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

Dual-Channel Pulse Input Totalizer & Flow Totalizer by Laurel Electronics

Standard Counter

Product Links

Specs
Mechanical
Serial I/O options
Power options
Relay options
Analog output option
Meter manual
Serial manual
Modbus manual
Setup software
Pricing

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.
Green or red display.
Universal AC power, 85-264 Vac
Isolated 5, 10 or 24 Vdc excitation supply to power sensors.
NEMA 4X, 1/8 DIN case
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 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)

Options:

Low voltage power: 10-48 Vdc or 12-32 Vac
2 or 4 output relays, electromechanical or solid state

1 or 2 isolated analog outputs: 4-20 mA, 0-20 mA, 0-10V, -10 to +10V

Serial communications: RS232, RS485, Modbus RS485, USB, USB-to-RS485 converter

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 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 a 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.

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.

Signal conditioner for Laureate Dual-Channel Up/Down Totalizer

The FR 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. Optional plug-in boards for communications and control include single or dual analog output boards, dual or quad relay boards, and serial communications boards. 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.

Specifications

Display
Readout Color Display Range Zero Adjust Span Adjust Indicators	6 digits, 7-segment, 14.2 mm (0.56") Red or green LED -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 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	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
Excitation Output (standard)
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
Analog Output (optional)
Output Levels Current compliance Voltage compliance Scaling Resolution Isolation	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 kOhm load) 12V at 20 mA ( < 600 Ohm 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)
Relay Outputs (optional)
Relay Types Current Ratings Output common Isolation	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 130 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
Serial Data I/O (optional)
Board Selections Protocols Data Rates Digital Addresses Isolation	RS232, RS485, Modbus RS485, USB, USB-to-RS485 converter 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
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

Typical Applications

Up/Down Totalizing
	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
	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
	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
	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
	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
	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
Click on the radio buttons to build a model number with pricing (shown below the Ordering Guide).