{"product_id":"st-nctl210-network-serial-port-expander","title":"ST-NCTL210 Network Serial Port Expander","description":"\u003cstyle\u003e\n  .amp-spec-wrap { width: 80%; margin: 0 auto; font-family: Arial, sans-serif; font-size: 14px; color: #222; }\n  .amp-spec-wrap h2 { font-size: 16px; margin: 28px 0 8px; border-bottom: 2px solid #222; padding-bottom: 4px; text-align: center; }\n  .amp-spec-wrap h3 { font-size: 14px; margin: 18px 0 6px; }\n  .amp-spec-wrap table { width: 100%; border-collapse: collapse; margin: 0 auto 12px auto; font-size: 12px; }\n  .amp-spec-wrap th { background: #333; color: #fff; text-align: left; padding: 4px 7px; font-size: 12px; }\n  .amp-spec-wrap td { padding: 4px 7px; border: 1px solid #ccc; vertical-align: top; }\n  .amp-spec-wrap tr:nth-child(even) td { background: #f5f5f5; }\n  .amp-spec-wrap .group td { background: #e0e0e0; font-weight: bold; font-size: 12px; }\n  .amp-spec-wrap td:first-child { font-weight: bold; width: 35%; }\n\n   ── IMAGE SIZING ── adjust width values to resize each image ── ,\n  .amp-spec-wrap img { display: block; margin: 8px auto; height: auto; }\n  .amp-spec-wrap .img-front-panel  { width: 75%; }\n  .amp-spec-wrap .img-app-example  { width: 75%; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"amp-spec-wrap\"\u003e\n\u003cp\u003eST-NCTL210 Network Serial Port Expander is a professional RS-232, RS-422 and RS-485 serial device server designed for reliable serial-to-Ethernet communication in commercial AV and automation systems. The ST-NCTL210 Network Serial Port Expander features four serial ports, four relay outputs, TCP\/IP and UDP communication, built-in web server, API control, and 100M Ethernet connectivity for seamless integration with AMX, Crestron, RTI and third-party control systems. Designed for conference rooms, classrooms, industrial automation, control rooms, and commercial AV installations, the ST-NCTL210 Network Serial Port Expander delivers stable communication, flexible protocol conversion, and dependable network-based serial control. The ST-NCTL210 Network Serial Port Expander provides professional performance, simple configuration, and reliable operation for demanding control applications.\u003c\/p\u003e\n\u003cp\u003eST-NCTL210 Network Serial Port Expander is a professional RS-232, RS-422 and RS-485 serial communication solution designed for reliable serial-to-Ethernet integration in commercial AV, automation, and control systems. The ST-NCTL210 Network Serial Port Expander features four extended serial ports, four relay outputs, TCP\/IP and UDP communication, a built-in web server, API command control, and 10\/100M Ethernet connectivity for seamless integration with AMX, Crestron, RTI, and third-party control platforms. Designed for conference rooms, classrooms, industrial automation, command centers, smart buildings, and commercial AV installations, the ST-NCTL210 Network Serial Port Expander delivers stable communication, flexible protocol conversion, and dependable network-based device control. The ST-NCTL210 Network Serial Port Expander provides professional performance, simple configuration, and reliable operation for demanding automation and serial control applications.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e☆ 4 extended serial ports — COM1 \u0026amp; COM2 support RS-232 \/ RS-232+HW Flow \/ RS-422 \/ RS-485; COM3 \u0026amp; COM4 support RS-232 \/ RS-232+HW Flow\u003cbr\u003e☆ Universal baud rates: 2400, 4800, 9600, 14400, 19200, 38400, 56000, 57600, 115200\u003cbr\u003e☆ Full frame buffering — large TX\/RX buffer per port; data queue support; up to 512 bytes per frame\u003cbr\u003e☆ TCP \u0026amp; UDP transparent — COM1–4 TCP ports 8001–8004; UDP local ports 9001–9004; system port 8005 \/ 9005\u003cbr\u003e☆ 4 independent relay ports — normally-open contacts, isolated, rated up to 1A \/ 24V DC\/AC\u003cbr\u003e☆ Built-in web server — configure from any browser on PC, tablet or mobile; no software required\u003cbr\u003e☆ 100M Ethernet + RS-232 — compatible with AMX, Crestron, RTI and all third-party control systems\u003cbr\u003e☆ API command control — full ASCII command set over serial or TCP\/UDP for system integration\u003cbr\u003e☆ Device name support — rename\/remark the device name (max 8 characters)\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e① 