3, h4, p, figure, ul, ol, dl, dd) { margin: 0px; padding: 0px; }\n.ugd-story :is(h2, h3, h4) { color: var(--ugd-ink); font-weight: 700; letter-spacing: -0.02em; text-transform: none; }\n.ugd-story h2 { font-size: clamp(26px, 4.2cqi, 42px); line-height: 1.15; }\n.ugd-story h3 { font-size: clamp(21px, 3cqi, 30px); line-height: 1.2; }\n.ugd-story h4 { font-size: 18px; line-height: 1.35; 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max-width: 780px; }\n.ugd-story .ugd-stats.ugd-s2 { grid-template-columns: 1fr 1fr; }\n.ugd-story .ugd-uses figcaption, .ugd-story figure figcaption { color: var(--ugd-ink); }\n.ugd-story .ugd-box.ugd-noimg { grid-template-columns: 1fr; }\n.product-details rte-formatter \u003e .ugd-wide { max-width: none !important; width: 100% !important; }\n.product-details rte-formatter \u003e .ugd-story.ugd-wide { max-width: 1200px !important; }\n.ugd-story ul.ugd-nav,.ugd-story ul.ugd-chips,.ugd-story ul.ugd-trust{list-style:none!important;padding-left:0!important;margin-left:0!important}.ugd-story ul.ugd-nav li,.ugd-story ul.ugd-chips li,.ugd-story ul.ugd-trust li{list-style:none!important}.ugd-story ul.ugd-nav li::before,.ugd-story ul.ugd-chips li::before,.ugd-story ul.ugd-trust li::before,.ugd-story ul.ugd-nav li::marker,.ugd-story ul.ugd-chips li::marker{content:none!important;display:none!important}\n\u003c\/style\u003e\u003cdiv class=\"ugd-story ugd-wide\"\u003e\n\u003cheader class=\"ugd-hero\"\u003e\u003cdiv\u003e\n\u003cspan class=\"ugd-eyebrow\"\u003e01 · Product introduction\u003c\/span\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eUGREEN 20145 DB9 RS232 Extension Cable, 1.5m adds 1.5m of reach to compatible DB9 RS232 equipment. One end is male and the other female, with screw hardware to retain the connection.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/header\u003e\u003cdiv class=\"ugd-stats\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e1.5m\u003c\/b\u003e\u003cspan\u003eLength\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003eDB9 male\u003c\/b\u003e\u003cspan\u003eConnector A\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003eDB9 female\u003c\/b\u003e\u003cspan\u003eConnector B\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e110g listing value\u003c\/b\u003e\u003cspan\u003eListing weight\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cnav\u003e\u003cul class=\"ugd-nav\"\u003e\n\u003cli\u003e\u003ca href=\"#ugd-features\"\u003eFeatures\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#ugd-specs\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#ugd-faqs\"\u003eFAQs\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/nav\u003e\u003cdiv class=\"ugd-section\" id=\"ugd-features\"\u003e\n\u003cdiv class=\"ugd-head\"\u003e\n\u003cspan class=\"ugd-eyebrow\"\u003eFeatures\u003c\/span\u003e\u003ch3\u003eWhat it does well.\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eKey features\u003c\/h4\u003e\n\u003cp\u003e02 · At a glance\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDB9 male to female.\u003c\/b\u003e RS232 does not have one universal speed guaranteed by a passive cable. Baud rate, cable length, capacitance, grounding, noise, transmitter strength and receiver tolerance determine reliable operation.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eStraight-through.\u003c\/b\u003e Both endpoints must use RS232 voltage levels and compatible DB9 pin assignments. A DB9 shell is also used for other protocols, proprietary control ports and CAN or RS485 wiring, so shape alone is not proof.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eShielded.\u003c\/b\u003e RS232 defines electrical signalling and interface behaviour, while DB9 describes the connector form. The two terms are related in many PCs but are not interchangeable proof of compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e1.5m.\u003c\/b\u003e No driver belongs to this passive cable. A built-in COM port uses the operating system's serial driver; a USB-to-serial adapter needs the correct chipset driver for the host OS and architecture.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eConnectors, direction and interface clarity\u003c\/h4\u003e\n\u003cp\u003e03 · Physical fit\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDB9 male.\u003c\/b\u003e Nine exposed contacts in a D-sub shell. Confirm the mating equipment expects this gender and an RS232 electrical interface.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDB9 female.\u003c\/b\u003e Nine contact sockets in a matching D-sub shell. The male-to-female layout extends a port; it does not determine data direction by itself.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eScrew hardware.