ANALOG EXTENSION MRL-IE

The MRL-IE is a compact data acquisition module designed to acquire, process and transmit all sorts of environmental data.It is compatible with all sensors offered by SOMMER Messtechnik and numerous third-party devices equipped with analogor SDI-12 interfaces. The MRL-IE extends the input ports of  MRL data loggers and offers conversion between RS-485 and SDI-12 signals.

The MRL- IE a is equipped with an additional analog output board that adds multiple analog, pulse and digital switch outputs.

VERSIONS

• MRL-IE
• MRL-IEa with additional analog and digital output board

FEATURES

• 8 analog inputs individually configurable
• Signal conversion from analog to SDI-12, RS485 and Modbus RTU
• Signal conversion from SDI-12 to RS485 and Modbus RTU
• Parallel SDI-12, Modbus RTU and analog output
• Acquisition of up to 99 variables
• Multiple sensor voltage supplies

Additionally with MRL-IEa

• Signal conversion from SDI-12 and RS485 to analog
• Impuls output of acquired quantities, e.g. for flowmeters
• Parallel SDI-12, Modbus RTU, analog and impuls output

SPECIFICATIONS

• Power supply 9…28 VDC; Overvoltage and reverse voltage protection, deep-discharge protected if used with optional battery
• Power consumption min. 0.65 mA @ 12V
• Sensor supply
  • 500 mA @ 5 V
  • 500 mA @ 12/14 V
  • 500 mA @ switched supply voltage
• Referenced sensor supply
  • 200 mA @ 2.5 V
  • 100 mA @ 2.5 V (wind vane reference)
• Inputs
  • 8x Analog 0…2.5 V / 4…20 mA / Resistance;16 bit resolution (internal 100 Ω-shunts)
  • 1x Counter (max. 25 Hz @ 50% duty cycle)
  • 1x Wind speed (frequency)
  • 1x Wind direction (potentiometer)
  • 1x RS-485
  • 1x SDI-12 as primary/master (version 1.3)
  • All analog inputs are equipped with overvoltage fine protection up to 36 V
• Outputs
  • 1x RS-485 (9600…115200 Baud), ModbusRTU
  • 1x SDI-12 as secondary/slave (version 1.3)
  • Additionally with MRL-IEa
  • 4x Analog current output
  • 6x Switched output @ supply voltage (can be used as pulse output by adding a pulldown resistor)
• Number of recorded variables max. 99
• Measurement interval 2 s … 12 h
• Statistics interval 10 s … 12 h
• Operating temperature -40…60 °C (-40…140 °F)
• Storage temperature -40…60 °C (-40…140 °F)
• Protection rating IP67
• Lightning protection Integrated protection against indirect lightning with a discharge capacity of 6 kAPpp
• Housing material Aluminium, powder coated
• Size L x W x H 180 x 150 x 90 mm (7.09 x 5.91 x 3.54 inch)
• Weight 1.48 kg (3.26 lb)