1x Network Serial Port Expander\u003cbr\u003e② 2x 5pin-3.81mm Phoenix Connector (male)\u003cbr\u003e③ 2x 7pin-3.81mm Phoenix Connector (male)\u003cbr\u003e④ 1x 8pin-3.81mm Phoenix Connector (male)\u003cbr\u003e⑤ 2x 9pin-3.81mm Phoenix Connector (male)\u003cbr\u003e⑥ 4x Machine Screw\u003cbr\u003e⑦ 2x Mounting Ear\u003cbr\u003e⑧ 1x 24V\/1A Power Adaptor + 2pin-3.5mm Phoenix Connector\u003cbr\u003e⑨ 1x User Manual\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr class=\"group\"\u003e\u003ctd colspan=\"2\"\u003eTechnical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-232\u003c\/td\u003e\n\u003ctd\u003eFull duplex; configurable hardware flow control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-422\u003c\/td\u003e\n\u003ctd\u003eFull duplex communication mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-485\u003c\/td\u003e\n\u003ctd\u003eHalf duplex communication mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e2400 \/ 4800 \/ 9600 \/ 14400 \/ 19200 \/ 38400 \/ 56000 \/ 57600 \/ 115200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLAN\u003c\/td\u003e\n\u003ctd\u003e10\/100M Ethernet interface (RJ45)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Output\u003c\/td\u003e\n\u003ctd\u003e4x normally-open, isolated — up to 1A \/ 24V DC\/AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"group\"\u003e\u003ctd colspan=\"2\"\u003eConnection\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003ctd\u003e1x LAN [RJ45]\u003cbr\u003e1x MAIN COM [7pin-3.81mm phoenix connector]\u003cbr\u003e1x DC 24V [2pin phoenix connector]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003e1x NEXT COM [7pin-3.81mm phoenix connector, cascade output]\u003cbr\u003e1x COM 1 [9pin-3.81mm phoenix connector, RS-232\/422\/485]\u003cbr\u003e1x COM 2 [9pin-3.81mm phoenix connector, RS-232\/422\/485]\u003cbr\u003e1x COM 3 [5pin-3.81mm phoenix connector, RS-232]\u003cbr\u003e1x COM 4 [5pin-3.81mm phoenix connector, RS-232]\u003cbr\u003e1x RELAY OUTPUT [8pin-3.81mm phoenix connector]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"group\"\u003e\u003ctd colspan=\"2\"\u003eMechanical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing\u003c\/td\u003e\n\u003ctd\u003eMetal Enclosure — Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e147mm [W] × 130mm [D] × 42mm [H]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e673g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eInput: AC100–240V 50\/60Hz; Output: DC 24V \/ 1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption (Max)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C ~ 40°C \/ 32°F ~ 104°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C ~ 60°C \/ -4°F ~ 140°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd\u003e20%~90% (relative humidity, non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eOperation Controls and Functions\u003c\/h2\u003e\n\u003ch3\u003eFront Panel\u003c\/h3\u003e\n\u003cimg class=\"img-front-panel\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0802\/0410\/3901\/files\/Screenshot_2026-06-08_130040.png?v=1780912959\" alt=\"Front Panel\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:8%;\"\u003eNo.\u003c\/th\u003e\n\u003cth style=\"width:22%;\"\u003eName\u003c\/th\u003e\n\u003cth\u003eFunction Description\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eLAN LED (Green)\u003c\/td\u003e\n\u003ctd\u003eNetwork connection indicator — flashes when network communication is active.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003ePOWER LED (Green)\u003c\/td\u003e\n\u003ctd\u003eOn when the device is powered up.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eRELAY LEDs (Green × 4)\u003c\/td\u003e\n\u003ctd\u003eRelay status indicator for each of the 4 relay channels — stays on when the corresponding relay is set to closed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eTX\/RX LEDs (MAIN, COM1–COM4)\u003c\/td\u003e\n\u003ctd\u003eData activity indicators for each serial port — red flashes on transmit (TX), yellow flashes on receive (RX).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eRear Panel\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:8%;\"\u003eNo.