Specialized manufacturer of Digital Pressure Meters and Load Cells



Compact Strain Gauge Module with RS-485 (Modbus RTU) Interface
VWM30R series

High-efficiency digital filter adopted!

Reliable weighing even in environment subject to frequent vibration

  • DIN rail mounting type suitable for installing into control box
  • Flow rate calculation function included
  • High-speed sampling 1000 times per second
  • Internal resolution Approx. 16,000,000
  • High-performance dual digital filter included
  • Remote I/O functions (Input terminal status monitoring, output terminal ON/OFF)
  • Control I/O (6 inputs, 8 outputs) included as standard feature
  • Other functions include: Gravity acceleration correction, higher order linearity correction (digital linearization), HI/LO limit detection, hold, dual digital filter, load cell connection diagnosis, etc.

Analog unit

Input sensitivity Over 0.15µV/d (d=minimum division)
Maximum measurement range -35mV to +35mV (-7mV/V to +7mV/V)
Zero adjustment range -35mV to +35mV (-7mV/V to +7mV/V)
Load cell excitation DC5V±5%, 60mA
Remote sensing function included
Up to 4 × 350Ω load cells can be connected
Temperature coefficients Zero: ±0.02µV/°C (Typ.), ±0.1µV/°C (Max.)
Span: ±3ppm/°C (Typ.), ±15ppm/°C (Max.)
Nonlinearity 0.005% of F.S. Max.
Input noise Less than 0.3┬ÁVp-p (Typ.)
Input impedance 10MΩ and above
A/D conversion method Delta-sigma modulation
Internal resolution Approx. 16,000,000
Display resolution Max. 99,999d (within 20,000d recommended)
Sampling rate 1000 times per second
Calibration Actual load calibration or digital span calibration not using actual load.

Digital unit

Display elements Measurement display: 5-digit red LED 7-segment display, Character height 5.3mm
Polarity display: 1 red LED
Status display: 6 red LED
Measurement display Adjustable net/gross weight display
Display range: -99,999 to 99,999 (Minimum division (d) options 1, 2, 5, 10, 20, 50)
Status display GROSS, NET, HOLD, STABLE, ZERO, and custom user-defined function
Key switches F/ESC, →(Zero), ↑(Zero offset), ENT
Communication display range -99999 to 99999 (5 digits) or -999999 to 999999 (6 digits) selectable


Load cell input terminal 7-pin spring-clamp terminal block
RS-485 Power clamp Board mount header (3M)
Control I/O /
Standard serial output
20-pin MDR connector (Female)
* Cable-side connector not included.

General specifications

Memory backup Nonvolatile memory can hold data for more than 10 years
Power supply voltage DC24V
Power consumption 6W (Max.)
Operating temperature and humidity range -10°C to 50°C/ Below 85%RH (Condensation must be avoided)
External dimensions 35(W) × 110(H) × 101(D) mm
Attachment method DIN rail mount
Weight Approx. 200g
Function Dual digital filter (HPDF1, HPDF2), Control I/O can be assigned with functions as desired, Sequential weighing, Remote I/O, Gravity acceleration correction, Linearity correction function, HI/LO limit detection function, Hold, Load cell connection diagnosis, Near zero detection, Zero tracking, Power-on zero, Flow rate calculation function (Calculates flow rate per hour/min./sec.)
Accessories Basic instruction manual, RS-485 connector (3M, 35505-6200-A00 GF)



Application Guide

Conveyor weight checker

Application Guide

Dimensions (Unit: mm)

External dimensions

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