zws ultrasonic sensors

The miniature sensor housing

of the zws-15 has dimensions of 20 mm x 32 mm x 12 mm. The housing’s design and mounting is compatible with many optical sensors. This facilitates the conversion to ultrasonic sensors for critical applications.

For the zws sensor range

2 output versions and 6 detection ranges are available:

	1 switching output, optionally in pnp or npn circuitry
	1 analogue output 4–20 mA or 0–10 V

The Teach-in button

on the top facilitates the convenient setting of the sensor.

Two LEDs

in the sensor housing’s upper half indicate the switching output and respectively the analogue output states.

The temperature compensation of the analogue sensors

profits from a significant improvement. The sensors reach their operating point only 45 seconds after switching on operating voltage.

The zws sensors with switching output have three operating modes:

• Single switching point (Method A and B)
• Two-way reflective barrier
• Window mode

The operating mode single switching point (Method A)

is suitable for applications, in which the actual distance to the object is also the switching point. A typical application is level control, where the ultrasonic sensor detects the filling level vertically from above during the filling process. The taught switching point corresponds to the maximum filling level.

Teach-in of a switching point Method A and Method B

The operating mode single switching point +8 % (Method B)

is recommended by objects, which move into the detection area from the side. In this case the switching distance is set 8 % further than the actual measured distance to the object. This ensures a reliable switching distance even if the height of the objects varies slightly.

NEW! Twin mode or external synchronisation

If two switching zws sensors are operating too close to one another, twin mode can be selected to avoid mutual influences. This new feature is integrated in zws sensors from firmware V3.

Synchronisation of up to 50 zws sensors

If more than two zws sensors need to be synchronised, the accessory SyncBox2 can be used. The SyncBox2 generates a synchronisation signal output on pin 2. This permits up to 50 zws sensors to be autonomously synchronised.

The zws sensors with switching output have three operating modes:

• Single switching point (Method A and B)
• Two-way reflective barrier
• Window mode

Teach-in of a single switching point (Method A)

by positioning the object to be detected within the desired distance (1) to the sensor, pressing the button for approx. 3 seconds and then pressing it once more for approx. 1 second. Ready.

Teach-in of a switching point (Method A)

Teach-in of a single switching point +8 % (Method B)

by positioning the object to be detected within the desired distance (1) to the sensor, pressing the button for approx. 3 seconds and then pressing it once more for approx. 3 second. Ready.

Teach-in of a switching point +8 % (Method B)

Teach-in of a two-way reflective barrier

with a fixed reflector can be set up with the help of a permanently mounted reflector by mounting the zws sensor and the reflector, then pressing the button for approx. 3 seconds and then pressing it once more for approx. 10 seconds. Now, the two-way reflective barrier has been set.

Teach-in of a two-way reflective barrier

Set the analogue output

by initially positioning the object to be detected on the sensor-close window limit (1), pressing the button for approx. 3 seconds, shifting the object to the sensor-distant window limit (2) and pressing the button once more for approx. 1 second. Ready.

Teach-in of an analogue characteristic or of a window with two switching points

To set a window

with two detection points on a single switching output, the procedure is the same as setting the analogue.

NCC/NOC

and rising/falling analogue characteristic curve can also be set using the push-button.