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Brand: Kübler
Kübler Sendix M3661 Analog Multiturn Encoder 4-20 mA 0-10 V
Description
A battery-free analog multiturn encoder in a 36 mm housing
The Kübler Sendix M3661 is a miniature absolute multiturn encoder with an analog output, 36 mm in diameter and 53 mm long. It counts revolutions electronically with Energy Harvesting Technology, so it needs neither a gear nor a battery, and it reports the position as a 4 to 20 mA current or a 0 to 10 V or 0 to 5 V voltage that a standard PLC analog input can read. The hollow-shaft sibling is the Sendix M3681 with a blind hollow shaft of up to 10 mm.
Because the output is analog, no SSI, BiSS or fieldbus master is needed. The measuring range is 16 revolutions as shipped and can be scaled up to 65,536 revolutions through the teach inputs, with an optional limit switch function.
Technical specifications
| Parameter | Specification |
|---|---|
| Type | Sendix M3661, shaft version (order code 8.M3661.xxxx.xxxx) |
| Principle | Absolute multiturn, electronic revolution counter, magnetic sensing, Energy Harvesting |
| Current output | 4 to 20 mA; supply 10 to 30 V DC; resolution 12 bit; output load max. 200 ohm at 10 V, 900 ohm at 24 V, 1200 ohm at 30 V |
| Voltage output | 0 to 10 V (12 bit, supply 15 to 30 V DC) or 0 to 5 V (11 bit, supply 10 to 30 V DC); current output max. 10 mA |
| Current consumption (no load) | Max. 30 mA |
| Measuring range | 16 revolutions factory setting; scalable up to 65,536 revolutions via teach inputs |
| Angular measurement deviation | +/-0.5 degrees; repeat accuracy +/-0.2 degrees at 25 C |
| Temperature coefficient | Below 100 ppm/K |
| Update rate / setting time | 1 ms update rate; setting time below 1 ms; power-on time below 1 s |
| Maximum speed | IP65: 6000 min-1, 3000 min-1 continuous; IP67: 4000 min-1, 2000 min-1 continuous |
| Starting torque (20 C) | IP65 below 0.007 Nm; IP67 below 0.01 Nm |
| Shaft load | Radial 40 N, axial 20 N |
| Protection (EN 60529) | IP65 or IP67 |
| Working temperature | -40 to +85 C |
| Shock / vibration | 2500 m/s2, 6 ms; 300 m/s2, 10 to 2000 Hz |
| Materials | Shaft stainless steel; flange aluminum; housing zinc die-cast; cable PVC |
| Weight | Approx. 210 g |
| Approvals as printed | E1 (ECE guideline), UL (file E224618), CE (EMC 2014/30/EU, RoHS 2011/65/EU), ATEX 2014/34/EU for Ex 2/22 variants |
Order code 8.M3661 explained
The type key is 8.M3661.a b c d.e f 1 2. Current and voltage versions are different electrical types, so choose the output first.
| Position | Options |
|---|---|
| a Flange | 1 clamping IP67 / 3 clamping IP65 (36 mm); 2 synchro IP67 / 4 synchro IP65 (36 mm) |
| b Shaft | 1 = 6 x 12.5 mm; 3 = 8 x 15 mm; 5 = 10 x 20 mm; 2 = 1/4 inch x 12.5 mm, all with flat |
| c Output circuit | 3 = current output; 4 = voltage output |
| d Connection | 1/A axial cable, 2/B radial cable, 3 axial M12 5-pin, 4 radial M12 5-pin, C/D M12 with changed terminal assignment |
| e Interface | 3 = 4 to 20 mA, 12 bit, 10-30 V; 4 = 0 to 10 V, 12 bit, 15-30 V; 5 = 0 to 5 V, 11 bit, 10-30 V |
| f Measuring range | 1 = 16 revolutions cw; 2 = 16 revolutions ccw; 3 to 6 = scalable up to 65,536 revolutions, with or without limit switch function, cw or ccw |
Selection notes
The M3661 is a practical fit when a PLC has only analog inputs and the position must be read over several turns, for example on valve or gate actuators, adjustable guides or winding axes. Check that the burden of the analog input is within the output load limits at the supply voltage used, and decide in advance whether the teach inputs will be used for scaling in the field. Supply voltage and output signal are not galvanically isolated, as a datasheet footnote states.
