4-20 mA Current Output Transmitter &
Totalizer for 0-1 mA, 4-20 mA or 0-10V
Scalable to flow rate or total flow from process signals.
DIN Rail mounted, digitally programmable.

Standard Features solated 4-20 mA or 0-10V transmitter output, selectable Output tracks rate or total 0-1 mA, 4-20 mA or 0-10V process signal input Output accuracy maintained for narrow or wide spans Selectable square root for differential flow Output resolution: 0.0015% of span (16 bits) Output accuracy: ą0.02% of span Output update rate: 25/sec 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 custom curve linearization, time based on rate (1/rate) Low voltage power, 10-48 Vdc or 12-32 Vac

Description

The Laureate 4-20 mA output, process signal input totalizing transmitter accepts 0-1 mA, 4-20 mA or 0-10V signals from flow meters and other transducers, such as watt meters, to track rate or totalized rate.

With a Standard Main Board, the transmitter output can track rate (such as gallons per minute or watts) or totalized rate (such as gallons or kilowatt hours) whether the transducer output is linear or requires square root extraction (differential pressure flow transducers).
With an Extended Main Board, the transmitter can also perform custom curve linearization (provided by a curvilinear spline fit with up to 180 data points), display 1/ rate (such as the time it takes a conveyor to pass through an oven), and perform batch control for repetitive fill operations. Such applications typically make use of optional dual solid state relays, which are available as options. External reset of totals is provided by a special connector.

Signal Conditioner Board for Laureate Analog Input Flow Rate Meter and Analog Flow Totalizer A signal conditioner board converts the full-scale 0-1 mA, 4-20 mA or 0-10 V analog signal to a frequency of 10 kHz to 110 kHz. This frequency is determined by measuring period over a selected gate time (from 10 ms to 200 s) and taking the inverse of period. At the lowest frequency of 10 kHz and the minimum gate time of 10 ms, the transmitter is capable of 25 updates per second. Scaling is done mathematically. Totals are stored in nonvolatile memory in case of power loss.

Three analog transmitter settings are jumper selectable: 4-20 mA, 0-20 mA or 0-10V. All selections provide 16-bit (0.0015%) resolution of output span and 0.02% output accuracy. The output tracks the reading from -99,999 to +99,999 counts that would be transmitted digitally. For process signals, this reading has a rated accuracy of ą0.01% of full scale input and can be scaled in software. Output Isolation from signal and power grounds eliminates potential ground loop problems. The supply can drive 20 mA into a 500 ohm (or lower) load for 10V compliance, or 10V into a 5K ohm (or higher) load for 2 mA compliance.

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 & Totalizer for 0-1 mA, 4-20 mA or 0-10V Signals

Analog Input
0-1 mA 4-20 mA 0-10 V

Input resistance
Max current or voltage
182 ohms
37 mA 9 ohms
160 mA 1 Mohm
600 V

Input Resolution
Span Tempco
Zero Tempco
Accuracy at 25°C
Read Rate

6 digits
ą0.0025% R/°C
ą0.0005 FS/°C
ą0.005% FS ą1 count
25/sec (typical)

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)
10V ( 0-500 ohm load )
2 mA ( 5 kOhm load )
16 bits (65,536 steps)
0.02% of output span
25/sec
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

120 x 101 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.

Pinout
Laureate 4-20 mA Transmitter & Totalizer for 0-1 mA, 4-20 mA or 0-10V Signals

Ordering Guide
Laureate 4-20 mA Transmitter & Totalizer for 0-1 mA, 4-20 mA or 0-10V Signals
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: Rate, square root of rate, or totalized rate from differential pressure flow transducers with a DC output. With Extended Main Board: Above plus linearization of nonlinear inputs, batch operation, 1/rate (time).	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	Voltage-to-Frequency Converter VF1 V-to-F Converter, 4-20 mA VF2 V-to-F Converter, 0-1 mA VF3 V-to-F Converter, 0-10V	NC
Input Type	In the write-in field of your invoice, specify min input, min reading; max input, max reading.	NC
Accessories	CBL04 RS-232 cable, LTA to computer or USB adapter CBL02 USB to RS-232 cable adapter	$19 $39