Nokeval 6841 Transmitter for Strain Gauge Sensors

Nokeval 6841 – A Transmitter for Strain Gauge Sensors

The Nokeval 6841 is a DIN rail mounted strain gauge / weighing transmitter. It is equipped with a small display and push buttons to allow configuration without a separate programming device. There is also two alarm relays, analog output, and RS-485 serial output with Nokeval SCL and Modbus protocols. The sensor can be connected using 6-wire measurement to eliminate wire resistance effect. Sensor excitation is about 10 V DC.

The device can be calibrated / teached in up to six points.

Key Features

  • Output 0/4..20 mA, 0..10 V
  • Strain gauge sensors with 4- or 6-wire connection
  • Excitation voltage 10 V to sensors, max 150 mA
  • Settings via front panel keys
  • Serial communication RS-485
  • 2 alarm relays
  • Taring via front panel keys or external switch
  • Measuring accuracy < 0,05 %
  • Power supply 12..32 VDC or 85..240 VAC
  • Linearisation 6 points

Input Details

  • Inputs: Strain gauge sensors
  • Input Channels: 1
  • Measuring Range: max 4 x 350 Ω parallel
  • Measuring Rate: 4…14 measurements / s
  • Drift: 0.003 % / °C
  • Accuracy: 0.05% full scale

Output Details

  • Output Loading: mA: 0…600 Ω
  • Output Channels: 2
  • Accuracy: 0.05% full scale
  • Outputs: mA, V
  • Alarm Relays: 2

Connection Details

  • Connection Model: 2.5mm², detachable
  • Bus Interface: RS-485
  • Bus Protocol: Nokeval SCL
  • Baud Rates: 1200, 2400, 4800, 9600, 19200, 38400

Display Details

  • Display Colour: Red
  • Number of Digits: 4
  • Display: 7 segment LED
  • Digit Size: 7 mm
  • Indicator Lights: configuration state and alarms

Power Supply

  • Supply Voltage: 85..240 VAC
  • Supply Voltage (optional): 12..32 VDC/ 24 VAC

General Information

  • Weight: 240 g
  • Installation: 35 mm DIN rail
  • Dimensions: 45 x 100 x 110 mm (WHD)
  • Minimum Ambient Temperature: 0°C
  • Maximum Ambient Temperature: 60°C
  • Case Material: Plastic