The Laureate pulse input totalizer transmitter accepts two independently scalable input channels from a wide range of pulse sources, such as NPN or PNP proximity switches, contact closures, digital logic, magnetic pickups down to 12 mV, or AC voltages to 250 Vac. Input pulse rates can be as high as 1 MHz.
With a Standard Main Board, the transmitter output can be scaled to track total (such as gallons) or rate (such as gallons per minute). Square root extraction is standard.
With an Extended Main Board, the transmitter can also:
The dual-channel signal conditioner used for pulse detection accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and other signals from 12 mV to 250 Vac. Jumper selections provide optimum operation for different sensor types and noise conditions. A built-in 5V, 10V or 24V dc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.
Standard features of Laureate LTE transmitters include:
Node discovery and configuration of Laureate Ethernet transmitters are easily achieved with Laurel's Windows based Instrument Setup Software. Additional features are provided by Laurel's Windows based Node Manager Software, such as the ability to send emails or test messages either periodically or in the event of an alarm. Both softwares run on a PC under MS Windows, are at no charge, and can be downloaded from this website.
|AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups
|Common ground for channels A & B.
|Nine ranges from (-12 to +12 mV) to (+1.25 to +2.1V).
|1 MHz, 30 kHz, 250 Hz (selectable).
|0, 3, 50 ms (selectable).
|Analog Output (standard)
|4-20 mA and 0-10 Vdc (selectable)
|Compliance, 4-20 mA
|10V (0-500Ω load)
|2 mA (5 kΩ load)
|16 bits (65,536 steps)
|0.02% of output span
|Output Update Rate
|Programmed gate time + 30 ms + 0-2 signal periods
|250V rms working, 2.3 kV rms per 1 minute test
|Ethernet Data I/O (standard)
|10/100 Base-T Ethernet per IEEE 802.3
|300, 600, 1200, 2400, 4800, 9600, 19200 baud
|250V rms working, 2.3 kV rms per 1 min test
|Modbus over Serial Line Specification V1.0 (2002)
|Dual Relay Output (standard)
|Two solid state relays, SPST, normally open, Form A
|120 mA at 140 Vac or 180 Vdc
|Transducer Excitation Output (standard)
|Jumper Selection 1
|10V @ 60 mA, isolated to 50V from signal ground
|Jumper Selection 2
|5V @ 50 mA, isolated to 50V from signal ground
|Jumper Selection 3
|15V @ 60 mA, non-isolated
|85-264 Vac or 90-300 Vdc
|Low Power Option
|10-48 Vdc or 12-32 Vac
|DC or 47-63 Hz
|250V rms working, 2.3 kV rms per 1 min test
|2.5W typical at 24V, 4.0W with max excitation output
|129 x 104 x 22.5 mm case
|35 mm rail per DIN EN 50022
|Plug-in screw-clamp connectors
|0°C to 55°C
|-40°C to 85°C
|95% at 40°C, non-condensing
|Mount transmitters with ventilation holes at top and bottom. Leave 6 mm (1/4") between transmitters, or force air with a fan.
Laureate Ethernet & 4-20 mA Output Transmitter with Dual Pulse Totalizer Inputs
|Up/down totalizing is provided by a mode of the Extended totalizing transmitter where pulses are either added or subtracted on Channel A based on a direction input on Channel B. The unit 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, A/B and AxB arithmetic functions are available with the Extended totalizing transmitter. A+B can sum two totals, while A-B subtracts the outflow total from inflow total. A/B ratio applied to two totals helps assure the proper mixing of components.
|Up or Down Counting with Preset
|A single Laureate dual-channel totalizing transmitter will handle two repetitive fill operations by counting from zero up to a preset, or down from a preset to zero. The dual relay option 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 totalizing transmitter. Connect Channel A to switched AC and Channel B to the AC line, and apply a 100 multiplier to the A/B ratio.
|Custom Curve Linearization
|The Extended version of the Laureate dual channel totalizing transmitter can transmit 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.