Spool Position Monitoring

Description

Control blocks with spool feed-back requirements, e.g.:

– Loader cranes

– Telehandlers

– Aerial working platform

– Earth moving machinery

– Construction machinery

– Forestry and Agricultural

Universal device suitable for compact directional valves entire portfolio.

Contact-free detection of the control spool position via Hall effect sensor

Analog voltage output signal

Operating voltage supply: 8 to 32 VDC (according to ISO 16750-2)

Electrical connection: M12 5 pin

Degree of IP protection: IP67 or IP69K (according to connection cable selection at page 2)

Maximum working pressure: 250 bar*

The spool position sensor has been developed as an option suitable for the compact directional valves entire portfolio (modular directional valve, flow diverters, etc…). The valve must be ordered with spool sensor since beginning because each single unit must be set with special dedicated tool. In case of failure, the valve must be returned to the company, any recalibration or resetting is only made by factory.

Description

M12 5 PIN male connector (sensor view)

PIN1 = Reverse analog output (Vout-r) *

PIN2 = Analog output (Vout)

PIN3 = Supply voltage (U+)

PIN4 = Ground (GND-)

PIN5 = Not to be used

Shielded cable with connector M12 4 PIN female.

The spool position sensor monitors the position of the control spool in directional CDV valves. The position of the control spool is detected and monitored by a contact- free Hall Effect sensor by reading the movement of the permanent magnet mechanically connected with the spool and is converted by the electronic board into an analog voltage signal through a calculation. When one coil is energized, it pushes the control spool and the "permanent magnet" changes position as well as the magnetic field. The Hall sensor reads the magnetic field translation and modifies electrical feedback. The electronic board is housed in a non-magnetic palstic box attached by two screws to the valve body. A metallic shield wraps the plastic box to protect the spool position sensor from electromagnetic disturbances. The anti-rotation device ensures repeatability of the readings. The connector is a Molex Ultralock M12 5 PIN male.