HMR4007 SENSOR PRODUCTS HMR4007 Linear Position Sensor User’s Guide • • • www.magneticsensors.com Solid State Electronics Center (800) 323-8295 Page 1...
HMR4007 INTRODUCTION The Honeywell HMR4007 is an electronic linear position sensing solution for use in commercial and industrial application environments. A stationary array of Honeywell’s magnetoresistive (MR) sensors is utilized to quickly and accurately monitor the position of a small magnet attached to a moving object such as a valve stem or hydraulic cylinder.
HMR4007 SPECIFICATIONS Characteristics General Accuracy Resolution Hysteresis Repeatability Update Rate Standoff Distance (gap) between the target magnet and the sensor board Magnetic Field Range magnetic field at the sensor array length apparent magnet length at sensor array Orientation Electrical Input Voltage...
The HMR4007 uses an on-board low drop out (LDO) +5 volt regulator so that a regulated +5 volt power supply or an unregulated power supply in the range of +6VDC to +28VDC can be used. The power is supplied to the board through one of the three user ports being (serial, analog, or USB) and a jumper is used to select which port is the power source.
HMR4007 PHYSICAL CHARACTERISTICS The circuit board for the HMR4007 Linear Position Sensor is approximately 340mm by 80mm. A 6-pin right angle connector (J1) and two 4-pin connectors (J2, J3) protrude from the back of the board for user connections. Components on the top-side have a maximum height of 12mm.
USING THE HMR4007 AS A STAND ALONE SENSOR Introduction The HMR4007 can be used as a stand-alone sensor without the need for any digital communications. The board is configured at the factory to provide a 0-2.5 VDC analog output (axial magnet) and status signal that represents the position of the magnet along the long axis of the device.
DDL calls are supplied to support these basic functions. Connector J1 General Description J1 is a 6-pin header which is wired to a PC parallel port for digital communications with the Honeywell demonstration DLL software (or other user application) using the following connections: PC (parallel port)
MAGNET CONSIDERATIONS The choice of magnet to be used with the HMR4007 is critical to its accuracy. Because a magnet's field extends beyond the boundaries of the material, a magnet has two dimensions to consider: its physical (material) length and its apparent (magnetic) length.