WObit • MD150A • digital display with 0-10V/4-20mA input

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WObit • MD150A • digital display with 0-10V/4-20mA input

MD150A measurement indicator for sensors is equipped with a digital transmitter that measures voltage with a resolution of 1 mV, giving 10,000 measuring divisions for the 0-10 V range. The measurement result is presented on a six-position display.

The unit has 2 relay output that can be freely configured to switch on/off at specific thresholds.

Furthermore, the device also has 2 universal digital inputs. These can be used to externally trigger measurements and ‘pause’ the current measurement.

The MD150A is also equipped with a USB and RS485 MODBUS interface. The USB interface allows the instrument to be quickly configured and the measurement data to be recorded on a PC to a file or on a chart.  MODBUS-RTU enables the reading of measurements from several indicators simultaneously to a PLC, HMI panel or own PC application.

The free MD150A PC software is used to configure the MD150A indicator and to record the measurements to a file or on a chart. The configuration process is very simple and consists of entering the range of the input signal from the sensor and the range of the value displayed on the indicator. Communication with the computer is via USB.

The MD150A indicator has a full aluminium profile in accordance with the DIN43700 standard, guaranteeing a high mechanical strength and resistance to adverse external conditions, including electrical disturbances.


  • Voltage or current measurement with a resolution of 10,000 measuring points (1 mV),
  • Filtering the signal,
  • Converting voltage / current to any units,
  • Changes in relay output states based on set thresholds
  • Transfer of measurement data to a PC (USB) or master device, eg HMI panel, PLC (RS485 MODBUS-RTU)

Datasheet: WObit_MD150A

Manual: WObit_MD150A



Weight 0,2 kg


Power supply

15 … 36 VDC, recommended 24 VDC, min. 250mA

Sensor supply output

Resolution <10000 measurement steps
(0-10V: ±1mV, 0-20mA: ±4uA)
Input resistance 30KΩ
Non-linearity error: 0,05% FSR
Temperature error: 0,03% FSR/1°C
Max. measurement frequency: 100Hz

Digital inputs DIN1, DIN2

Low status 0V (max. 2V), high status +24V (5…24V)

Relay outputs PK1, PK2

2 x 1A/125VAC, 2A/30VDC


RS485 MODBUS-RTU, default parameters 38400bps, 8:n:1,
USB: 1.1, 2.0

Operating temperature range


Initial heating time

20 min.


6 digits, height 13.5 mm


200 g


45 x 92 x 81 mm

IP class

IP40, IP65 for the front panel

Consumer sale





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