LAUREL
ELECTRONICS, INC.
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 userprogrammable 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
Laureate™ Quadrature Encoder
Position & Rate Meter
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 builtin isolated 5, 10, or 24 Vdc excitation supply can power transducers and eliminate the need for an external power supply.
All power and signal connections are via UL / VDE / CSA rated
screw clamp plugs.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1
Specifications
Display
Readout
Display Range
Zero Adjust
Span Adjust
Indicators
Inputs
Type
Transitions Monitored
Max Pulse Rate
Position Error
Differential high threshold
Differential low threshold
Differential common mode
Single-ended high voltage
Single-ended low voltage
Input Resistance, typ.
Quadrature Position Mode
Zero Adjust
Span Adjust
Quadrature Rate Mode
Conversion Technique
Conversion Time
Gate time
Time Before Zero Output
Output & Display Update
Time Base Accuracy
6 LED digits, 7-segment, 14.2 mm (.56"), red or green LED
-999999 to +999999, XXXXEX notation beyond 999999
-999999 to +999999
0 to 999999
Four LED lamps
Differential or single-ended quadrature
x1, x2 or x4
250 kHz at x1, 125 kHz at x2, 62.5 kHz at x4
No error contributed by meter
+200 mV
-200 mV
± 7V
2.5V to 10V
-1V to +1V
17 kOhm
-999999 to +999999
0 to 999999
Inverse period
Gate time + 30 ms + 0-2 signal periods
Selectable 10 ms to 199.99 s
Selectable 10 ms to 199.99 s
Same as conversion time
Calibrated to ±2 ppm
Power
Voltage, standard
Voltage, optional
Frequency
Power Isolation
Excitation Output (standard)
5 Vdc
10 Vdc
24 Vdc
Output Isolation
Analog Output (optional)
Output Levels
Current compliance
Voltage compliance
Scaling
Resolution
Isolation
Relay Outputs (optional)
Relay Types
Current Ratings
Output common
Isolation
85-264 Vac or 90-300 Vdc (DC operation not UL approved)
12-32 Vac or 10-48 Vdc
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test
5 Vdc ± 5%, 100 mA
10 Vdc ± 5%, 120 mA
24 Vdc ± 5%, 50 mA
50 Vdc to meter ground
4-20 mA, 0-20 mA, 0-10V, -10 to +10V (single-output option)
4-20 mA, 0-20 mA, 0-10V (dual-output option)
2 mA at 10V ( > 5 kΩ load)
12V at 20 mA ( < 600Ω load)
Zero and full scale adjustable from -99999 to +99999
16 bits (0.0015% of full scale)
250V rms working, 2.3 kV rms per 1 min test
(dual analog outputs share the same ground)
2 Form C contact relays or 4 Form A contact relays (NO)
2 or 4 Form A, AC/DC solid state relays (NO)
8A at 250 Vac or 24 Vdc for contact relays
120 mA at 140 Vac or 180 Vdc for solid state relays
Isolated commons for dual relays or each pair of quad relays
250V rms working, 2.3 kV rms per 1 min test
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 2
Serial Data I/O (optional)
Mechanical
Board Selections
Protocols
Data Rates
Digital Addresses
Isolation
Environmental
Operating Temp.
Storage Temp.
Relative Humidity
Protection
Ethernet, Ethernet-to-RS485 converter, USB, USB-to-RS485 converter,
RS485 (dual RJ11), RS485 Modbus (dual RJ45), RS232.
Modbus RTU, Modbus ASCII, Laurel ASCII protocol
300 to 19200 baud
247 (Modbus), 31 (Laurel ASCII),
250V rms working, 2.3 kV rms per 1 min test
0°C to 60°C
-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 3
Application Examples
Using Quadrature for Cutting to Length
Using Quadrature for X-Y Positioning
Controlling the repetitive cutting of material to length is
an excellent application of the Laureate quadrature
meter.
The quadrature encoder shares the shaft of a sensing
wheel, whose rotation corresponds to lineal
displacement of material. The meter compares the
displacement reading against setpoint information, and
then uses its dual relays to first slow down and then cut
the material.
Accurate X-Y position or rate can be obtained from two
shaft encoders, which convert linear position to
quadrature signals as a shaft turns. In addition to serving
as a display, each Laureate can use its optional dual
relay setpoint capability for closed loop control. It can
also transmit data via RS-232, RS-485, or a 4-20 mA
analog signal.
Using Quadrature to Monitor a Drilling Operation
Quadrature can be used to track position and vertical
drilling speed of the bit in an oil drilling operation. A shaft
encoder is rotated by a cable that moves with the drilling
shaft.
In this application, the same encoder signal is applied to
a Laureate quadrature meter for position, and to a
second quadrature meter for rate. Both meters can be
scaled to read out in appropriate engineering units, such
as feet and inches per minute, and can be alarmed. A
Laureate 6-digit remote display could be added to read
out peak rate.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4
Ordering Guide
Create a model a model number in this format: L50000QD, IPC
Main Board L5 Standard Main Board, Green LEDs (for position)
L6 Standard Main Board, Red LEDs (for position)
L7 Extended Main Board, Green LEDs (for position or rate)
L8 Extended Main Board, Red LEDs (for position or rate)
Power 0 Isolated 85-264 Vac
1 Isolated 12-32 Vac or 10-48 Vdc
Relay Output
(isolated)
Analog Output
(isolated)
Digital Interface
(isolated)
Input Type QD Quadrature Signal Conditioner
Add-on Options BL Blank lens without button pads
0 None
1 Two 8A Contact Relays
2 Two 120 mA Solid State Relays
3 Four 8A Contact Relays
4 Four 120 mA Solid State Relays
0 None
1 Single isolated 4-20 mA, 0-20 mA, 0-10 V, -10 to +10V
2 Dual isolated 4-20 mA, 0-20 mA, 0-10V
0 None
1 RS-232
2 RS485 (dual RJ11 connectors)
4 RS485 Modbus (dual RJ45 connectors)
5 USB
6 USB-to-RS485 converter
7 Ethernet
8 Ethernet-to-RS485 converter
CBL01 RJ11-to-DB9 cable
CBL02 USB-to-DB9 adapter
CBL05 USB Cable, A to B
IPC Clear front panel cover sealed to NEMA 4X / IP65
BOX1 NEMA-4X wall-mount enclosure
BOX2 BOX1 plus IPC
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 5
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