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Jaquet T401 single-channel tachometer

Jaquet T401.00 · 383Z-05307 · single channel speed transmitter · 0-35 kHz · speed signal to relay, open collector and analog output · suitable for active and passive sensors

Note: The T401 has been declared obsolete and is only available from our latest stock; the SpeedSys T10 offers a functional replacement.

Note: The T411 & T412 (display units) have been declared obsolete and are only available from our latest stock; the SpeedSys T11 (expected Q4 2024) offers a functional replacement.
Jaquet T401.00 is a single Channel Tachometer speed switch which converts absolute speed into an analog signal. This unit will measure from 0-1 Hz all the way up to 35 kHz and gives a 4-20 DCmA output, which can be configured via the included Windows software package. The T401 features a single changeover relay and includes 2 limits (A/B) with programmable hysteresis. The T401's adaptive trigger provides high noise immunity, giving a fast response to over speed conditions.


  • T401.00 = Tachometer Only w/4-20 DCmA Output and 1 Relay
  • Converts absolute speed into an analog signal
  • 10-30 DCV Power Supply
  • Includes 2 limits (A/B) with programmable hysteresis
  • Isolated signal input with automatic trigger level adjustment
  • Built-in isolated sensor supply with sensor monitoring
  • Open collector output of sensor frequency
  • Pluggable terminals
  • Configuration and status via included Windows software
  • Accuracy class 0.05% for limits & 0.5% for analog signals
  • Advantages

  • Fast response to over speed conditions
  • Germanischer Lloyd’s and ABS approval for marine applications
  • Digital display of speed value for model T411
  • 0/4…20 mA or 0/2…10 V analog output with rising or falling characteristics
  • Adaptive trigger provides high noise immunity e.g. with electromagnetic sensors
  • Digital input for direct treatment of frequency signals
  • 2 possible relay configuration sets e.g. for start up bridging, controlled via binary inputs
  • Pluggable terminals
  • Integrated 2 or 3 wire sensor monitoring and system watchdog
  • Downloads

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