Datasheet

Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Reflex ultrasonic sensor UBR400-F77-E2-V31
3
Release date: 2012-04-11 15:28 Date of issue: 2012-04-11 233246_eng.xml
Description of Sensor Function
The ultrasonic sensor works like a retroreflective sensor. It transmits ultrasonic packages in quick succession and responds to their reflection
off a reference object at a defined distance. The distance T to the reference object can be taught in. The sensor has a switch output. This output
switches if the reference object is not detected, which happens when another object is located between the sensor and the reference object.
The limit of the switching range is derived as follows: T - 5 %.
Notes
- The distance T of the reference object must not be changed during operation. If the distance T changes, it will have to be taught-in again.
- The reference object must not be removed during operation.
Teach-In the Distance to the Reference Object
Proceed as follows to teach in the distance T to the reference object:
1. Connect the sensor and turn on the operating voltage.
2. Place the reference object at the required distance.
3. Connect the teach-in input (ET) to -U
B
. This can be done using the pushbutton or the controller.
The LED will start flashing after 3 seconds to indicate that the sensor is ready to start the teach-in process
(*)
.
4. Disconnect the teach-in input (ET) with -U
B
. The distance T to the reference object has now been taught in
(*)
.
(*) If no object is detected within the sensing range of the sensor, the sensor will start flashing at a faster rate. The switching point remains
unchanged.
Switching characteristics and display LED
" = Object position
Mounting instruction
If the sensor is operated at temperatures below 0 °C, use the supplied distance plate. Only use the two rearmost mounting holes (located op-
posite to the transducer) for mounting the sensor.
Safety Note
The use of this device in applications, where the safety of persons depends from the devices function, is not allowed!
Accessories
UB-PROG4-V31
Programming unit
OMH-ML7-01
Mounting bracket
V31-GM-2M-PVC
M8, 4-pin socket, PVC cable
V31-WM-2M-PVC
M8, 4-pin socket, PVC cable
Sensing range Output LED
Adjustment range
Switching area 5%
of
T
Reference
object
(position T)
-U
B
Off
" +U
B
On
" +U
B
On