... Speed inputs and PWM output, counters, timers,real time clock and time switch functions, removable keypad LCD, 3 built-in ... RTC accuracy : MAX ±5S/dayRTC time intervals : 256RTC Backup at 25 °C : 100 hours, Li-ion battery (optional)Power-off ... integrated, pre-tested functions – No additional devices, such as elapsed time counter, are requiredLinking of 512 functions is possible – Extensive applications ...