{"title":"Multi-channel weight transmitters for load cells","description":"\u003cp\u003eMulti-channel weighing transmitters for load cells read each load cell individually instead of as a sum signal. This allows you to see which cell is drifting or has failed, digitally adjust the corner load, and evaluate several separate weighing points with one device.\u003c\/p\u003e\n\u003ch2\u003eMulti-channel weighing transmitters for load cells: The difference in operation\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eWith a summing box, individual cells disappear behind a common signal. As long as everything works, this is not a problem. If a cell fails or slowly drifts, the transmitter only shows that the total weight is no longer correct, but not why. Troubleshooting then means: opening the terminal box, disconnecting individual cells, measuring them, often on a filled silo.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA multi-channel device evaluates each input separately and outputs the values individually. The defective channel is thus identified in seconds. Anyone who records the zero points of the channels over time will recognize a damaged or moisture-damaged cell before the scale runs out of tolerance. This is the real reason why multi-channel measurement is used in systems with high availability requirements.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eCorner load adjustment without a screwdriver\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eWith \u003ca href=\"\/en\/collections\/waegetransmitter-1-kanal\"\u003esingle-channel devices\u003c\/a\u003e, corner load adjustment is done mechanically in the summing box via trim potentiometers. This is fiddly, must be done on site, and must be repeated after each cell change.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eIn multi-channel systems, each channel is scaled individually. The adjustment is made in the parametrization, is documented, and can be restored in a few minutes after a cell change, without opening the control cabinet. For platform and floor scales with changing support points, this alone often justifies the extra cost.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eMaking load distribution visible\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eFor silos and containers, the individual values provide information that is not contained in the sum signal. You can see whether the load is unevenly distributed on the support points, whether bulk material accumulates on one side or forms a bridge, and whether a support point is running into overload, even though the total weight is unremarkable. In outdoor installations, wind loads and inclinations can also be assessed.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eFor the design of the support points and the appropriate mounting kit, please refer to the \u003ca href=\"\/en\/collections\/waegemodule\"\u003eweighing modules\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eSeveral weighing points with one device\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe second application has nothing to do with individual cells: several independent scales in one system, such as four dosing containers or several roller conveyor sections. Instead of four transmitters with four bus addresses and four DIN rail slots, one device is sufficient. This saves space in the control cabinet, wiring effort, and configuration work in the control system.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eCheck whether the channels in the desired device can be freely assigned, i.e., output individually and summed in groups. Not every multi-channel device can do both.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eWhat you should consider\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eMore channels mean more cables. Each cell goes individually to the control cabinet, which means longer cable runs and more terminals for large silos than a summing box near the container. Extensions should be implemented in 6-wire technology.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eAlso pay attention to the sampling rate: Some devices measure the channels sequentially, which divides the effective rate per channel. This is irrelevant for slow container weighing, but for dynamic measurements or dosing with short post-correction, you should check the rate per channel. Basics on sampling rate, filters, and interfaces can be found in the overview of \u003ca href=\"\/en\/collections\/waegetransmitter\"\u003eweighing transmitters\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eMatching components\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eYou can find the sensors under \u003ca href=\"\/en\/collections\/waegezellen-kraftaufnehmer\"\u003eload cells and force transducers\u003c\/a\u003e, displays for the operator under \u003ca href=\"\/en\/collections\/waegeindikatoren\"\u003eweighing indicators\u003c\/a\u003e, and the rest of the program in the \u003ca href=\"\/en\/collections\/messelektronik\"\u003emeasurement electronics\u003c\/a\u003e. For cells, we calibrate \u003ca href=\"\/en\/pages\/kalibrierung-waegezelle-kraftmessdose-kraftaufnehmer-iso17025\"\u003eaccording to ISO 17025\u003c\/a\u003e in our own laboratory.