Headquarters: SIKO GmbH Weihermattenweg 2 79256 Buchenbach Germany Phone+49 7661 394-0

Wire-actuated encoder SG120

robust design with 12 m measurement length

Universally applicable wire-actuated encoder with measuring lengths of max. 12000 mm, robust construction as well as precise and safe wire guidance, geared up for attaching the most diverse types of rotary encoders with a 58 mm standard flange.

Profile SG120:

  • Robust design
  • Easy mounting
  • Measurement lengths up to max. 12000 mm
  • Incremental or absolute encoder
  • Housing made of aluminum and plastic
  • High flexibility thanks to free choice of rotary encoders with 58 mm standard flange
  • Various wire types

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Mechanical data
FeatureTechnical dataAdditional information
Wire designø0.54 mm

steel rope

ø0.87 mm

steel wire, plastic coated

ø1.05 mm

para-line plastic rope

Extension force≥8 N

on the rope

Measured distance/ rope drum revolution200 mm
Acceleration≤23.5 m/s2
Weight~0.7 kg
Electrical data
Rotary encoders suitable for the SG120 are featured in RotoLine catalogue 2. Depending on the output signals the following are suitable for:
  • Analog outputs such as current or voltage: AV58M
  • Incremental outputs: IV5800
  • Absolute outputs: WV58MR, WV36M/SSI, WV36M/CAN

The technical specifications for these devices are given in the respective data sheet.  A number of transmitter versions of various manufacturers can also be used. 
System data
FeatureTechnical dataAdditional information
Repeat accuracy ±0.15 mm

depending on the direction of approach (1st layer)

Measuring range≤12000 mm
Travel speed≤3000 mm/s
Ambient conditions
FeatureTechnical dataAdditional information
Ambient temperature-20 … 80 °C
Protection category

depending on the rotary encoder installed

Wire-actuated encoder SG120
Hint for mounting

When securing the wire it must be ensured that the wire is straight and vertical in relation to the wire outlet.  Recommendation: Only select the starting position after an unwound length of approx. 5 mm. This prevents the wire hitting the end stop when it is rewound. 

SG120 Hint for mounting
symbolic depiction

Extension length/measuring range

SIKO wire-actuated encoders achieve the maximum measuring accuracy when the entire wire length (measuring range) is only wound onto the drum in one layer.  On the SG120 the wire diameter is selected so that when the first drum layer is used, a maximum measuring range of 6000 mm is possible.  The larger diameter of the plastic sheathed steel wire and the Paraleine require more space.  The result is a correspondingly shorter measuring range. 

If a lower measuring accuracy is acceptable, two to three layer winding is also possible, and the possible measuring lengths change accordingly. 

Extension lengths SG1201st layer2nd and 3rd layers
Steel wire 6000 mm 12000 mm
Steel wire, plastic-coated 4000 mm 8000 mm
Paraline 2800 mm 5600 mm

SG120 Extension length/measuring range
dimensions refer to millimeters

Scope of delivery
  • SG120
Ordering table
Feature Order data Specifications Additional information
Measuring range
2900 ... 12000 mm, in steps of 100 mm
Wire design
stainless steel ropemeasuring range ≤ 6100 … 12000 mm
stainless steel rope, plastic-coatedmeasuring range ≤ 4100 … 8000 mm
para-line, non-conducting, signal colormeasuring range ≤ 2900 … 5600 mm
stainless steel rope, flexible rope outlet
stainless steel rope, plastic-coated, flexible rope outlet
natural, anodized
others on request
Ordering key

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Melanie Augustin

Melanie Augustin
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