Speed monitor, 1-channel, operating voltage 20,250 VAC / 20,125 VDC, monitoring of limit values and ranges for overshoot and undershoot, operating range 0.06...600,000 min-1, stepping output Ex [ic Gc] II C/II B, parameterization via PC (FDT/DTM), front-side buttons or HART, ring buffer for 8000 measured values, display, all-round galvanic isolation, input protected against reverse polarity, ATEX, IECEx, CFMUS, TR CU, NEPSI, TIIS, Kosha, use in zone 2