Nokeval RMD680/RMD681 16/8 Ch Transmitter

Nokeval RMD680/RMD681 16/8 channel universal input transmitter with analog and RS-485 serial output

What are the differences between the RMD680/RMD681 16/8 Channels?Nokeval RMD680 and 681 from Process Parameters

RMD680 – 16 Channel

The RMD680 Multichannel transmitter has been designed for applications where lots of inputs have to be measured and transferred economically either to PC or PLC. The transmitter has 16 input channels, which can be programmed individually for different sensors. Measurement rate is 12 channels per second. Measurements can be read either by serial interface RS-485 using Modbus RTU or Nokeval SCL protocol or with one analog output.

RMD681 – 8 Channel

The RMD681 is an 8 channel measurement unit for temperature sensors and process inputs. The unit has both one analog and serial outputs. The analog output can be selected among the input channels using digital inputs. Every channel has two alarm levels controlling two common alarm relays. The inputs are galvanically isolated from the outputs and the supply voltage, but not from each other. Configuration can be done also with serial RS485 bus.

Input Details

  • Inputs: V, mA, mV, thermocouples, Pt100, Pt1000,KTY83, Ohm
  • Input Channels: 8 (RMD681) and 16 (RMD680)
  • Measuring Rate: 12…25 channels

Output Details

  • Special Functions: Binary input selects measurement channel to output
  • Output Channels: 1
  • Outputs: mA, V
  • Alarm Relays: 2

Connection Details

  • Connection Model: 1.5mm², detachable
  • Bus Interface: RS-485
  • Bus Protocol: Nokeval SCL, Modbus RTU
  • Baud Rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600

Display Details

  • Display Colour: Red
  • Number of Digits: 5 + 2
  • Display: 7 segment LED
  • Digit Size: 7 mm
  • Indicator Lights: configuration state, alarms, serial communication and fault

Power Supply

  • Current Consumption: <100mA
  • Supply Voltage: 24VDC- 20…28VDC

General Information

  • Weight: 320 g
  • Installation: 35mm DIN rail
  • Dimensions (WHD): 150x 100x 60mm
  • Minimum Ambient Temperature: -10°C
  • Maximum Ambient Temperature: 60°C
  • Case Material: Plastic

Please contact us for more information.