{"product_id":"abb-ltu-785-sm9-3055-061-00-line-transceiver-terminal-units","title":"ABB LTU-785 SM9-3055.061.00 Line Transceiver Terminal Units","description":"\u003cp\u003eThe \u003cstrong\u003eABB LTU-785 SM9-3055.061.00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eLTU-785\u003c\/strong\u003e Line Transceiver Terminal Units, operates as a dedicated hardware component for low-voltage signal conditioning and serial protocol communication within INFI 90 control network interfaces.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eLTU-785\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eSM9-3055.061.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eLine Transceiver Terminal Units\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.03 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e120 x 75 x 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC input voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eRelay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocols\u003c\/td\u003e\n\u003ctd\u003eModbus RTU, IEC 60870-5-103\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHigh-Density I\/O Scaling and Firmware Flash Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe line transceiver module routes serial data streams across Modbus RTU and IEC 60870-5-103 network layers, executing continuous loop transfers without degrading backplane bus communication velocity. Internal signal conditioning paths support high-density I\/O scaling across field termination racks while isolating relay outputs from transient voltage surges. Built-in firmware flash compatibility preserves deterministic protocol execution across wide temperature gradients.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What communication protocols are natively executed by the LTU-785 module?\u003c\/p\u003e\n\u003cp\u003eA: The LTU-785 SM9-3055.061.00 executes serial communication over Modbus RTU and IEC 60870-5-103 protocol stacks.\u003c\/p\u003e\n\u003cp\u003eQ: How is the physical grounding path established for the line transceiver unit?\u003c\/p\u003e\n\u003cp\u003eA: Physical earth grounding is secured mechanically through the metallic retaining hardware when mounted directly to the grounded subrack frame.\u003c\/p\u003e\n\u003cp\u003eQ: Is the LTU-785 module capable of cold-climate operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the unit is rated for continuous operational exposure across ambient temperatures ranging from -40 to +85 deg C.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eIsolate primary 24 VDC power feeds and field control loops prior to installing or removing the LTU-785 unit.\u003c\/li\u003e\n\u003cli\u003eWear an anti-static wrist strap connected to cabinet earth ground before handling the transceiver board.\u003c\/li\u003e\n\u003cli\u003eAlign the 120 x 75 x 35 mm unit into its designated mounting slot and tighten retaining screws to secure mechanical grounding.\u003c\/li\u003e\n\u003cli\u003eWire field relay outputs and serial communication lines using recommended wire gauges, ensuring terminal screws are torqued tightly.\u003c\/li\u003e\n\u003cli\u003eSeparate low-voltage serial bus cabling from 230 VAC\/480 VAC power lines by a minimum distance of 200 mm to prevent electromagnetic interference.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53250296414517,"sku":"LTU-785 SM9-3055.061.00","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/LTU-785SM9-3055.png?v=1785902277","url":"https:\/\/www.5gplc.com\/products\/abb-ltu-785-sm9-3055-061-00-line-transceiver-terminal-units","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}