Laurel Electronics Laureate Dual-Channel Pulse Input Totalizer - 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™ 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.