\u003c\/b\u003e Retaining screws\/posts support a secure installed connection. Thread type and mating-post condition must match the equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eShielded PVC cable.\u003c\/b\u003e Foil shielding and the jacket help with interference and handling, but they cannot correct a ground loop, wrong pinout or incompatible voltage standard.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eSignal, data or power performance\u003c\/h4\u003e\n\u003cp\u003e04 · Capability\u003c\/p\u003e\n\u003cp\u003eRS232 does not have one universal speed guaranteed by a passive cable. Baud rate, cable length, capacitance, grounding, noise, transmitter strength and receiver tolerance determine reliable operation.\u003c\/p\u003e\n\u003cp\u003eUse the 1.5m cable at the baud rate documented by both devices. Start at a conservative rate during commissioning, then increase only after error-free testing with the actual equipment.\u003c\/p\u003e\n\u003cp\u003eHardware flow control can require RTS\/CTS or DTR\/DSR lines in addition to TX, RX and ground. Because the published abbreviated pin list is irregular, confirm required control lines with the equipment and continuity documentation.\u003c\/p\u003e\n\u003cp\u003eThe cable carries the serial electrical signals already present. It has no buffer, isolation, surge suppression, level shifter, chipset or indicator lights.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eWhat the entire connection must support\u003c\/h4\u003e\n\u003cp\u003e05 · Complete path\u003c\/p\u003e\n\u003cp\u003eBoth endpoints must use RS232 voltage levels and compatible DB9 pin assignments. A DB9 shell is also used for other protocols, proprietary control ports and CAN or RS485 wiring, so shape alone is not proof.\u003c\/p\u003e\n\u003cp\u003eStraight-through means corresponding pins continue end to end. Equipment expecting a null-modem crossover requires a different cable or adapter with the specific crossed lines.\u003c\/p\u003e\n\u003cp\u003eGround potential between separated equipment can cause communication errors or damage. In industrial installations, follow the equipment maker's grounding and isolation instructions rather than relying on cable shielding.\u003c\/p\u003e\n\u003cp\u003eA USB-to-RS232 converter may be used elsewhere in a correctly designed chain, but its chipset, driver, connector gender and pinout remain separate compatibility decisions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eStandards, negotiation and operating roles\u003c\/h4\u003e\n\u003cp\u003e06 · Behaviour\u003c\/p\u003e\n\u003cp\u003eRS232 defines electrical signalling and interface behaviour, while DB9 describes the connector form. The two terms are related in many PCs but are not interchangeable proof of compatibility.\u003c\/p\u003e\n\u003cp\u003eDTE and DCE conventions affect which device transmits on which pin and whether male\/female connectors mate directly. Consult both device manuals instead of assuming that connector gender reveals DTE\/DCE role.\u003c\/p\u003e\n\u003cp\u003eThe passive extension has no operating-system presence and needs no driver. The host COM port or USB serial adapter can require a driver and application-specific baud, parity, data-bit, stop-bit and flow-control settings.\u003c\/p\u003e\n\u003cp\u003eShielding can reduce coupled interference, but RS232 remains a single-ended interface. It is not a substitute for galvanic isolation, differential RS422\/RS485 wiring or an installation designed for long noisy runs.\u003c\/p\u003e\n\u003cp\u003eCeiling, not a promise\u003c\/p\u003e\n\u003cp\u003eA connector or standard label describes capability. The complete source, destination, cable route, software and negotiated mode determine the real result.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eCompatible devices and systems\u003c\/h4\u003e\n\u003cp\u003e07 · Device fit\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLegacy PC COM ports.\u003c\/b\u003e Only real RS232 DB9 ports whose gender and pinout match the extension path.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIndustrial and test equipment.\u003c\/b\u003e Controllers, instruments, CNC\/POS or diagnostic devices after verifying RS232 levels and every required pin.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSerial peripherals.\u003c\/b\u003e Modems, scanners, printers, plotters, barcode or embroidery equipment only when the maker specifies compatible DB9 RS232.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eUSB serial chains.\u003c\/b\u003e Conditional: the converter, driver, DB9 gender and pinout must already work before this passive extension is added.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eUse scenarios\u003c\/h4\u003e\n\u003cp\u003e08 · Practical value\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEquipment relocation.