Underspeed or Pulse Continuity Relay

In stock (1 item available)
  • Weight
    0.14 kg
  • SKU
    NTR-201

Din rail mounted under-speed relay suitable for all kinds of machinery to detect loss of speed and pulse continuity. It accepts NAMUR proximity switch, PNP sensor or clean contact input signals. Period between pulses adjustable 0.5 second to 21 mins

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Din rail mounted under-speed relays suitable for all kinds of machinery to detect loss of speed and pulse continuity. These units are useful when an output contact is required to alarm on jamming, loss of speed due to blunt cutting tools or as a "stationary" contact to allow the release of machine guards.

The operation is "time based", an input will reset the time delay, if an input is not seen within the set time the output relay will de-energise but not latch. Period between pulses adjustable 0.5 second to 21 mins

Therefore the unit will re-energise if a new leading edge of an input is seen. Removal of the coil voltage, failure of the sensor, or a breakage in the cable between the unit and the PLC or sensor will also cause the output relay to de-energise if in an energised state. Hence the underspeed monitor is fail safe.

  • Power Supply: 24 VDC
  • Max Power Consumption: 11 VA
  • Repeat accuracy: ±0.5% at constant ambient, ±3% across temperature range
  • Reset time:100 ms on make
  • Inhibit time on switch on: 7 to 8 s
  • Input signal: NAMUR proximity switch, PNP sensor (max 20 mA)
  • Normally open contact (8 VDC @8 mA)
  • Max operating speed: 300 Hz (18,000 RPM)
  • Min impulse:1 ms
  • Min time between impulses:1 ms
  • Timing:0.5 second to 21 mins
  • Output contacts: SPCO 10Amps/250V AC1
  • Mechanical life:30 Million ops
  • Electrical life:200K ops at max rated load
  • Operating temperature: -10 °C to+60 °C
  • Storage temperature: -10 °C to+60 °C
  • CE marked: Yes
  • In accordance with: EN61000-6-1: 2007, EN61000-6-3: 2007, EN61010-1: 2002
  • Housing material: Thermo plastic ABS (DIN7728) Extinguishable
  • Constant ambient: ±0.5% of set value
  • Cross temp range: ±3%
  • Setting accuracy: 0 to +30%
  • Response time: Better than 100 ms
  • Manufacturer's Part: YWRVL4 M/24VDC

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
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