HMR4007

SENSOR PRODUCTS

APPLICATION NOTES

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. All power and signals are available on connector J2.

Connector J2 General Description

When used in a stand-along mode, only connector J2 needs to be used. Connector J2 is a 4-pin socket header that is used to supply power (pin 1), ground (pin 4), analog position (pin 3), and status (pin 2). When power is supplied to the board though J2, a jumper must be placed on pins 2-5 (center pair) in jumper block JP2. The power supply can be regulated 5VDC or unregulated 6-28VDC. If connector J2 is used in combination with the communications port, only ONE of the ports should be used to supply power to the board.

Analog Outputs

The analog output (J2, pin 3) represents the position of the magnet along the long axis of the sensor board as seen in Figure 2 below. In the given example, the center of the magnet lies between sensors 3 and 4. The resulting output voltage is 1.20 volts which corresponds to a position of 33.4 mm.

N

S

position (mm)

69 .6

33 .4 m m

34 .8

 

1

.20 vdc

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

0

1 .2 5

2 .5 0

 

 

O utput (volts,

D C )

Figure 2. Position sensing example.

An effort should be made to keep the angle of the magnet with respect to the sensor board reasonably constant along the length of travel. The sensor, however, is quite tolerant to changes in distance (gap) between the sensor and magnet along the length of travel.

Status Pin

Pin 2 (on port J2) is a TTL logic-level status output bit. This pin will be logic high (+5VDC) whenever the position output is valid. Logic level low (ground) indicates that the sensor cannot calculate a magnet position. The most likely causes of a position error signal are:

1.The magnet is beyond the sensed range of the device.

2.The magnet is too short or too weak for the sensors to track.

3.The gap between the sensor and magnet is too large.

4.The magnet is not present.

Solid State Electronics Center • www.magneticsensors.com • (800) 323-8295 • Page 6

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Honeywell manual Application Notes, Using the HMR4007 AS a Stand Alone Sensor
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HMR4007 specifications

The Honeywell HMR4007 is an advanced sensor designed for precision measurement in various industrial applications. This device is celebrated for its robust performance and reliability, making it a favored choice among engineers and system designers.

One of the main features of the HMR4007 is its high accuracy in measuring humidity and temperature, providing precise readings essential for maintaining optimal conditions in controlled environments. The sensor operates effectively across a wide temperature range, ensuring versatility for multiple applications. It is designed with a patented sensor technology that enhances its ability to withstand harsh conditions while maintaining accuracy.

In addition to high precision, the HMR4007 boasts a rapid response time, allowing it to quickly adapt to changes in the environment. This responsiveness is crucial in applications requiring real-time monitoring and control, such as in HVAC systems and environmental monitoring.

The device also integrates seamlessly with various communication protocols. This feature enables easy integration into existing systems and enhances its adaptability in different setups. Users can use standard interfaces for simple installation and maintenance, which reduces downtime and enhances operational efficiency.

Another significant characteristic of the Honeywell HMR4007 is its durability. Constructed with high-quality materials, the sensor is built to withstand the rigors of industrial environments, making it a reliable choice for long-term applications. Its rugged design ensures longevity, reducing the need for frequent replacements.

The sensor's compact size makes it suitable for applications with limited space, while its lightweight design ensures easy installation. Furthermore, the HMR4007 is designed for low power consumption, making it cost-effective in the long run.

In summary, the Honeywell HMR4007 stands out due to its high accuracy, rapid response time, flexible communication options, and robust durability. These features make it an ideal sensor for a variety of industries looking to maintain precise environmental conditions. Its advanced technology and reliability ensure that it meets the demanding needs of modern industrial applications, positioning it as a valuable tool for professionals in the field.
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