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Modbus & Serial 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 input voltage ranges
  • 2, 20, 200 mA & 5A input current ranges
  • All input ranges selectable & factory calibrated
  • Accuracy to 0.01% of full scale
  • RS232 or RS485 serial communications, half or full duplex, isolated
  • Modbus RTU, Modbus ASCII or Micron ASCII protocol
  • Output update rate to 60/sec
  • 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
  • 0-10V, 4-20 mA  or 0-20 mA  transmitter output, isolated
  • Universal AC power, 85-264 Vac
  • Priced Reasonably (basic DC transmitter)
    Options:
  • Extended main board for custom curve linearization & rate from successive readings
  • Low voltage power, 10-48 Vdc or 12-30 Vac

4-20 mA Current Transmitter for DC Voltage or Current
CE Mark       RoHS Mark
Made in California

Description

The Micron Modbus & serial output, DC input transmitter provides six voltage input ranges and four current input ranges, all factory calibrated and jumper selectable. Accuracy is ±0.01% of full scale input. 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. An isolate transducer excitation output is standard.

LTM Series serial output transmitters send data via an isolated serial port, which is user configurable for RS232 or RS485 and full or half duplex operation. Three protocols are user selectable: Modbus RTU, Modbus ASCII, or Micron ASCII. Modbus operation is fully compliant with Modbus Over Serial Line Specification V1.0 (2002). The Micron ASCII protocol allows up to 31 Micron devices to be addressed on the same RS485 data line. It is simpler than the Modbus protocol and is recommended when all devices are Microns. It also allows use of Micron Datalogging Software.

Standard features of Micron transmitters include:

  • Serial data output, 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.
  • Analog transmitter output, 16-bit, user scalable and isolated. User selectable 4-20 mA, 0-20 mA or 0-10V levels.
  • 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 Modbus & Serial Output 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
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
Transducer Excitation Output (standard)
Output levels
Output isolation
5V@100 mA, 10 @120 mA, 24V@50 mA (jumper selectable)
50V from signal ground
Serial Data Output (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, Micron ASCII
RTU or ASCII
Modbus over Serial Line Specification V1.0 (2002)
247 Modbus addresses.
Up to 32 devices on RS485 line w/o a repeater
Dual Relay Output (standard)
Relay Type
Load rating
Two solid state relays, SPST, normally open, Form A
120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance
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
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 Modbus & Serial Output Transmitter for DC Voltage or Current Input

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