Monitor for speed, standstill, direction

DZ 251 and DZ 252 are desinged for monitoring overspeed, underspeed with start-up delay, standstill and
direction rotation. Both types are similar in construction and function and are only diferent with respect to their
outputs:

DZ 251: 4 opto-isolated transistor outputs to signal speed alarm, standstill, forward and reverse rotation.

DZ 252: relay outputs (potential free changeover 230 V / 100 VA) of each relay can be assigned by setting internal jumpers (eg. relay 1 = overspeed and relay 2 = standstill).