There are 4 Digital Output lines available on the 15 pin socket on the left hand side of the instrument.

The output lines can be used for many purposes, e.g. indicating Overload conditions or critical activities in the instrument.
One of the output lines can be used as a master for synchronizing the measurement sampling in two or more instruments.

The output signals are 3.3V level compatible. The maximum output current per pin is 20 mA.
Pin number 6 holds a stable 3.3V reference signal (max 10 mA).
Pin 14 (and the housing) is digital ground.

Pin number Function
1 DO-1 Out Digital output
2 DO-2 Out Digital output
3 DO-3 Calibration (high=on)
11 DO-4 In Digital output