Laurel Electronics for Digital Panel Meters, Counters, Timers, Transmitters, Digital Displays

Digital Panel Meters - Counters - Timers
DIN Rail Transmitters - Large Digit Displays

   

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Laureate™ Dual-Channel Totalizer
With Two Independently Scalable Channels & Presets
  

Laurel Dual-Channel Up/Down Totalizer with two independently scalable channels and presets
CE Mark   UL Mark RoHS Mark

  Standard Counter

  • Independent, scalable totals for Channels A & B.
  • Totals stored in non-volatile memory.
  • 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.
  • Data rates up to 1 MHz.
  • Isolated 5, 10 or 24 Vdc excitation supply to power sensors.
  • Green or red display
  • NEMA 4X, 1/8 DIN case
  • Dual relay option
  • Analog output option
  • Serial communication options
  • Low voltage AC & DC power
  • Certified to UL 61010C-1 (UL mark), EN 61010-1 (CE mark), and RoHS.

Extended Counter

All capabilities of the Standard Counter, plus:
  • Channel A total and Channel B rate simultaneously.
  • Up/down counting on Channel A, using Channel B to control count direction.
  • Counting on Channel A, using Channel B to inhibit counting.
  • Arithmetic functions A+B, A-B, AxB, A/B, A/B-1 (draw).

Description

Laurel 1/8 DIN Totalizer and Counter for Pulse Input Signals

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 independently 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 programmable decimal point. Scaling allows direct readout in engineering units, such as gallons or cubic feet based on counts from a turbine flowmeter, 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.

The minimum recommended complementary option for the Laureate totalizer is the dual setpoint controller output board, which is available with either 8A relays or AC/DC solid state relays.

Extended Counter Capabilities

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 arithmetic 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 monitoring and alarming the A/B volume ratio, ingredient B can be added to A until the proper ratio is achieved.

Universal Signal Conditioner

Signal conditioner for Laureate Dual-Channel Up/Down TotalizerThe dual-channel signal conditioner accepts inputs from 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. Jumper selections provide optimum operation for different sensor types and noise conditions.

A built-in isolated 5, 10, or 24 Vdc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.

Other Features and Options

Plug-in isolated analog output, dual setpoint controller, and RS232/485 serial data I/O boards can upgrade the Laureate totalizer from a stand-alone monitor to system interface and control. The ability of the Laureate totalizer to output an isolated 4-20 mA signal which tracks a total may be unique among totalizers. The 1/8 DIN case of Laureate meters and counters meets NEMA 4X (IP-65) standards from the front for high pressure wash-down when panel mounted.

Specifications

Display
Readout
Color
Display Range
Zero Adjust
Span Adjust
Indicators
6 digits, 7-segment, 14.2 mm (.56")
Red or green LED
-999999 to +999999, XXXXEX scientific 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 Hz to 1 MHz
0 Hz to 250 kHz
Nine ranges from (-12 to +12 mV) to (+1.25 to +2.1V).
250 Vac.
1 MHz, 30 kHz, 250 Hz (selectable)
0, 3, 50 ms (selectable)

Power
Voltage, standard
Voltage, optional
Frequency
Power Isolation
95-240 Vac ±10% or 90-300 Vdc
12-30 Vac or 10-48 Vdc
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test.
Analog Output (optional)
Output levels
Compliance
Scaling
Resolution
Isolation
0-10V, 0-20 mA, 4-20 mA (jumper selectable)
2 mA at 10V (5 kOhm load), 12V at 20 mA (0-60 ohm load)
Zero and full scale adjustable from -99999 to +99999
12 bits (0.025% of full scale)
250V rms working, 2.3 kV rms per 1 min test
Dual Contact Relay Outputs (optional)
Relay Type
Load Rating
Isolation
Form C
8A at 250 Vac or 24 Vdc
250V rms working, 2.3 kV rms per 1 min test
Dual Solid State Relay Outputs (optional)
Relay Type
Load Rating
Isolation
SPST, normally open, Form A
120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance.
250V rms working, 2.3 kV rms per 1 min test
Serial Data I/O (optional)
Board Selections
Protocols
Data Rates
Digital Addresses
Isolation
RS232, RS485, Modbus RS485
Modbus RTU, Modbus ASCII, simpler Laurel ASCII
300 to 19200 bps
247 (Modbus), 31 (Laurel ASCII),
250V rms working, 2.3 kV rms per 1 min test
Excitation Output
5 Vdc
10 Vdc
24 Vdc
Output Isolation
5 Vdc ±5%, 100 mA
10 Vdc ±5%, 120 mA
24 Vdc ±5%, 50 mA
50 Vdc to meter ground
Environmental
Operating Temperature
Storage Temperature
Relative Humidity
Protection
0°C to 60°C
-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted
Signal Connections
condualnobox.gif (1188 bytes)

Typical Applications

Up/Down Totalizing

Dual-channel up/down totalizing using one channel for counts and one channel for count direction

Up/down totalizing is provided by a mode of the Extended counter where pulses are either added or subtracted on Channel A based on a direction input on Channel B. The counter can also be programmed so that counting by Channel A is inhibited by an input on Channel B.

