Tachometers and Installation Devices for Set Point Monitoring, Conversion and Display of Rotational Speed, Speed and Flow Rate

These units receive input signals from speed sensors or flow rate transmitters. Partly equipped with specially designed signal inputs fitting our A5S sensors, partly equipped with universal signal inputs serving any other type of sensor. Thus, the devices can be adjusted to suit every application.

Tachometer product matrix (overview)

Model SIL1 Signal Input Analog Output Alarm Output as SPDT relays Alarm Output as PhotoMOS relays Data Interface
D521.02 1   2   USB 2.0*
D521.04 1   2 2 USB 2.0*
D521.10 1     USB 2.0*
D521.12 1 2   USB 2.0*
D521.14 1 2 2 USB 2.0*

*USB 2.0 only for parameterization


Single Channel Speed Monitor series D521 for increased safety requirements up to SIL1

  • Monitor with sensor monitoring and self-test function with plausibility check
  • 5-digit red LED display
  • Frequency range 0 Hz...50 kHz
  • Universal Signal Input, also for Magnetic Pick-Up sensors (MPUs)
  • 1 Analog Output 0/4…20 mA or 0/2…10 V (for versions D521.10, D521.12, D521.14)
  • 2 Alarm Outputs as SPDT relays (for versions D521.02, D521.04, D521.12, D521.14)
  • 2 Alarm Outputs as PhotoMOS relays (for versions D521.04, D521.14)
  • Square wave Pulse Output
  • USB 2.0 Data Interface
  • Maintenance-free during the lifetime, therefore minimized TCO
  • Two monitors, suitably configured with their Alarm Outputs linked together, may provide a protection system with 1oo2 or 2oo2 redundancy
  • Increased safety with 1oo2 architecture
  • Maximum availability with 2oo2 architecture
  • Universal Power Supply range 20...265 Vuc

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