4-20 mA Current Output Transmitter
& Dual Pulse Input Totalizer
Rate or total in same transmitter, square root extraction.
DIN Rail mounted, digitally programmable.

Standard Features

Isolated 4-20 mA or 0-10V transmitter outputs, selectable

Two independent, scalable totals for Channels A & B

Pulse input rates to 1 MHz

Inputs from NPN or PNP proximity switches, contact closures, digital logic, magnetic pickups down to 12 mV, or AC inputs up to 250 Vac.

Internal conversion of input to six-digit reading:
- Digital span adjust from 0 to ą999,999
- Digital zero adjust from -999,999 to +999,999

Up counting from zero to preset value using positive scale factor

Down counting from preset to zero using negative scale factor

Output resolution: 0.0015% of span (16 bits)

Output accuracy: ą0.02% of span

DIN rail mount package only 22.5 mm thick

Plug-in screw-clamp connectors

Easy setup with PC-based Instrument Setup Software

5V, 10V or 24V dc sensor excitation output, isolated

Dual solid state relays for alarm or control, isolated

RS232 or RS485 serial communications, isolated

Universal AC power, 85-264 Vac

Priced at only $235 (basic totalizer transmitter)
Options:

Extended Main Board for 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).

Low voltage power, 10-48 Vdc or 12-32 Vac

Description

The Laureate 4-20 mA output, 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 engineering units, for example to transmit totalized flow in gallons from a flow meter output. Square root extraction is standard.
With an Extended Main Board, the transmitter output can track rate or totalized rate (such as gallons) whether the transducer output is linear, requires square root extraction, or requires custom curve linearization. The latter can be provided by a curvilinear spline fit with up to 180 data points. The transmitter can also count up to a preset total or down from a preset total to zero. Such applications typically make use of optional dual solid state relays, which are available as options. External reset of totals is via a special three-position screw terminal connector. The two input channels A & B can also be combined arithmetically to provide an analog transmitter output that tracks A+B (e.g., sum of two flows), A-B (e.g., difference of two flows), AxB (e.g., horsepower as product of force and RPM), A/B (ratio of two flow), or A/B-1 (draw or relative elongation of material between rollers).

Signal conditioner board used with 4-20 mA current transmitter for frequency, rate or period 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 transmitters include:

Analog transmitter output, 16-bit, user scalable and isolated. User selectable 4-20 mA, 0-20 mA or 0-10V levels.
Serial communications, isolated. User selectable RS232 or RS485, half or full duplex, Modbus or Laurel ASCII protocol.
Dual solid state relays for control or alarm, isolated. Rated 120 mA at 130 Vac or 170 Vdc.
Transducer excitation output, isolated. User selectable 5V@100 mA, 10V@120 mA or 24V@50 mA.
Universal AC power supply for 85-264 Vac.

Easy Transmitter programming is via Laurel's Instrument Setup Software, which runs on a PC under MS Windows. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL04).

Specifications
Laureate 4-20 mA Transmitter &

Pulse Input

Types

Signal Ground
Minimum Signal
Maximum Signal
Maximum Frequency
Contact Debounce

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).
250 Vac
1 MHz, 30 kHz, 250 Hz (selectable).
0, 3, 50 ms (selectable).

Analog Output

Output Levels
Compliance, 4-20 mA
Compliance, 0-10V
Output Resolution
Output Accuracy
Output Update Rate
Output Isolation

4-20 mA and 0-10 Vdc (selectable)
12V ( 0-600 Ohm load )
2 mA ( 5 kOhm load )
16 bits (65,536 steps)
0.02% of output span
25/sec max
250V rms working, 2.3 kV rms per 1 minute test

Transducer Excitation Output (standard)

Jumper Selection 1
Jumper Selection 2
Jumper Selection 3

10V @ 60 mA, isolated to 50V from signal ground
5V @ 50 mA, isolated to 50V from signal ground
15V @ 60 mA, non-isolated

Dual Relay Output (optional)

Relay Type
Load Rating

Two solid state relays, SPST, normally open, Form A
130 mA at 140 Vac or 180 Vdc

Power Input

Standard Power
Low Power Option
Power Frequency
Power Isolation
Power Consumption

85-264 Vac or 90-300 Vdc (DC operation not UL approved)
10-48 Vdc or 12-32 Vac
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test
2W typical, 3W with max excitation output

Mechanical

Dimensions
Mounting
Electrical Connections

128 x 103 x 22.5 mm
35 mm rail per DIN EN 50022
Plug-in screw-clamp connectors

Environmental

Operating Temperature
Storage Temperature
Relative Humidity
Cooling Required

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.

Application Examples of Totalizing Meters
Up/Down Totalizing
	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.
Total and Rate Simultaneously
	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.

Pinout
Laureate 4-20 mA Transmitter & Dual Pulse Input Totalizer

transmitter totalizer

Ordering Guide
Laureate 4-20 mA Transmitter & Dual Pulse Input Totalizer
Click on the radio buttons to build a model number with pricing (shown below the Ordering Guide).

Quantity
Transmitter Type	LTA Laureate 4-20 mA Transmitter	$235
Main Board	6 Standard Main Board 8 Extended Main Board	NC $40
Main Board	With Standard Main Board: Scalable to ą999,999 for frequency, rate, square root of rate, up or down total, period, A-to-B time interval. With Extended Main Board: Above, plus rate and total simultaneously, ratio (A/B), draw (A/B-1), other arithmetic functions (AxB, A+B, A-B), phase angle, stopwatch, up/down counting, batching operation, linearization of nonlinear inputs.	NC $40
Power	0 Isolated 85-264 Vac 1 Isolated 12-32 Vac or 10-48 Vdc	NC $30
Relay Output	0 None 2 Isolated Dual Solid State Relays	NC NC
Input Type	FR Dual-Channel Pulse Input Signal Conditioner.	NC
Accessories	CBL04 RS-232 cable, TA to computer or USB adapter CBL02 USB to RS-232 cable adapter	$19 $39