4-20 mA Current Output Transmitter
for DC Voltage or Current Input
DIN Rail mounted, digitally programmable.
Exceptional accuracy at high update rates.

Standard Features 0.2, 2, 20, 200, 300V & 600V voltage ranges 2, 20, 200 mA & 5A current ranges All input ranges selectable & factory calibrated 4-20 mA, 0-20 mA or 0-10V transmitter output, jumper selectable, isolated. Output resolution: 0.0015% of span (16 bits) Output accuracy: ±0.02% of span Output update rate to 60/sec Switching supply for 85-264 Vac Easy setup with PC-based Instrument Setup Software DIN rail mount housing only 22.5 mm wide Detachable screw-clamp connectors 5V, 10V or 24V dc transducer 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 DC transmitter) Options: Extended main board for custom curve linearization & rate from successive readings. Low voltage power, 10-48 Vdc or 12-32 Vac

Description

The Laureate 4-20 mA output, DC input transmitter provides six voltage input ranges and four current input ranges, all factory calibrated and jumper selectable. The 200.00 mV and 2.0000 V ranges provide a high input impedance of 1 Gohm to minimize the load on the voltage signal. A 5.000A range measures the IR drop across a built-in 10 mW current shunt. The transmitters can also easily be scaled in software for use with external shunts.

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 DC signals, this reading has a rated accuracy of ±0.01% 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.

Fast read rate at up to 50 or 60 conversions per second while integrating the signal over a full power line cycle is provided by Concurrent Slope (Pat 5,262,780) analog-to-digital conversion. High read rate is ideal for peak or valley capture and for real-time computer interface and control.

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 for DC Voltage or Current Input

Analog Input

Range
Resolution Input Ohms

DC Voltage

200.00 mV
2.0000 V
20.000 V
200.00 V
600.0 V

10 µV
100 µV
1 mV
10 mV
100 mV

1 Gohm
1 Gohm
10 Mohm
10 Mohm
10 Mohm

DC Current

2.0000 mA
20.000 mA
200.00 mA
5.000 A

0.1 µA
1 µA
10 µA
1 mA

100 ohms
10 ohms
1 ohm
0.01 ohm

Input Resolution
Input Accuracy
Update Rate, Max
Max applied voltage
Over-current protection

16 bits (65,536 steps)
±0.01% of full scale ± 2 counts
50/sec at 50 Hz, 60/sec at 60 Hz
600 Vac for 20, 200 & 600 V ranges, 125 Vac other ranges
25x for 2 mA, 8x for 20 mA, 2.5x for 200 mA, 1x for 5 A

Analog Output (standard)

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

4-20 mA, 0-20 mA, 0-10 Vdc (jumper selectable)
10V ( 0-500 ohm load )
2 mA ( 5 kOhm load or higher)
16 bits (65,536 steps)
0.02% of output span plus conversion accuracy
250V rms working, 2.3 kV rms per 1 minute test
50/sec at 50 Hz power, 60/sec at 60 Hz power

Dual Relay Output (standard)

Relay Type
Load Rating

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

Transducer Excitation Output (standard)

Output Levels
Output Isolation

5V@100 mA, 10V@120 mA, 24V@50 mA (jumper selectable)
50V from signal ground

Serial Communications (standard)

Signal Types
Data Rates
Output Isolation
Serial Protocols
Modbus Modes
Modbus Compliance
Digital Addressing

RS232 or RS485 (half or full duplex)
300, 600, 1200, 2400, 4800, 9600, 19200 baud
250V rms working, 2.3 kV rms per 1 min test
Modbus RTU, Modbus ASCII, Laurel ASCII
RTU or ASCII
Modbus over Serial Line Specification V1.0 (2002)
247 Modbus addresses.
Up to 32 devices on an RS485 line w/o a repeater.

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
Detachable screw-clamp plugs

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 for DC Voltage or Current Input

Ordering Guide
Laureate 4-20 mA Transmitter for DC Voltage or Current Input
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	2 Standard Main Board 4 Extended Main Board	NC $40
Main Board	Note: Extended allows custom curve linearization and rate from successive readings.	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
Signal Input	DC Volts DCV1 ± 200.00 mV DCV2 ± 2.0000 DCV3 ± 20.000 V DCV4 ± 200.00 V DCV5 ± 600.0 V	NC
	DC Amps DCA1 ± 2.0000 mA DCA2 ± 20.000 mA DCA3 ± 200.00 mA DCA4 ± 5.000 A	NC
	Note: The same DC signal conditioner can be user configured for DC Volts or DC Amps, and for process, strain or potentiometer follower signals. It is precalibrated in EEPROM for all DC Volt and DC Amp ranges listed.
Accessories	CBL04 RS-232 cable, LTA to computer or USB adapter CBL02 USB to RS-232 cable adapter	$19 $39