TAIO-15-1 module can provide any PLC system with one analog input and one analog output, both in the range of 0-10V and both isolated from the communication bus as well as from the input power supply.
The analog input is hi-Z (100kOhm to GND) and can be read using the MODBUS “Read Input Registers” command where the register address is 0. 0V reads as 0 and 10V reads as 32767 or 7FFFh.
The analog output provides a voltage level output of 0-10V and can be set using either one of the “Write Single Register” and “Write Multiple Registers” MODBUS commands where the register address is 0. A value of 0 produces 0V output voltage where 32767 or 7FFFh produces 10V.
The module uses 2 DC-DC converters in order to provide 3 galvanicly isolated parts:
- the 24V power supply input
- the RS422 / 485 interface
- the analog connectors