Kubler preset timers measure the time in the unit of time, for which the device is laid out (see also timers). With preset timers one, two, four or six outputs, as relay or optocoupler outputs, are additionally available. A particular output is activated, as soon as a preselected value is reached. This can occur both in adding or subtracting mode. The signal duration is programmable either as a momentary (timed) pulse or as a maintained (latched) pulse.