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Laureate Quadrature Encoder Position & Rate Meter

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Price: $270.00
Item Is In Stock
Configuration: L50000QD
Manufacturer: LAUREL


* denotes required field

Main Board*
Relay Output*
Analog Output*
Serial Communications*
Optional Add-Ons

Laureate Quadrature Encoder Position & Rate Meter
Accurate Position or Rate from Linear & Rotary Quadrature Encoders


-Accepts differential or single-ended 5V logic signals from quadrature encoders
-6-digit scalable display for postion, length or rate
-Quadrature count x1, x2 or x4
-Combined encoder pulse rate to 250 kHz
-Display update rate up to 25/s
-Zero channel input
-Universal 85-264 Vac power, or 10-48 Vdc / 12-32 Vac power
-Transduder excitation output (isolated)
-Wide choice of options:
  -2 or 4 relays, mechanical or solid state (isolated)
  -Analog output (isolated)
  -Serial data I/O: Ethernet, USB, RS485, RS232 (isolated)

Position, Length or Angle Measurement

The Laureate™ quadrature meter with the Standard counter main board accepts the A & B quadrature signals from linear encoders and shaft encoders to provide a highly accurate, scaled display of position, length, or angle in engineering units, such as ft, cm or degrees. The A & B quadrature signals are 90° out of phase, and their phase relationship determines whether up counts (+) or down counts (-) are counted. The meter totalizes the counts and then scales the total in software for display and control. A zero index signal, or Z signal, may be added as a third input to the A & B signals.

Scaled Rate Measurement

Use of the Extended counter main board can convert the quadrature meter from scaled position to scaled rate. For example, it can display the speed of a moving slab in ft/sec. Simultaneous display of position and rate will require two meters. The display and control output update rate for position or rate is normally set to a maximum of 25/s, as determined by a user-programmable gate time.

Quadrature Meter Capabilities

One, two or four transitions may be counted at a maximum combined rate of 250 kHz and be mathematically scaled for display in engineering units from -999,999 to +999,999. The quadrature board has input circuitry which may be jumpered for either single-ended input signals or for balanced line driver signals. Anti-jitter circuitry eliminates errors produced by vibration of the encoder.

A zero index pulse, if available, is interpreted by the meter as indicating a zero reference for an integral number of revolutions of a rotary shaft encoder or the home position of a linear encoder. It is used by the meter for initializing and to correct for any cumulative pulse count errors. Special circuitry corrects for width of the zero index pulse.

In the event of a power failure, the latest total may be stored in non-volatile memory and can be used as the starting point for counting when power resumes. Power fail save or zero index capabilities are alternate meter setup choices.

Additional Capabilities

Optional plug-in boards for communications and control include Ethernet and other serial communication boards, dual or quad relay boards, and an isolated analog output board. Laureates may be powered from 85-264 Vac or optionally from 12-32 Vac or 10-48 Vdc. The display is available with red or green LEDs. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys can be locked out for simplified usage and security. All power and signal connections are via UL / VDE / CSA rated screw clamp plugs.

View the Data/Spec Sheet

View the Manual
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