4-20 mA Current Output Transmitter
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Standard Features
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Description The Laureate 4-20 mA output, process signal input transmitter provides six DC voltage input ranges and four DC current input ranges for use with a wide range of transducers whose output requires zero and span adjustment. All ranges are factory calibrated and jumper selectable. The two most sensitive voltage ranges, 200 mV and 2V, provide a high input impedance of 1 Gohm to minimize the load on the voltage signal. 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. Digital signal filtering modes are selectable for stable readings in electrically noisy environments. The internal digital readings and analog output can be individually selected to be either unfiltered or filtered. 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. Standard features of Laureate transmitters include:
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). |
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Specifications
Laureate 4-20 mA Output Transmitter
for Process Signal
Input
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Analog Input |
Range | Input Ohms |
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Voltage |
200.00 mV 2.0000 V 20.000 V 200.00 V 600.0 V |
1 Gohm 1 Gohm 10 Mohm 10 Mohm 10 Mohm |
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Current |
2.0000 mA 20.000 mA 200.00 mA 5.000 A |
100 ohms 10 ohms 1 ohm 0.01 ohm |
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Input Resolution |
16 bits (65,536 steps) |
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Analog Output (standard) |
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Output Levels |
4-20 mA, 0-20 mA, 0-10 Vdc (jumper selectable) |
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Transducer Excitation Output (standard) |
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Output Levels |
5V@100 mA, 10 @120 mA, 24V@50 mA (jumper
selectable) |
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Dual Relay Output (standard) |
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Relay Type |
Two solid state relays, SPST, normally open,
Form A |
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Serial Communications (standard) |
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Signal Types |
RS232 (default) or RS485 (half or full duplex) |
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Power Input |
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Standard Power |
85-264 Vac or 90-300 Vdc (DC operation not UL approved) |
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Mechanical |
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Dimensions |
120 x 101 x 22.5 mm |
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Environmental |
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Operating
Temperature |
0°C
to 55°C |
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Pinout
Laureate 4-20 mA Output Transmitter
for Process Signal
Input

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Custom
curve linearization
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Ordering
Guide
Laureate 4-20 mA Output Transmitter
for Process Signal
Input
Click on the radio buttons to build a model number with pricing (shown below the Ordering Guide).
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