\u003c\/th\u003e\n\u003cth style=\"width:22%;\"\u003eName\u003c\/th\u003e\n\u003cth\u003eFunction Description\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eDC 24V Port\u003c\/td\u003e\n\u003ctd\u003eDC 24V \/ 1A power input via 2pin phoenix connector.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eRESET Button\u003c\/td\u003e\n\u003ctd\u003eHold for 5 seconds to restore factory default settings. IP address restores to 192.168.1.100.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003eLAN Port\u003c\/td\u003e\n\u003ctd\u003e10\/100M network port (RJ45). Use a direct (straight-through) UTP cable — do not use a crossover cable.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003eMAIN COM Port\u003c\/td\u003e\n\u003ctd\u003eMain serial port for connection to a central control system or PC. 7pin phoenix connector.\u003cbr\u003eRS-232: PIN5=GND, PIN6=TXD, PIN7=RXD\u003cbr\u003eRS-422: PIN1=RX−, PIN2=RX+, PIN3=TX−, PIN4=TX+, PIN5=GND\u003cbr\u003eRS-485: Short PIN1(RX−)+PIN3(TX−) → B; PIN2(RX+)+PIN4(TX+) → A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003eNEXT COM Port\u003c\/td\u003e\n\u003ctd\u003eMain serial port cascade output — same pin-out as MAIN COM. Used to daisy-chain additional units.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003eRELAY OUTPUT Port\u003c\/td\u003e\n\u003ctd\u003e4x independent, isolated, normally-open relay contacts via 8pin phoenix connector. Maximum rating: 1A \/ 24V DC\/AC.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003eCOM1 \u0026amp; COM2 Ports\u003c\/td\u003e\n\u003ctd\u003eExtended serial ports 1 and 2. 9pin phoenix connector. Support RS-232+HW Flow \/ RS-422 \/ RS-485.\u003cbr\u003ePIN1=RX−, PIN2=RX+, PIN3=TX−, PIN4=TX+, PIN5=GND, PIN8=RTS, PIN9=CTS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eCOM3 \u0026amp; COM4 Ports\u003c\/td\u003e\n\u003ctd\u003eExtended serial ports 3 and 4. 5pin phoenix connector. Support RS-232+HW Flow only.\u003cbr\u003ePIN5=GND, PIN6=TXD, PIN7=RXD, PIN8=RTS, PIN9=CTS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDefault Network \u0026amp; Port Settings\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Address\u003c\/td\u003e\n\u003ctd\u003e192.168.1.100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubnet Mask\u003c\/td\u003e\n\u003ctd\u003e255.255.255.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGateway\u003c\/td\u003e\n\u003ctd\u003e192.168.1.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Mode\u003c\/td\u003e\n\u003ctd\u003eDHCP OFF (static)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTCP\/UDP Mode\u003c\/td\u003e\n\u003ctd\u003eTCP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM1–4 TCP Ports\u003c\/td\u003e\n\u003ctd\u003e8001 \/ 8002 \/ 8003 \/ 8004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem TCP Port\u003c\/td\u003e\n\u003ctd\u003e8005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM1–4 UDP Local Ports\u003c\/td\u003e\n\u003ctd\u003e9001 \/ 9002 \/ 9003 \/ 9004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem UDP Local Port\u003c\/td\u003e\n\u003ctd\u003e9005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM1–4 UDP Remote Ports\u003c\/td\u003e\n\u003ctd\u003e1001 \/ 1002 \/ 1003 \/ 1004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem UDP Remote Port\u003c\/td\u003e\n\u003ctd\u003e1005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain COM Baud Rate\u003c\/td\u003e\n\u003ctd\u003e115200 (8 data bits, 1 stop bit, no parity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eApplication Example\u003c\/h2\u003e\n\u003cimg class=\"img-app-example\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0802\/0410\/3901\/files\/Screenshot_2026-06-08_130137.png?v=1780913004\" alt=\"Application Example\"\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Use straight-through (T568A or T568B) UTP cable for the LAN connection — do not use a crossover cable. Use of a surge protection device is strongly recommended.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"STAISON","offers":[{"title":"Default Title","offer_id":47905732395229,"sku":"ST-NCTL210","price":0.0,"currency_code":"SAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0802\/0410\/3901\/files\/ST_NCTL210_server_front_and_rear.jpg?v=1781959354","url":"https:\/\/www.staison.com\/products\/st-nctl210-network-serial-port-expander","provider":"STAISON","version":"1.0","type":"link"}