8,16 channel universal input transmitter with analog and RS-485 serial output
Multichannel transmitter 6680 has been designed for applications where lots of inputs have to be measured and transferred economically either to PC or PLC. 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. Up to 32 devices can be connected to the same serial bus without repeaters. It takes 30ms to read all channels from one device, thus 512 channels can be read in less than second.
When analog output is used, output channel is selected with a 4-bit digital input. Transmitter has also 4-bit digital input for enabling its analog output thus total channel count can be increased to a maximum of 256 channels by connecting mA outputs of several devices in parallel. This way all channels from one device can be read in less than one second. Every channel can be configured totally individually. Channel inputs are differential thus channels don’t affect on each other. Transmitter has two alarm relays, that can work as common alarms: if any channel passes alarm limit, the relay activates. Device can be configured either with front panel keys or with serial interface using Mekuwin configuration software. Transmitter is compatible with WinX and PromoLog data-acquisition software and any third party software with Modbus communication.