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003ePrice, data sheet, and CAD model are available online for each item. Our engineers will advise you directly on the design of the number of channels and wiring.\u003c\/p\u003e","products":[{"product_id":"etlh-waegetransmitter","title":"ETLH weight transmitter","description":"\u003cp\u003e\u003cstrong\u003eWeight transmitter L-TLB4\u003c\/strong\u003e with 6-digit red LED display (8 mm digit height). Compact design with space-saving, slim construction. 4 buttons for system calibration. 6 display LEDs. Dimensions: 26 x 115 x 120 mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4 independent readout channels for load cells\u003c\/strong\u003e (monitoring of individual load cells, total weight display, digital equalization).\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFeatures of the L-TLB4 weight transmitter\u003cbr\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e✅16 bit analog output: 0\/4-20 mA; 0-5\/10V; ±5\/10V\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✅Interface RS485 (Modbus RTU\/ protocol ASCII). \u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e✅2 digital inputs, 3 relay outputs\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e✅OIML R76:2006 certified, class III, 10000 counts 0.2μV\/VSI\u003c\/p\u003e\n\u003cp\u003e✅Installation on the rear wall or panel front on Omega\/DIN rail\u003c\/p\u003e\n\u003cp\u003e✅A\/D converter 24 bit 4 channels (16000000 digits) 4.8 kHz\u003c\/p\u003e\n\u003cp\u003e✅Counter steps 999999\u003c\/p\u003e\n\u003cp\u003e✅Fieldbuses: \u003cstrong\u003eRS485, CANopen, CC-Link, PROFIBUS, PROFINET, Ethernet\/IP, ETHERCAT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e✅The analog output enables the output of:\u003cbr\u003e Current signal: 0...20 mA; 4...20 mA (up to 300 Ohm)\u003cbr\u003e Voltage signal: 0...10 V; 0...5V; ±10V; ±5 V (min 10k Ohm)\u003c\/p\u003e\n\u003cp\u003e\u0026nbsp;\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca title=\"octogon Shop\" style=\"color: #d84f1b;\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/L-TLB4_Datenblatt.pdf?v=1711463052\" target=\"_blank\"\u003eDatasheet\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCAD model:\u003cbr\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/TLB4.stp?v=1712652135\" style=\"color: #d84f1b;\" title=\"octogon Shop\" target=\"_blank\"\u003eL-TLB4\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"octogon Shop","offers":[{"title":"4...20mA; 0...10V; ±10V","offer_id":49294290190662,"sku":"","price":253.0,"currency_code":"EUR","in_stock":true},{"title":"Profinet","offer_id":49294290223430,"sku":"","price":484.0,"currency_code":"EUR","in_stock":true},{"title":"EtherCAT","offer_id":49294290256198,"sku":"","price":484.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/waegetransmitter_L-TLB4.png?v=1735811016"},{"product_id":"etlb-intelligenter-anschlusskasten","title":"ETLB smart junction box","description":"\u003cp\u003eThe \u003cstrong\u003eETLB\u003c\/strong\u003e is an intelligent junction box with \u003cstrong\u003e8 independent channels\u003c\/strong\u003e for load cells, type \u003cstrong\u003eCLM8\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt is designed for weighing systems where each connected load cell is to be monitored individually, for example, in the direct control of a weighbridge.\u003c\/p\u003e\n\u003cp\u003eThe A\/D converter operates with \u003cstrong\u003e8 channels\u003c\/strong\u003e, \u003cstrong\u003e24 bits\u003c\/strong\u003e, and \u003cstrong\u003e16,000,000 digits\u003c\/strong\u003e at \u003cstrong\u003e4.8 kHz\u003c\/strong\u003e, providing \u003cstrong\u003e600 conversions per second\u003c\/strong\u003e. \u003cstrong\u003eUp to 16 load cells with 350 Ω\u003c\/strong\u003e can be connected in 4- or 6-wire technology; the measuring range is \u003cstrong\u003e±39 mV\u003c\/strong\u003e with a sensitivity of \u003cstrong\u003e±7 mV\/V\u003c\/strong\u003e. Linearity is \u003cstrong\u003e\u0026lt; 0.01% full scale\u003c\/strong\u003e, and thermal drift is \u003cstrong\u003e\u0026lt; 0.0005% full scale\/°C\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe functional scope includes digital equalization of the 8 channels, load distribution analysis, and diagnosis for each load cell; an external inclinometer compensates for the inclination of the weighing system up to \u003cstrong\u003e±10 degrees\u003c\/strong\u003e. The device is operated via a backlit alphanumeric LCD with 2 lines of 8 characters (\u003cstrong\u003e5 mm\u003c\/strong\u003e digit height) and a 4-button keypad. Communication takes place via \u003cstrong\u003eRS485 and RS232\u003c\/strong\u003e with \u003cstrong\u003eModBus RTU\u003c\/strong\u003e, ASCII, or continuous transmission. Power supply is from \u003cstrong\u003e12 to 24 V DC\u003c\/strong\u003e at \u003cstrong\u003e5 W\u003c\/strong\u003e; the operating temperature range is from \u003cstrong\u003e-20 °C to +60 °C\u003c\/strong\u003e. Versions are available for Omega\/DIN rail, as a pure circuit board, and \u003cstrong\u003eIP67\u003c\/strong\u003e enclosures made of polycarbonate, ABS, or \u003cstrong\u003eAISI 304\u003c\/strong\u003e stainless steel. Certified according to \u003cstrong\u003eOIML R76:2006\u003c\/strong\u003e, Class III, with 3 x 10,000 verification intervals; UL-recognized component for USA and Canada.