\u003c\/b\u003e Add 1.5m between an existing COM port and nearby serial equipment without changing the interface.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eService access.\u003c\/b\u003e Bring a recessed DB9 connection to an accessible panel while retaining screw locks.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBench testing.\u003c\/b\u003e Connect compatible instruments or controllers during commissioning with a known straight-through extension.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCable-management route.\u003c\/b\u003e Move a working serial connection around a rack or workstation while respecting grounding, bend radius and strain relief.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-box ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eSetup and usability guidance\u003c\/h4\u003e\n\u003cp\u003e09 · Usability\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRead both equipment manuals and record connector gender, RS232 voltage standard, straight-through\/null-modem requirement and every signal line in use.\u003c\/li\u003e\n\u003cli\u003eStop communication and, where the device maker recommends it, power down equipment before connecting or disconnecting the DB9 plugs.\u003c\/li\u003e\n\u003cli\u003eAlign the D-sub shell, seat the connector straight and tighten both retention screws evenly by hand.\u003c\/li\u003e\n\u003cli\u003eTest basic communication at a conservative baud rate, then verify bidirectional traffic and hardware-handshake behaviour under the real workload.\u003c\/li\u003e\n\u003cli\u003eRoute away from high-current, motor and switching-power wiring; secure the jacket so machinery or users cannot pull on the DB9 ports.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eOperating-system, driver and software guidance\u003c\/h4\u003e\n\u003cp\u003e10 · Host behaviour\u003c\/p\u003e\n\u003cp\u003eNo driver belongs to this passive cable. A built-in COM port uses the operating system's serial driver; a USB-to-serial adapter needs the correct chipset driver for the host OS and architecture.\u003c\/p\u003e\n\u003cp\u003eApplications must open the correct COM port with matching serial parameters. A successful physical connection does not prove that baud, parity, stop bits, flow control or device address are correct.\u003c\/p\u003e\n\u003cp\u003eIf data appears as random characters, verify serial settings before replacing the cable. If there is no traffic, verify TX\/RX roles and whether the equipment expects straight-through or null-modem wiring.\u003c\/p\u003e\n\u003cp\u003eSoftware boundary\u003c\/p\u003e\n\u003cp\u003eThe passive product has no firmware or driver. Connected hosts, adapters and peripherals can still require model software, permissions or settings.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eWhat this product does\u003c\/h4\u003e\n\u003cp\u003e11 · scope\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdds 1.5m to a compatible DB9 RS232 male-to-female path.\u003c\/li\u003e\n\u003cli\u003ePreserves a straight-through serial connection as identified by UGREEN.\u003c\/li\u003e\n\u003cli\u003eProvides screw retention at the D-sub connectors.\u003c\/li\u003e\n\u003cli\u003eUses a shielded multi-conductor cable with a flexible PVC jacket.\u003c\/li\u003e\n\u003cli\u003eOperates passively without a cable-specific driver or power supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eWhat this product does not do\u003c\/h4\u003e\n\u003cp\u003e12 · Clear boundaries\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt is not a null-modem\/crossover cable and does not intentionally swap TX\/RX or handshake lines.\u003c\/li\u003e\n\u003cli\u003eIt does not convert USB, Ethernet, TTL UART, RS422, RS485, CAN or another protocol to RS232.\u003c\/li\u003e\n\u003cli\u003eIt does not add a COM-port chipset, driver, electrical isolation, surge protection or signal amplification.\u003c\/li\u003e\n\u003cli\u003eIt cannot correct incompatible DTE\/DCE roles, pinouts, baud settings or voltage levels.\u003c\/li\u003e\n\u003cli\u003eA DB9 connector alone does not guarantee RS232; proprietary DB9 interfaces must not be connected without documentation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eWhat to do\u003c\/h4\u003e\n\u003cp\u003e13 · Best practice\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRecommended.\u003c\/b\u003e Verify RS232 electrical levels, DB9 genders, straight-through wiring and required handshake pins in both manuals.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRecommended.\u003c\/b\u003e Tighten both screws evenly and support the cable near fixed equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRecommended.