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4-20 mA Current Output Transmitter
for Process Signal Input

 Scalable for process signals requiring zero and span adjustment.
Ideal for pressure & flow. DIN Rail mounted, digitally programmable.

  
CE Mark      RoHS Mark
Made in California

Standard Features
  • 200 mV, 2V, 20V, 200V, 300V & 600V DC voltage input ranges
  • 2, 20, 200 mA and 5A DC current input ranges
  • All ranges factory calibrated
  • Digital span adjust from 0 to ±99,999
  • Digital zero adjust from -99,999 to +99,999
  • 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 Reasonabley (basic process transmitter)
    Options:
  • Extended main board for custom curve linearization & rate from successive readings
  • Low voltage power 10-48 Vdc or 12-30 Vac

Description

The Micron 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 Micron 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 Micron 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 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).

Specifications
Micron 4-20 mA Output Transmitter for Process Signal Input

Analog Input
Range
Input Ohms
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
Current
 
 
 
2.0000 mA
20.000 mA
200.00 mA
5.000 A
100 ohms
10 ohms
1 ohm
0.01 ohm

Input Resolution
Input Accuracy
Update Rate, Max
Max Applied Voltage
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 5A
Analog Output (standard)
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
Transducer Excitation Output (standard)
Output levels
Output isolation
5V@100 mA, 10 @120 mA, 24V@50 mA (jumper selectable)
50V from signal ground
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
Serial Communications (standard)
Signal Types
Data Rates
Output Isolation
Serial Protocols
Modbus Modes
Modbus Compliance
Digital Addressing
RS232 (default) 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.
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 12-30 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
Case Dimensions
Case 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
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.

 

Pinout
Micron 4-20 mA Output Transmitter for Process Signal Input

 

Custom curve linearization

Using a linearizing digital panel meter or transmitter

A Micron process meter or transmitter with the Extended main board option allows exceptionally accurate custom curve linearization. For setup, up to 180 data points can be entered into a spreadsheet. The system then creates multiple non-linear spline-fit segments, which provide much better accuracy than linear segments. One application, as illustrated, is the readout of volume of irregularly shaped tanks based on measured liquid level or pressure. Altimeters and thermistors are further applications.
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