If additional XDATA-compatible sensor is connected to OIF, it receives data from the additional XDATA sensor, increments instrument number by 1, and sends this data immediately after receiving the CR.
Additional sensor data can be in any order (except that the OIF data always comes first), meaning that the instrument numbers are not in an ascending order. For example:
xdata=050108CA186A0750B637CRxdata=0203000900090009000900090009CRxdata=10021FF44487A04E0410018FLFCR xdata=0304001000100010001000100010CR
If additional sensor CFH is connected to OIF, OIF sends
xdata=050108CA186A0750B637CRxdata=10021DB6BC8795200443018FLFCR
where LF = line feed, CR = carriage return.