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GK411 Weight Control Transmitter

GK411 weight control transmitter is a highly precise, modular and integrated conversion device converting the output signal of a resistance strain sensor into a digital signal with a unit of mV/V and setting two weight limits for digital ou
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  • Application
  • Features
  • Dimensions
  • Parameters
GK411 weight control transmitter is a highly precise, modular and integrated conversion device converting the output signal of a resistance strain sensor into a digital signal with a unit of mV/V and setting two weight limits for digital output control. It is mainly used as a part for electric signal measurement and digital conversion in the device controllers for quantitative bagging, batching and weight grouping and on other occasions with similar functional requirements as well.

The product has a supply voltage of DC24V and provides 5V/60mA resistance strain sensor excitation power supply, three digital output ends and one digital input end. The strain input end, the digital communication end and the power terminals are electrically isolated by an isolation voltage of 1,500 V.

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● Designed for widely used resistance strain bridges, provided with measurement signal input end which is differential input end.
● With a digital output unit of mV/V, which is the same as resistance strain sensor. Realize no-real-object calibration for systems.
● Provide options including digital communication output, analog signal output and LED for choosing for measurement data and support MODBUS-RTU communication protocol based digital communication.
● Provide digital signals as control signals for automatic scales for quantitative bagging, batching, weight grouping, etc.
● Support parameter setup for scales (if an LED is provided).
● With internal configurable digital filter with four intensity levels for the stain measurement channel for easy application.
● Configure operating parameters through the read and write operations of register to choose the most appropriate performance.
Analog input performance  
Measurement range ±4.0 mV/V (equivalent to ±20.0 mV)
Range of zero offset ±1.0 μV/V (room temperature, equivalent to ±5.0 μV)
Zero temperature drift ≤0.05μV/V/°C (equivalent to 0.25μV/°C )
Range error ≤0.1%FS
Range temperature coefficient ≤10ppm/°C
Noise ≤0.5μVp-p (@ AD conversion rate = 80Hz/s)
Nonlinear error ≤0.005%FS
Analog output performance Analog output performance
Zero error ≤4μA or 1mV (room temperature)
Zero temperature drift 0.1μA/°C or  0.25mV/°C
Range accuracy ≤0.25%
Range temperature coefficient ≤50ppm/°C
Nonlinear error ≤0.05%FS
Digital output performance Digital output performance
Full-range output code ±50,000
AD conversion rate 80 (Hz/s)
Form of communication interface RS485
Baud rate 9,600
Communication protocol MODBUS—RTU
Communication distance ≤1000m
Operating conditions  
Ambient temperature -25°C ~ 50°C
Operating voltage DC24V±25%
Isolation voltage 1500V
Bridge power supply 5V/60mA
Power supply for the speed sensor 24V/50mA