\u003c\/b\u003e Commission at a conservative baud rate and test real bidirectional data plus flow control.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRecommended.\u003c\/b\u003e Use proper isolation or differential conversion where grounding, distance or electrical noise requires it.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eWhat not to do\u003c\/h4\u003e\n\u003cp\u003e14 · Common mistakes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAvoid.\u003c\/b\u003e Do not connect unknown DB9 ports solely because the plugs fit.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAvoid.\u003c\/b\u003e Do not use this extension where a null-modem crossover is specified.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAvoid.\u003c\/b\u003e Do not hot-plug industrial equipment unless both manufacturers explicitly permit it.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAvoid.\u003c\/b\u003e Do not route beside motors, relays, high-current conductors or sharp moving machinery without appropriate engineering controls.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eWarnings and limitations\u003c\/h4\u003e\n\u003cp\u003e15 · Read before use\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWarning \/ limitation 1.\u003c\/b\u003e RS232 ports can use voltages unsafe for TTL UART pins. Never connect directly to bare microcontroller headers without the correct level translator.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWarning \/ limitation 2.\u003c\/b\u003e Ground-potential differences can damage ports or corrupt data. Follow equipment guidance on earthing and isolated interfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWarning \/ limitation 3.\u003c\/b\u003e At 1.5m, reliable baud rate remains installation-dependent. Shielding does not guarantee operation in a high-noise environment.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWarning \/ limitation 4.\u003c\/b\u003e Inspect screw posts, shells and cable jacket before use. Stop using a cable with bent contacts, cracked moulding, exposed conductors or intermittent movement sensitivity.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"ugd-feature ugd-rev ugd-noimg\"\u003e\u003cdiv\u003e\n\u003ch4\u003eTroubleshooting by symptom\u003c\/h4\u003e\n\u003cp\u003e16 · Diagnostics\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNo communication.\u003c\/b\u003e Verify the correct COM port, identical serial settings, RS232 voltage levels, gender, pinout and straight-through requirement; then test directly without the extension.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGarbled characters.\u003c\/b\u003e Match baud, parity, data bits and stop bits, reduce the baud rate and move the cable away from electrical noise.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTransmit works one way only.\u003c\/b\u003e Check TX\/RX roles, null-modem versus straight-through requirement and whether flow-control lines are required or asserted.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIntermittent disconnects.\u003c\/b\u003e Tighten both screws evenly, support the cable, inspect contacts and test for ground\/noise problems with the equipment maker's recommended method.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ugd-section\" id=\"ugd-specs\"\u003e\n\u003cdiv class=\"ugd-head\"\u003e\n\u003cspan class=\"ugd-eyebrow\"\u003eSpecifications\u003c\/span\u003e\u003ch3\u003eAt a glance.\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdl class=\"ugd-specs\"\u003e\n\n\u003cdiv\u003e\n\u003cdt\u003eProduct\u003c\/dt\u003e\n\u003cdd\u003eUGREEN DB9 RS232 extension cable\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eSKU\u003c\/dt\u003e\n\u003cdd\u003e20145\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLength\u003c\/dt\u003e\n\u003cdd\u003e1.5m\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eConnector A\u003c\/dt\u003e\n\u003cdd\u003eDB9 male\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eConnector B\u003c\/dt\u003e\n\u003cdd\u003eDB9 female\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eWiring role\u003c\/dt\u003e\n\u003cdd\u003eStraight-through extension per UGREEN\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eElectrical protocol\u003c\/dt\u003e\n\u003cdd\u003eRS232 only when endpoints are compatible\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eShielding\u003c\/dt\u003e\n\u003cdd\u003eAluminium-foil shielding listed; multi-conductor cutaway shown\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eJacket\u003c\/dt\u003e\n\u003cdd\u003eFlexible PVC\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRetention\u003c\/dt\u003e\n\u003cdd\u003eScrew-lock