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e8 independent load cell channels with individual monitoring\u003c\/li\u003e\n\n\u003cli\u003eDigital equalization, load distribution analysis, and automatic diagnosis\u003c\/li\u003e\n\n\u003cli\u003e24-bit A\/D converter, 16,000,000 digits, 600 conversions per second\u003c\/li\u003e\n\n\u003cli\u003eUp to 16 load cells with 350 Ω\u003c\/li\u003e\n\n\u003cli\u003eRS485 and RS232 with ModBus RTU, Ethernet TCP\/IP on request\u003c\/li\u003e\n\n\u003cli\u003eInclination compensation up to ±10 degrees via inclinometer\u003c\/li\u003e\n\n\u003cli\u003eIP67 enclosure made of polycarbonate, ABS, or AISI 304 stainless steel\u003c\/li\u003e\n\n\u003cli\u003eOIML R76:2006, Class III, 3 x 10,000 verification intervals\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":56812564873542,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/ETLB_CLM8_titelbild.png?v=1788184596"},{"product_id":"etld-digitaler-transmitter-und-lastbegrenzer","title":"ETLD digital transmitter and load limiter","description":"\u003cp\u003eThe \u003cstrong\u003eETLD\u003c\/strong\u003e is a digital transmitter and load limiter for lifting systems, type \u003cstrong\u003eL-LCD3\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt detects load limitation by triggering alarm and pre-alarm thresholds and covers systems with up to 4 weighing points by combining several units.\u003c\/p\u003e\n\u003cp\u003eInstallation is on the rear panel of the control cabinet on Omega\/DIN rail or in a box; dimensions are \u003cstrong\u003e140 x 93 x 65 mm\u003c\/strong\u003e including the terminal block. Setup and calibration are done via a 4-button keypad and an LCD display with 2 lines of 16 characters (\u003cstrong\u003e5 mm\u003c\/strong\u003e digit height). LED indicators show the status of the relay outputs, and a faulty load cell connection is reported.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUp to 8 load cells with 350 Ω\u003c\/strong\u003e can be connected with a supply of \u003cstrong\u003e4 V DC\u003c\/strong\u003e. The A\/D converter operates at \u003cstrong\u003e24 bit\u003c\/strong\u003e and \u003cstrong\u003e3 conversions per second\u003c\/strong\u003e, the measuring range is \u003cstrong\u003e±3.9 mV\u003c\/strong\u003e, linearity is \u003cstrong\u003e\u0026lt; 0.01 % full scale\u003c\/strong\u003e, and thermal drift is \u003cstrong\u003e\u0026lt; 0.002 % full scale\/°C\u003c\/strong\u003e. Power supply is \u003cstrong\u003e24 to 48 V DC\/VAC\u003c\/strong\u003e at \u003cstrong\u003e6 VA\u003c\/strong\u003e, and the operating temperature range is \u003cstrong\u003e-10 °C to +50 °C\u003c\/strong\u003e. \u003cstrong\u003eRS485 and RS232\u003c\/strong\u003e with ASCII protocol, as well as 2 digital inputs, are available for communication. The \u003cstrong\u003eL-LCD3\u003c\/strong\u003e version has \u003cstrong\u003e3 relay outputs\u003c\/strong\u003e and one load cell input; an integrated RF interface for combining multiple units is available on request. The \u003cstrong\u003eL-LCD3PL\u003c\/strong\u003e variant offers \u003cstrong\u003e2 independent load cell inputs\u003c\/strong\u003e and \u003cstrong\u003e4 relay outputs\u003c\/strong\u003e with guided safety contact and meets Category 2 according to \u003cstrong\u003eEN 13849-1:2008, PL d\u003c\/strong\u003e (equivalent to SIL 2 according to EN 62061).\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eDigital transmitter and load limiter for lifting systems\u003c\/li\u003e\n\n\u003cli\u003eLoad limitation via alarm and pre-alarm thresholds\u003c\/li\u003e\n\n\u003cli\u003eSystems with up to 4 weighing points by combining multiple units\u003c\/li\u003e\n\n\u003cli\u003eUp to 8 load cells with 350 Ω, measuring range ±3.9 mV\u003c\/li\u003e\n\n\u003cli\u003eInstallation on Omega\/DIN rail, 140 x 93 x 65 mm\u003c\/li\u003e\n\n\u003cli\u003eRS485 and RS232 with ASCII protocol, RF interface on request\u003c\/li\u003e\n\n\u003cli\u003eL-LCD3PL variant with dual load cell input, Category 2 according to EN 13849-1:2008, PL d\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":56812564906310,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/ETLD_L-LCD3PL_titelbild.png?v=1788184595"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/collections\/ETLG_TLB__product_freigestellt_0c517205-a973-481a-a220-d557f8e054ea.png?v=1788943716","url":"https:\/\/octogon.org\/en\/collections\/multi-channel-weight-transmitters.oembed","provider":"octogon GmbH","version":"1.0","type":"link"}