Voltage measurement transducer MB-3U-1

Voltage measurement transducer MB-3U-1

MB-3U-1

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.

Functioning
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.
PLEASE NOTE!
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├Ě30 V DC
WE-WY breakthrough voltage3 kV
portsRS-485
Communication protocolMODBUS RTU
The type of workSLAVE
Speed ??- adjustable1200├Ě115200 bit/s
Data bits8
Stop bits02-sty
Bits of parityEVEN / ODD / NONE
Address1├Ě247
Maximum measuring error0,50%
Processing error┬▒0,5%
Measurement range TrueRMS - alternating AC voltage0├Ě285 V
Measurement range TrueRMS - DC voltage0├Ě400 V
Maximum power consumption50 mA
Precision of reading the register1 V
Sampling frequency10 Hz
Relative air humidity (for 3085%
terminalscrew terminals 2,5 mm┬▓
Tightening torque0,4 Nm
dimensions1 module (18 mm)
Assemblyon rail 35 mm
Level of securityIP20



Module in RS-485 network





Setting the network address




Measurement voltage




Reset communication settings

Communication parameters MODBUS RTU protocol


  


 

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