hardware\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eDriver \/ power\u003c\/dt\u003e\n\u003cdd\u003eNone for cable\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eListing weight\u003c\/dt\u003e\n\u003cdd\u003e110g listing value\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\n\u003cp class=\"ugd-note\"\u003e17 · data\u003c\/p\u003e\n\u003cp class=\"ugd-note\"\u003eConfirm the sealed SKU and included-item list. Devices, converters, chargers, cables or mounting accessories are not included unless explicitly listed above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ugd-section\" id=\"ugd-faqs\"\u003e\n\u003cdiv class=\"ugd-head\"\u003e\n\u003cspan class=\"ugd-eyebrow\"\u003eFAQs\u003c\/span\u003e\u003ch3\u003eQuestions buyers ask.\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this a USB-to-serial adapter?\u003c\/summary\u003e\u003cp\u003eNo. It has DB9 connectors at both ends and contains no USB chipset, COM-port electronics or driver. It only extends an already compatible RS232 path.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs it a null-modem cable?\u003c\/summary\u003e\u003cp\u003eNo. UGREEN identifies it as straight-through. Equipment requiring crossed TX\/RX or handshake lines needs the correct null-modem wiring instead.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes male-to-female tell me the data direction?\u003c\/summary\u003e\u003cp\u003eNo. Connector gender helps it mate as an extension, while DTE\/DCE roles and pin assignments determine data direction. Read both equipment manuals.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill it work with every DB9 port?\u003c\/summary\u003e\u003cp\u003eNo. DB9 is only a connector shell. Ports can carry RS232, RS422\/485, CAN, proprietary control signals or other pinouts and voltage levels.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the cable need a driver?\u003c\/summary\u003e\u003cp\u003eNo. A USB-to-serial adapter elsewhere in the chain can require a chipset driver, and the application still needs the correct COM-port settings.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat baud rate does it support?\u003c\/summary\u003e\u003cp\u003eUGREEN does not publish one universal guaranteed baud rate for this passive extension. Reliable speed depends on both devices, length, wiring, grounding, noise and settings.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre all nine pins wired?\u003c\/summary\u003e\u003cp\u003eUGREEN describes the cable as straight-through but the India page's printed pin list is abbreviated. Confirm every required data and handshake line for safety-critical or specialised equipment.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use it for TTL UART, RS485 or RS422?\u003c\/summary\u003e\u003cp\u003eNo direct compatibility should be assumed. Those interfaces use different electrical levels or signalling and require the correct translator or differential hardware.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhy do I see random characters?\u003c\/summary\u003e\u003cp\u003eThe most common causes are mismatched baud, parity, data bits or stop bits. Also check grounding, noise and whether the correct COM port is open.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow should I connect and secure it?\u003c\/summary\u003e\u003cp\u003eAlign and seat each DB9 connector straight, then finger-tighten both screws evenly. Do not use the screws to draw a misaligned connector into place.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is included?\u003c\/summary\u003e\u003cp\u003eOne UGREEN 20145 1.5m DB9 male-to-female RS232 extension cable. Serial converters, null-modem adapters, isolators and equipment are not included.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript\u003e(function(){function m(){var s=document.querySelector(\".ugd-story,.ht-story,.ava-story\");if(!s)return;var d=s.closest(\".product-block--description\");var a=document.querySelector(\"article.product--outer\");if(!d||!a||d.closest(\".ugd-fullwrap\"))return;var w=document.createElement(\"div\");w.className=\"ugd-fullwrap\";w.style.cssText=\"max-width:1200px;margin:40px auto 0;padding:0 24px;box-sizing:border-box;width:100%\";w.appendChild(d);a.parentNode.insertBefore(w,a.nextSibling);}if(document.readyState!==\"loading\")m();else document.addEventListener(\"DOMContentLoaded\",m);})();\u003c\/script\u003e","brand":"UGREEN","offers":[{"title":"Default Title","offer_id":41981376626787,"sku":"20145","price":409.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0581\/3780\/4899\/files\/51GUW6D3uUL._SL1200__1.jpg?v=1763829113","url":"https:\/\/www.ugreenindia.com\/products\/ugreen-20145-db9-rs232-extension-cable-1-5m","provider":"Ugreen India","version":"1.0","type":"link"}