When one or two channels are not enough, Istec SpeedSys T30 reads three, on three power inputs, with software voting up to 3oo3 and cross-coupled inputs. It is, together with T20, the functional replacement for the discontinued Jaquet T501 and T601. OEM NORDIC supplies it.
See T30 vote between three channels
Three speed sensor channels in one module: watch software voting single out a deviating channel. Values are illustrative. Press play or jump to a chapter.

- Three channels, three inputs. Independent channels and independent power.
- Majority logic. Software voting up to 3oo3, cross-coupled inputs.
- DIN-rail unit. 67.5 mm wide.
- 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
Which Jaquet tachometers does T30 replace?
T501 and T601, together with T20. Istec developed both as functional replacements with minimal modification. Send us the Jaquet type and we confirm the match.
What does voting do?
T30 compares its three channels in software. Voting goes up to 3oo3, and the inputs can be cross-coupled.
How do I buy T30?
One unit can be ordered in the webshop. For several units ask for a quotation: quoted prices are available for multiple units.
Is T30 SIL rated?
No SIL claim is made for T30. Certified overspeed protection is SpeedSys 200.
Also in this series: All SpeedSys models · T10 explainer · T20 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.