When automatic, input and output connected, opening percentile of valve position of input output are the same, but signal can be different, with signal switch function, input and output are isolated.
When manual, can directly modify the output of signal through button.
Automatic to manual is bumpless switching.
Valve position feedback input needed by former level regulator can be get from valve actuator of fields directly, can also be get from backup operator, so when switch manual to automatic, can do bumpless switching.
Main screen show the opening input of former level regulator or DCS system, attached screen show opening output, can be with RS485/RS422/RS232/isolated communication interface
FBBUS-ASCII and MODBUS-RTU optional (MODBUS-RTU just for Modbus, wiring method is the same with RS485).
