Timing can be set to count upwards or downwards fastening with retaining spring in the front panel aperture 45 x 45 mm or 35 mm din rails 8 functions a delayed pick up a2 delayed pick up with power failure detection b delayed pick up with control contact c delayed drop off with control contact d momentary pick up with control contact e delayed pick up with impulse control f flasher pause start g delayed pick up with control contact additive voltage failure detection