Combining Two Totals

Dual-channel up/down totalizing, where two channels are added or subtracted.

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.

Up or Down Counting with Preset

Two repetitive fill operations handled by a single Laureate dual-channel digital counter and totalizer

A single Laureate dual-channel counter will handle two repetitive fill operations by counting from zero up to a preset, or down from a preset to zero. A dual setpoint relay board is required.

Machine ON Time and Utilization

Dual-channel up/down totalizing to measure machine ON time by counting power line cycles.

An easy way to measure the ON time of machines is to count AC line cycles and scale the total to hours. To display machine utilization or duty cycle in percent, use the Extended counter. Connect Channel A to switched AC and Channel B to the AC line, and have the counter display the A/B ratio with a 100 multiplier.

Total and Rate Simultaneously

Displaying rate and total in the same Laureate digital panel totalizer and rate meter.

The Extended version of the Laureate dual channel counter can display scaled rate or total for the same channel at the push of a button, and alarm both the rate and total. The Extended version can also do curve linearization, thereby extending the working range and accuracy of flow transducers.

System-level Capabilities

System-level capabilities of Laureate dual-channel totalizer.

The Laureate dual channel totalizer can independently scale, display and alarm two totals, and the totals plus alarm data can be transmitted via RS-232 or RS-485. The displayed totals can also be transmitted as an isolated 4-20 mA or 0-10V analog output. The Extended version can further display and transmit arithmetic combinations of the two totals.

Ordering Guide
Laureate™ Dual-Channel Totalizer

Create a model number in this format: L80101FR. This example calls out a Laureate counter with an Extended Main Board with red LEDs, 95-240 Vac ±10% & 90-300 Vdc power, dual 8A contact relays, no second output, RS-232 serial output, and a dual-channel frequency signal conditioner. Includes plug-in screw terminals.
  
Main
Board
L5 Standard Main Board, Green LEDs.
L6  Standard Main Board, Red LEDs.
L7  Extended Main Board, Green LEDs.
L8  Extended Main Board, Red LEDs.
$230
$230
$270
$270
Note: The Standard Main Board handles up or down totalizing as well as frequency, rate, period, square root of rate, and A-to-B time interval. The Extended Main Board handles the above plus simultaneous rate and total, stopwatch, arithmetic functions, phase, batching, and custom curve linearization.  
Power Isolated 95-240 Vac ±10% & 90-300 Vdc
Isolated 12-30 Vac & 10-48 Vdc.
NC
$30
Setpoint
Output
None.
Dual 8A Contact Relays.
Isolated Dual Solid State Relays.
NC
$80
$55
Analog
Output
None.
Isolated 0-20 mA & 0-10 V.
NC
$90
Digital
Interface
None.
Isolated RS-232.
Isolated RS-485.
Isolated Modbus RS-485.
NC
$60
$80
$90
Input
Type
FR  Dual-Channel Pulse Input Signal Conditioner.  NC
Add-on
Options
EB
BL

CBL01
CBL02

IPC
BOX1
BOX2
Extra bight red LED display
Blank lens without button pads
RJ11-to-DB9 cable
USB-to-DB9 adapter
Clear front panel cover sealed to NEMA 4X / IP65
NEMA-4X wall-mount enclosure with 1/8 DIN cutout
NEMA-4X wall-mount enclosure with 1/8 DIN cutout plus IPC
$30
NC
$19
$39
$40
$140
$180 
 
Laurel Electronics domestic orders Order from distributors for shipment to USA or Canada.
Laurel Electronics international orders Order online for international shipment.

 

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Laurel Electronics, Inc.
Industrial Instrumentation & Displays
3183-G Airway Avenue
Costa Mesa, CA 92626, USA
Phone: (714) 434-6131
Fax:
     (714) 434-3766

  
© 1996-2008 Laurel Electronics, Inc.