Dold Speed Monitoring Relay, DPDT, DIN Rail

Detection of high or low-rpm / stand still (adjustable function)
Large setting range 1 ... 120.000 IPM or 0.15 ... 20.000 Hz (10 ranges each)
As option with input for NAMUR-sensors with sensor and wire protection against interruption and short circuit
Adjustable hysteresis 0.5 ... 50 %
Adjustable start up time delay 0 ... 50 s, control with external contact
Adjustable monitoring time for missing input signal at function over frequency, additional using as standstill level
Programmable via terminals:
Alarm delay of 0 ... 100 s
with manual reset or auto reset
LED-indication for auxiliary voltage, measuring input and output relay, additional LED for indication of wire- / sensor failure at NAMUR-input
Auxiliary voltages AC 230 V and DC 24 V in one unit
2 changeover contacts, closed circuit operation
Open circuit operation on request
As option with analogue output, proportionally to speed
Device available with 2 response values and separately controlled output relays for under- and over frequency see
MK 9055N/5_ _
MH 9055 with wide input range for auxiliary voltage (AC/DC 24 ... 60 V or AC/DC 110 ... 230 V)