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LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1

LAUREL

ELECTRONICS, INC.

Laureate™ Dual-Channel Pulse Input Totalizer

With Two Independently Scalable Input Channels & Presets

Features

• Frequencies up to 1 MHz

• Totals stored in non-volatile RAM

• Inputs from NPN or PNP proximity switches, contact closures, digital logic,

magnetic pickups down to 12 mV, or AC inputs up to 250 Vac.

• Up counting from zero to preset value using positive scale factor

• Down counting from preset to zero using negative scale factor

• Universal AC power, 85-264 Vac

• Isolated 5, 10 or 24 Vdc excitation supply to power sensors

• 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

• Optional Extended Counter: all capabilities of Standard counter, plus

- Channel A total and Channel B rate simultaneously

- Up/down counting on Ch A, using Ch B to control count direction

- Counting on Ch A, using Ch B to inhibit counting

- Arithmetic functions A+B, A-B, AxB, A/B, A/B-1 (draw)

Description

The Laureate dual-channel up or down totalizer is a basic

operating mode of the Laureate counter with the FR dual-channel

signal conditioner board. Each channel (A or B) may be indepen-

dently set up and scaled to count up from zero (or other value)

to a preset limit, or to count down from a preset value to zero (or

other limit). Countdown operation is set up by entering a negative

scale factor.

The six-digit counter display is capable of displaying any value

from -999,999 to 999,999 with a programmable decimal point.

Scaling allows direct readout in engineering units, such as gal-

lons or cubic feet based on counts from a turbine flow meter, or

the count of cans based on the count of six-packs. The displayed

channel (A or B) is selected via a front panel pushbutton. The

totals are stored in non-volatile memory so as to be retained in

the absence of power.

Dual or quad AC/DC relays can add on/off control capability tied

to totals A and B.

An optional Extended counter version provides capabilities

beyond those of the Standard counter:

• Rate and total simultaneously. Channel A can display total

while Channel B displays rate. The selection of A or B for

display is via a front panel pushbutton. This mode is ideal for

flow applications.

• Up/down counting. Channel A can serve as an up/down

counter, where the count direction is dynamically changed by

applying a signal to Channel B. For instance, Channel A can

count and scale pulses from a turbine flow meter, while

Channel B inputs the direction of flow. This allows total

volume to be tracked in case of reversible flow.

• Totalizing with external inhibit. Totalizing by Channel A can

be temporarily inhibited by applying a signal to Channel B.

For instance, 60 Hz AC pulses can be counted by Channel A

and be scaled to display elapsed hours. A signal can be

applied to Channel B to start or stop pulse counting when a

process is in operation.

• Custom curve linearization. Exceptionally accurate custom

curve linearization is achievable, for example to linearize the

low end of turbine flow meters. For setup, up to 180 data

points can be input into a spreadsheet or text file by the user.

The computer then calculates spline fit segments, which are

downloaded into the meter via RS-232. The linearized rate

can then be totalized by the Extended counter.

• Arithmetic functions. The Extended counter makes arithme-

tic functions available, namely A+B, A-B, AxB, A/B and A/B-1.

These solve many applications. For instance, A+B allows two

input flows to be summed for total volume, while A-B allows

outflow to be subtracted from inflow for net volume. A/B

allows the mixing of ingredients in a specified ratio. By moni-

toring and alarming the A/B volume ratio, ingredient B can be

added to A until the proper ratio is achieved.

Inputs to the FR dual-channel signal conditioner can be

proximity switches with PNP or NPN output, TTL or CMOS logic,

magnetic pickups, contact closures, low-level outputs from

turbine flow meters down to 12 mV, and high-level AC line inputs

up to 250 Vac. A built-in isolated 5, 10, or 24 Vdc excitation

supply can power proximity switches and other sensors, thus

eliminating the need for an external power supply.

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.

Summary of content (5 pages)

PAGE 1
LAUREL Laureate™ Dual-Channel Pulse Input Totalizer With Two Independently Scalable Input Channels & Presets ELECTRONICS, INC. Features • Frequencies up to 1 MHz • Totals stored in non-volatile RAM • Inputs from NPN or PNP proximity switches, contact closures, digital logic, magnetic pickups down to 12 mV, or AC inputs up to 250 Vac.
PAGE 2
Specifications Display Readout Display Range Zero Adjust Span Adjust Indicators 6 LED digits, 7-segment, 14.2 mm (.56"), red or green. -999999 to +999999, XXXXEX notation beyond 999999 -999999 to +999999 0 to 999999 Four LED lamps Inputs Types Signal Ground Channel A Frequency Channel B Frequency Minimum Signal Maximum Signal Noise Filter Contact Debounce AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups. Common ground for channels A & B 0.005 Hz to 1 MHz 0.
PAGE 3
Serial Data I/O (optional) Board Selections Protocols Data Rates Digital Addresses Isolation Ethernet, Ethernet-to-RS485 server, USB, USB-to-RS485 server, 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.
PAGE 4
Combining Two Totals A+B, A-B and A/B arithmetic functions are available with the Extended counter. A+B sums both totals, while A-B subtracts the outflow total from inflow total. The A/B ratio applied to total helps assure the proper mixing of components. Controller setup and monitoring of the mixing operation are facilitated by optional serial communications. RS-485 allows a single data line to handle multiple controllers.
PAGE 5
Ordering Guide Create a model a model number in this format: L50000FR, IPC Main Board L5 L6 L7 L8 Standard Main Board, Green LEDs Standard Main Board, Red LEDs Extended Main Board, Green LEDs Extended Main Board, Red LEDs The Standard Main Board handles up or down totalizing as well as frequency, rate, period, square root of rate, stopwatch operation, and periodic time interval.