Revolution counter CMD6-2W/12-24V
W=(3 ÷ 60'000 rpm), Us=12÷24V ac/dc, 2 outputs 4A/220V, 95x49x113mm
The CMD6-2W/12÷24V digital revolution counter is a microprocessor device with a 6-digit display and serves for measuring revolutions in the range from 3 to 60'000 rpm. The rev counter is used for controlling the revolutions of rotating objects in the range between two limit values "Down" and "Up". It has two output relays. The relay-1 switches on when the revolutions are lower than "Down" and the relay-2 switches on when the revolutions are higher than "Up". The tachometer can be used for controlling the minimum permitted revolutions of elevators and other rotating mechanisms. The digital rev counter receives a signal from sensors and switches type "NPN" connected to his input. The tachometer is designed for installation in a dashboard (panel montage).
The CMD6-2W digital revolution counter is used for measuring and controlling the revolutions of rotation of axles, motor rotors and other rotating objects within a certain range between two limits of revolutions "Down" and "Up". It is designed for combined work with inductive, photoelectric and other sensors, from which pulses are sent to the input of the rev-counter. For the correct work of the system “rev-counter - sensor" it is necessary to sending one impulse from the sensor to the revolution counter for one full rotation of the object. There can be assign two limit values of the revolutions “Down" and "Up". If the measured revolutions are greater than the "Down" and less than "Up" output relays are off, otherwise they are turn-on. By pressing the "sec" and "Hz" buttons, the period of rotation of the axis in seconds (sec) and the frequency in hertz (Hz) is shown on the display of the revolution counter.
|Digital indication, LED - red||6 digits, h=10 mm (height)|
|Range of revolutions measurement, W||3 ... 60’000 rpm (600'000 rpm option)|
|Supply voltage, Us||12÷24V ac/dc (11÷31Vdc / 11÷27Vac)|
|Power consumption, P||3 W (125 mA)|
|Output - Relay-1 (Down)||4A/220VAC (NO+NC)|
|Output - Relay-2 (Up)||4A/220VAC (NO+NC)|
|Maximum frequency of the input pulses||1 kHz (11 kHz option)|
|Operating temperature, Tamb||-20º...+50º C|
|Degree of protection||IP40|
|Overall dimensions||95х49х113 mm|
|Limit value, Down (rpm)||3 ÷ 60'000|
|Limit value, Up (rpm)||3 ÷ 60'000|
Timing diagram of operation of the CMD6-2W revolution counter
Schemes of connection
Scheme of connection of NPN sensor to the input of the rev-counter
Scheme of connection of switch K1 to the input of the rev-counter
PNP sensor connection diagram
Scheme of connection of PNP sensor to the input of the rev-counter by adding a resistor 2K / 0.5W.
Overall dimensions (mm)
The CMD6-2W digital tachometer is an electronic device used as a means of automating production processes. Serves to convert the electrical impulses received to it in revolutions (rpm). The main purpose of the tachometer is to visualize the measured revolutions on a digital display and when a certain limit value is reached to turn off or on the electrical circuit to which it is connected.
Typical parameters of digital tachometer CMD6-2W
|CMD6-2W / 12-24V||11÷31VDC / 11÷27VAC||3W (125mA)|
|CMD6-2W / 220V||220VAC ±10%||4W (16mA)|