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)
