Voltage measurement transducer MB-3U-1

Voltage measurement transducer MB-3U-1

MAX-MB-3U-1, 5908312595311

Product description

3F voltage measurement transducer with MODBUS RTU output.
MB-3U-1 transducer is designed to measure the voltage and to transmit the data via RS-485 port using MODBUS RTU protocol.

The module continuously measures the values of the input alternating voltage and input direct voltage (three-phase alternating current voltage or voltage circuits of direct current). Readout of recorded voltage and setting of all communication parameters are carried out through RS-485 port using the MODBUS RTU communication protocol. Power up is indicated by a green LED U light. Valid data exchange between the module and the second device is indicated by a yellow LED Tx light.
The transducer measures the effective value of TrueRMS voltage, which ensures high accuracy even with distorted flow.  

For alternating voltage measurement is made in relation to the neutral conductor N. For direct voltages measurement is made in relation to a common power supply point- or GND. Do not perform simultaneous measurement of direct and alternating voltages.
Measurement channels are not galvanically isolated from each other. Measurement channels are galvanically isolated from the transducer power supply input and the RS-485 communication port. RS-485 port is not separated from the power supply.

Reset communication settings
Under cover is available code switch.
Details of resetting available in the instructions below.

Power supply voltage9÷30 V DC
WE-WY breakthrough voltage3 kV
Communication protocolMODBUS RTU
The type of workSLAVE
Baudrate1200÷115200 bit/s
Data bits8
Stop bits02-sty
Bits of parityEVEN / ODD / NONE
Maximum measuring error0,50%
Processing error±0,5%
Measurement range TrueRMS - alternating AC voltage0÷285 V
Measurement range TrueRMS - DC voltage0÷400 V
Power consumption (max)50 mA
Precision of reading the register1 V
Sampling frequency10 Hz
Relative air humidity (for 3085%
Terminalpluggable terminal blocks 2,5 mm²
Tightening torque0,4 Nm
Dimensions1 module (18 mm)
Assemblyon rail 35 mm
Ingress Protection MarkingIP20

Module in RS-485 network

Setting the network address

Measurement voltage

Reset communication settings

Communication parameters MODBUS RTU protocol