4-20 mA & RS485 Output Transmitter for DC Voltage or Current Input

Laureate DC input transmitters 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 GΩ to minimize the load on the voltage signal. A 5.000A range measures the IR drop across a built-in 10 mΩ current shunt. The transmitters can be scaled in software for use with external shunts.

Fast read rate at up to 50 or 60 conversions per second while integrating the signal over a full power line cycle is ideal for peak or valley capture and for real-time computer interface and control.

Digital signal filtering modes are selectable for stable readings in electrically noisy environments.

An unfiltered selection provides true peak and valley readings and aids in control applications.
A batch average filter selection averages each 16 conversions for an update every 1/4 sec.
An adaptive moving average filter selection provides a choice of 8 time constants from 80 ms to 9.6 s. When a significant change in signal level occurs, the filter adapts by briefly switching to the shortest time to follow the change, then reverts back to its selected time constant. An Auto setting selects the time constant selection based on signal noise.

Standard features of Laureate LT transmitters include:

Serial communications output, RS232 or RS485 (half or full duplex), jumper selectable. Three protocols are user selectable: Modbus RTU, Modbus ASCII, or Laurel ASCII. Modbus operation is fully compliant with Modbus Over Serial Line Specification V1.0 (2002). The Laurel ASCII protocol is simpler than the Modbus protocol and is recommended when all devices are Laureates.
Dual solid state relays, isolated, for alarm or control. 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 85-264 Vac power. Low-voltage 10-48 Vdc or 12-32 Vac power is optional.

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).

Analog Input	Range	Resolution	Accuracy	Input Ohms
DC Voltage	±200.00 mV	10 µV	0.01% FS ± 2 cts	1 GΩ
	±2.0000 V	100 µV	0.01% FS ± 2 cts	1 GΩ
	±20.000 V	1 mV	0.01% FS ± 2 cts	10 MΩ
	±200.00 V	10 mV	0.01% FS ± 2 cts	10 MΩ
	±600.0 V*	100 mV	± 0.4 V	10 MΩ
DC Current	±2.0000 mA	0.1 µA	0.01% FS ± 2 cts	100 Ω
	±20.000 mA	1 µA	0.01% FS ± 2 cts	10 Ω
	±200.00 mA	10 µA	0.01% FS ± 2 cts	1 Ω
	±5.000 A	1 mA	±10 mA	0.01 Ω
* Range ETL certified to ±300.0 V
Input Resolution	16 bits (65,536 steps)
Update Rate, Max	50/sec at 50 Hz, 60/sec at 60 Hz
Max applied voltage	600 Vac for 20, 200 & 600 V ranges, 125 Vac other ranges
Over-current protection	25x for 2 mA, 8x for 20 mA, 2.5x for 200 mA, 1x for 5 A
Analog Output (standard)
Output Levels	4-20 mA, 0-20 mA, 0-10 Vdc, -10 to +10Vdc (user selectable)
Compliance, 4-20 mA	10V (0-500Ω load)
Compliance, 0-10V	2 mA (5 kΩ load)
Output Resolution	16 bits (65,536 steps)
Output Accuracy	0.02% of output span plus conversion accuracy
Output Isolation	250V rms working, 2.3 kV rms per 1 minute test
Serial Data Output (standard)
Signal Types	RS232 or RS485 (half or full duplex), jumper selectable
Data Rates	300, 600, 1200, 2400, 4800, 9600, 19200 baud
Output Isolation	250V rms working, 2.3 kV rms per 1 min test
Serial Protocols	Modbus RTU, Modbus ASCII, Custom ASCII
Modbus Compliance	Modbus over Serial Line Specification V1.0 (2002)
RS232/485 Connector	Screw terminals for easy daisy chaining
Digital Addresses	247 for Modbus, 31 for Custom ASCII
Dual Relay Output (standard)
Relay Type	Two solid state relays, SPST, normally open, Form A
Load Rating	120 mA at 140 Vac or 180 Vdc
Transducer Excitation Output (standard)
Output Levels	5V@100 mA, 10V@120 mA, 24V@50 mA (jumper selectable)
Output Isolation	50V from signal ground
Power Input
Standard Power	85-264 Vac or 90-300 Vdc
Low Power Option	10-48 Vdc or 12-32 Vac
Power Frequency	DC or 47-63 Hz
Power Isolation	250V rms working, 2.3 kV rms per 1 min test
Power Consumption at 24V	1.5W typical, 3W with max excitation output
Mechanical
Dimensions	129 x 104 x 22.5 mm case
Mounting	35 mm rail per DIN EN 50022
Connectors	Detachable screw-clamp connectors for signal and power RJ45 jack for Ethernet
Environmental
Operating Temperature	0°C to 55°C standard, -40°C to 70°C with -X option
Storage Temperature	-40°C to 85°C
Relative Humidity	95% at 40°C, non-condensing
Cooling Required	Mount transmitters with ventilation holes at top and bottom. Leave 6 mm (1/4") between transmitters, or force air with a fan.