Browse other encoders or the digital multiturn
. Please confirm the order code, supply voltage and range before ordering.Documents and quotation
The attached datasheet (07/2024 edition) covers the M3661 and M3681 with order codes, technical data, teach function description, terminal assignment and dimension drawings. Send the output type, supply voltage, shaft, flange, connection, revolution range and cable length when requesting a quotation.
Datasheets & Documents
- Datasheet Kübler Sendix M3661 / M3681 analog multiturn encoder datasheet (EN, 07/2024) Download
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About brand
Kübler is a German family-owned maker of encoders, slip rings and counting and process displays, founded in 1960 by Fritz Kübler in Villingen-Schwenningen, Black Forest. The company started in the family home as Fritz Kübler Feingerätebau, and its first product was a chronometer with a permanent time display. Kübler is now run by the second generation, Gebhard and Lothar Kübler, and has production sites in Europe, Asia and the USA.
Seven Star LLC is an independent supplier in Muscat. We list Kübler encoders for motion and position feedback in Oman and the GCC.
Kübler company profile
| Founded | 1960, Villingen-Schwenningen, Germany, by Fritz Kübler |
|---|---|
| Headquarters | Villingen-Schwenningen |
| Ownership | Family-owned; managed by Gebhard and Lothar Kübler |
| First product | A chronometer with a permanent time display |
| Product families | Sendix incremental and absolute encoders, functional safety encoders, bearingless and heavy-duty encoders, slip rings, Limes linear measuring systems, Codix counters and process displays |
Milestones
- 1960: Fritz Kübler founds the company in his family home.
- 1997: Fritz Kübler retires from active business life.
- 2020: Kübler marks 60 years.
Kübler product series
Incremental encoders include the Sendix 5000 shaft encoder and the Sendix 5020 hollow shaft encoder, plus the Sendix 7000 and 7020 ATEX and IECEx encoders for Zone 1.
Absolute encoders include the Sendix 5853 singleturn and 5863 multiturn encoders with SSI or BiSS and the 5883 hollow shaft multiturn encoder, and the Sendix M3661 gives a 4-20 mA or 0-10 V analog multiturn output.
Incremental encoders give pulses for speed and relative position, while absolute encoders keep the position after power loss; multiturn types also count revolutions. Hollow shaft encoders mount directly on the motor shaft, and Sendix 7000 and 7020 encoders are for hazardous areas.
Where Kübler encoders are used
Motor speed feedback, cranes and hoists, conveyors, packaging and printing machines, wind turbines and positioning in hazardous areas.
Kübler products we list
Ordering Kübler encoders: what we need
Send the full order code, or the resolution, interface, shaft or hollow shaft size, flange, supply voltage and connection type.
Facts checked against Kübler's own company pages and 60th anniversary article (kuebler.com), October 2026.
Browse Kübler products by category: Encoders.
FAQ
Questions about the Kübler Sendix M3661 Analog Multiturn Encoder 4-20
Answers from our engineering team on installation, compatibility and integration.
01Does the M3661 need a battery?
No. Energy Harvesting Technology counts the revolutions without gear and without battery.
02Which analog outputs are available?
4 to 20 mA, 0 to 10 V and 0 to 5 V, selected through the order code.
03How many revolutions can it measure?
16 revolutions as shipped, scalable up to 65,536 revolutions with the teach inputs.
04What size is the housing?
The encoder is 36 mm in diameter and 53 mm long, as described by Kübler.
05What is the hollow-shaft version?
The Sendix M3681 has a blind hollow shaft of up to 10 mm.
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