What are the differences between the RMD680/RMD681 16/8 Channels?
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. The 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 analogue output.
RMD681 – 8 Channel
The RMD681 is an 8 channel measurement unit for temperature sensors and process inputs. The unit has both one analogue and serial outputs. The analogue 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.