Laureate 4-20 mA and RS232/RS485 Transmitter for DC Voltage or Current Input
Click on the radio buttons to build a model number with pricing as shown below. Prices are in US dollars and do not include shipping or duty charges (export sales). Please see our explanations and limitations applicable to pricing and online orders. Prices shown are in US Dollars and are Laurel's manufacturer's suggested retail price (MSRP) in the USA. Orders are processed manually, not directly by our shopping cart system. You don't have to supply credit card information when placing an online order.

North American Orders. Laurel does not sell factory-direct in the USA or Canada. Online sales orders are filled through distribution. During the ordering process, you will have the chance to select an authorized Laurel distributor, or you can ask Laurel to refer you to a distributor. The distributor will then contact you to quote shipping, tax and duty (where applicable), and arrange for payment.

International Orders. If your ship-to address indicates that you are outside of the USA or Canada and Laurel has a distributor in your country, we will forward your order to that distributor for follow-up. If Laurel does not have a distributor in your country, we will email you an order acknowledgment and a pro forma invoice which states the product price, shipping charges, and wire transfer information, which includes a $25 bank wire transfer fee.

Questions about your order? Please email your distributor or sales@laurels.com

Quantity
Transmitter Type		LT 4-20 mA & RS232/RS485 output transmitter	$164
Transmitter Type		LTE 4-20 mA & Ethernet output transmitter	$353
Main Board		2 Standard analog input.	$0
		4 Extended analog input.	$33
	Note:Extended allows custom curve linearization and rate from successive readings. Not applicable to temperature.
Power		0 Isolated 85-264 Vac or 90-300 Vdc	$89
Power		1 Isolated 12-32 Vac or 10-48 Vdc	$89
Signal Input	DC Volts
		DCV1 ± 200.00 mV	$81
		DCV2 ± 2.0000	$81
		DCV3 ± 20.000 V	$81
		DCV4 ± 200.00 V	$81
		DCV5 ± 600.0 V (range not ETL certified)	$81
		DCV6 ± 300.0 V (range ETL certified)	$81
	DC Amperes
		DCA1 ± 2.0000 mA	$81
		DCA2 ± 20.000 mA	$81
		DCA3 ± 200.00 mA	$81
		DCA4 ± 5.000 A	$81
	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.
Add-on Options		-X Extended operating temperature option from -40°C to 70°C	$33
		CBL04 RS232 cable, 7ft. Connects RS232 screw terminals of LT transmitter to DB9 port of PC.	$23
		CBL02 USB-to-DB9 adapter cable. Includes FTDI chip for compatibility with all versions of Windows. Combination of CBL02 and CBL04 connects PC USB port to LT RS232 port.	$47

Configured model number	LT20DCV1
Configured price per model	$334
Quantity	1
Extended price	$334

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4-20 mA & Serial Data Output Transmitter for DC Voltage or Current

DIN rail mounted, digitally programmable. Includes two relays for alarm or control. Exceptional accuracy at high update rates.

Standard Features

Laureate 4-20 mA and RS2332/RS485 Transmitter for DC Voltage or Current Input

For applications assistance, phone 714-434-6131 ext. 104, or email support@laurels.com

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