Need more than a single channel when replacing a Jaquet T501 or T601? Istec SpeedSys T20 reads two sensor channels on redundant power and adds standstill, creep, acceleration and reverse-rotation monitoring. OEM NORDIC supplies it.
See how T20 compares two channels
Two speed sensor channels, one module: watch the channel comparison, the relay trip and the outputs in 3D. Values are illustrative. Press play or jump to a chapter.
- Two channels, two supplies. Independent channels, redundant power.
- Watches more than speed. Acceleration, standstill, creep, reverse rotation and the channels themselves.
- Software voting. 1oo2 and 2oo2.
- Jaquet successor. T501 and T601 (T20 or T30).
Find the right replacement
Tell us the Jaquet type and how many units you need. We name the right SpeedSys. One unit goes straight into the webshop; for several units we quote a price.
Questions we hear most
Is T20 the right replacement for my Jaquet T501 or T601?
Istec developed T20 and T30 as the functional replacements for both, with minimal modification. Send us the Jaquet type and we tell you which one fits.
Why two channels?
Two independent sensor channels let T20 compare them dynamically and vote in software, 1oo2 or 2oo2. It also covers acceleration, standstill, creep and reverse rotation.
What power does it need?
T20 has redundant power supplies and runs on 24 VDC.
Does T20 carry a SIL rating?
No SIL claim is made for T20. Certified overspeed protection is SpeedSys 200.
Also in this series: All SpeedSys models · T10 explainer · T30 explainer.
Sources: Istec SpeedSys datasheet v1.20, Istec’s functional-replacement letter for the Jaquet T4xx/T5xx/T6xx range and Istec’s life-cycle statement of 26 April 2024. Jaquet is a trademark of its owner TE Connectivity. SpeedSys is developed and manufactured by Istec; supplied by OEM NORDIC, a business name of MK-Controls Oy.