Some notes on draw-wire encoders and their new order codes

Lika Electronic offers a complete range of draw-wire encoders

Encoders driven by a draw wire can replace standard encoders in many applications. For example, they can be a good solution when working space is limited or the application is in an extreme environment. This is because the encoder housing can be mounted in a safe place, easily accessible and adequately protected. This while the measuring wire requires minimum space and can be exposed to harsher conditions.

Draft wire encoders can be equipped with a very large selection of interfaces.

• With programmable incremental encoder (SFEM1 & SFEM2)

Resolution down to 0.01 mm / 10 µm (16,384 PPR), universal output circuit HTL/TTL, fully configurable according to needs via free software tool.

• With SSI and analogue absolute encoder (SFAS1, SFAM1, & SFAM2)

Resolution down to 0.012 mm / 12 µm; analogue version with TEACH-IN keys and overrun safety function, current and voltage options.

• With Ethernet and fieldbus absolute encoder (SFAM1 & SFAM2)

Profinet, EtherNet/IP, EtherCAT, POWERLINK, MODBUS TCP, Profibus, CANopen, DeviceNet, MODBUS RTU. This makes Ethernet technology available in the most uncomfortable conditions (the smallest rooms, harsh industrial environments). Resolution down to 0.024 mm / 24 µm, full set of configuration and diagnostic parameters: position and speed readout, full scaling, preset, code sequence, extended diagnostics, Ethernet and bus network settings.

• With potentiometer (SFPS)

Resistance values from 1 to 20 k, current and voltage output.

• With ATEX incremental and absolute encoder (SAK & SBK)

Category 2 ATEX encoder for use in zones 1, 2, 21, 22 and Category 3 ATEX encoder for use in zones 2, 22 with ultra-rugged housing, oversized frame walls and IP65 sealing.

• Special encoder versions

Designed for individual applications such as towing encoders for the shipbuilding industry, marine installations and offshore facilities with stainless steel housings and special surface treatments and seals for saltwater and corrosion protection.

Following the installation of the new ERP software at the beginning of January 2023, the order codes as well as the names of the draw-wire encoders have changed, below follows a round-up of the name changes. Please note that all mechanical and electrical technical characteristics remain unchanged.

“S” in the name (such as in SFES1 or SFAS1) is used to mark the encoders with the shortest measuring wires (up to 2 metres); “M” (such as in SFEM1 or SFAM2) is used to mark the encoders with the longest measuring wires (from 5 metres on). In the “M” order codes with two wire options, the following number “1” marks the shortest wire option; number “2” marks the longest wire option. See for example the SFEM1-05000-... encoder with 5-metre long wire; and the SFEM2-10000-... encoder with 10-metre long wire.

SAK and SBK previous encoder names did not change.