Laurel Electronics Laureate Quadrature Encoder Position & Rate Meter - Manual

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1
LAUREL
ELECTRONICS, INC.
Laureate™ Quadrature Encoder
Position & Rate Meter
Features
• Accepts low-level differential or single-ended 5V logic level outputs from
quadrature encoders
• Quadrature count x1, x2 or x4
• Combined encoder pulse rate to 250 kHz
• Programmable display update rate up to 25/s
• Zero channel input 6-digit red or green LED display
• Universal AC power Input, 85-264 Vac
• Isolated 5, 10 or 24 Vdc excitation output
• NEMA 4X, 1/8 DIN case
• Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter
• Optional relay outputs: dual or quad relays, contact or solid state
• Optional isolated analog output: 4-20 mA, 0-20 mA, 0-10V, -10 to +10V
• Optional low voltage power: 10-48 Vdc or 12-32 Vac
Description
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.
Designed for system use. Optional plug-in boards 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. A built-
in isolated 5, 10, or 24 Vdc excitation supply can power trans-
ducers and eliminate the need for an external power supply.
All power and signal connections are via UL / VDE / CSA rated
screw clamp plugs.