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Standard Features
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DescriptionThe Micron 4-20 mA output, AC RMS input transmitter provides six voltage input ranges and four current input ranges, all factory calibrated and jumper selectable. A special 5.000A range utilizes a built-in 0.01 ohm shunt to accept the output of 5A current transformers, with no need for a step down transformer. The current readings can easily be scaled digitally as needed. True RMS precision circuitry is used to determine the root-mean-square of complex waveforms from 10 Hz to 10 kHz. Spikes up to 2.4 times the maximum of each range are accurately measured. This provides a crest factor (Vp / Vrms) of 240 for a signal amplitude of 1% of full scale, decreasing to 2.4 at 100% of full scale. Three analog transmitter settings are jumper selectable: 4-20 mA, 0-20 mA or 0-10V. The output tracks the reading up to 99,999 counts that would be transmitted digitally. For AC RMS signals, this reading has an accuracy of 0.1% of full scale from 1% to 100%, 10 Hz to 10 kHz, and can be calibrated 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 Micron transmitters include:
Easy Transmitter programming is via Micron'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 Micron (P/N CBL04). |
Range |
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Voltage Ranges (1% to 100% of FS) |
200.00 mV |
10 µV |
1 Mohm |
Current Ranges (1% to 100% of FS) |
2.0000 mA |
0.1 µA |
100 ohms |
A-to-D Resolution Conversion Accuracy Input Settling Time Max Applied Voltage Current Protection |
16 bit A/D converter 0.1% of full scale from 1% to 100%, 10 Hz to 10 kHz 1 sec to 0.1% of step 600 Vac for 20, 200 & 600 V ranges, 50 Vac other ranges 25x for 2 mA, 8x for 20 mA, 2.5x for 200 mA, 1x for 5A |
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Analog Output (standard) |
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Output Levels Compliance, 4-20 mA Compliance, 0-10V Output Resolution Output Accuracy Output Isolation |
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 |
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Dual Relay Output (standard) |
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Relay Type Load rating |
Two solid state relays, SPST, normally open, Form A 130 mA at 140 Vac or 180 Vdc |
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Serial Communications (standard) |
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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, Micron 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. |
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Power Input |
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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 12-30 Vac DC or 47-63 Hz 250V rms working, 2.3 kV rms per 1 min test 2 Watts |
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Mechanical |
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Case Dimensions Case Mounting Electrical Connections |
120 x 101 x 22.5 mm 35 mm rail per DIN EN 50022 Detachable screw-clamp plugs |
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Environmental |
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Operating Temperature Storage Temperature Relative Humidity Protection Cooling Required |
0°C to 55°C -40°C to 85°C 95% at 40°C, non-condensing NEMA-4X (IP-65) when panel mounted Mount transmitters so that ventilation holes are at top and bottom. Leave 6 mm (1/4") between transmitters, or blow air by means of a fan. |
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