Honeywell 942 Series Ultrasonic Distance Sensor

Indicators

The sensor features several indicators:

• SP1 (yellow/gelb/jaune): Switching output 1 / Schaltausgang 1 / Sortie à seuil 1
• UB (green/grün/vert): Power ON Anzeige / Alimentation
• UNDER RANGE (red/rot/rouge): Underrange output / URA Schaltausgang / Sortie saturation basse
• OVER (red/rot/rouge): Overrange output / ORA Schaltausgang / Sortie saturation haute (ORA)
• SP2 (yellow/gelb/jaune): Switching output 2 / Schaltausgang 2 / Sortie à seuil 2

Wiring / Anschluß / Raccordement

The document includes a detailed wiring diagram showing the connections between the sensor head, evaluation electronics, and power supply, as well as the pinout for the RS232 interface.

Pin Descriptions

The table below details the function of each pin on the sensor head and the lower row connections:

Output Behavior (ORA/URA)

• ORA (Overrange Output): Active when the target is too far (or too close with a negative slope), causing analog outputs to saturate at their maximum (10 V - 20 mA).
• URA (Underrange Output): Active when the target is too close (or too far with a negative slope), causing analog outputs to saturate at their minimum (0 V - 4 mA).

HLD Control Input

The HLD input can be used to pause measurement. Connecting HLD to GND suppresses sensor transmit and receive, latching the outputs to the last measured distance. This input must be connected to 0V during programming.

Synchronization

To prevent mutual interference between multiple sensors, synchronization is recommended by connecting the HLD/SYNC inputs of the sensors together. This ensures that all sensors transmit simultaneously.

Programming the Sensor via Software

Sensor parameters can be modified using the UDSprog software (Windows 95 minimum). The process involves installing the software, connecting the sensor to a serial COM port, and launching UDSprog. Key steps include:

1. Install the UDSprog software.
2. Connect the sensor to a free serial COM port (RxD, TxD, GND).
3. Launch UDSprog and confirm sensor type and COM port.
4. Ensure the HOLD input is not connected to ground before proceeding.
5. Click "Save" to transfer parameters. Remember to ground the control input (HOLD - pin 6).
6. If communication fails, check serial communication settings, COM port configuration, and wiring. Consider using "Initialize sensor" to reset factory settings.
7. The program reads parameters from the sensor's memory.

The software allows adjustment of analog output (offset, range, slope) and switching outputs (NO/NC, distance). Advanced options for internal parameters are available via the "Configuration" -> "Advanced Options" menu, but these should only be modified by experienced users.

Technical Specifications

The following table summarizes the technical specifications for various models:

Notes:

• (1) Actual detection range depends on the head used.
• (2) Only some models of heads have temperature compensation.
• (3) Whichever value is greater.

Warranty and Service

Honeywell warrants its manufactured goods to be free of defective materials and faulty workmanship. For warranty information, contact your local sales office. Honeywell provides application assistance through its literature and website. Customers are responsible for determining product suitability for their applications.

For sales and service, contact your local Honeywell sales office or visit www.honeywell.com/sensing or email info.sc@honeywell.com.

Contact Information

Various Honeywell offices worldwide are listed for sales and service, including locations in the USA, Canada, France, Germany, Brazil, and Singapore.