DIGITAL MONITORING RELAY SPEED MONITORING FROM 0.1 TO 2200 REV/MIN OVERSHOOT AND UNDERSHOOT SUPPLY VOLTAGE: AC/DC 24V DC AND AC 50 TO 60 HZ NO GALVANIC ISOLATION FROM MEASURING CIRCUIT STARTUP DELAY 1 TO 900S TRIP DELAY 0.11 TO 99.9S HYSTERESIS 0.1 TO 99 REV/MIN 1 CO CONTACT W. OR W/O ERROR LOG SPRING-LOADED CONNECTION