SICK WTT12-S Instrucciones De Funcionamiento página 26

OPERATING INSTRUCTIONS
7.3 Notes on UL approval
en
8 Commissioning
8.1 Alignment
8.2 Adjustment
26 O P E R A T I N G I N S T R U C T I O N S | WTT12-S
L+ = Voltage supply
Q = Digital output
M = Ground
D = Diagnostics/test
n. c. = Not connected
Procedure
1. Connect the electrical connections.
2. Apply and switch on the voltage supply (U
✓
The green LED on the sensor lights up.
The device shall be supplied from an isolating transformer having a secondary overcur‐
rent protective device that complies with UL 248 to be installed in the field rated either:
a) max 5 amps for voltages 0 ~ 20 V (0 ~ 28.3 V peak), or
b) 100 / Vp for voltages of 20 ~ 30 V (28.3 ~ 42.4 V peak).
Alternatively, they can be supplied from a Class 2 power supply.
UL Environmental Rating: Enclosure type 1
Procedure
Align the sensor according to the project planning requirements.
►
Prerequisites
• Sensor is correctly mounted and aligned.
• Sensor has a clear view of the reference surface.
• Normal operation is active. No teach-in is possible in test mode.
Procedure
NOTICE Do not operate the teach-in button using sharp objects.
1. Press the teach-in button for 10 seconds.
✓
The distance between the sensor and reference surface L
✓
The two thresholds L
1
LEDs during teach-in
The yellow LEDs behave as follows during teach-in (both displays always switch synchro‐
nously):
• As soon as the teach-in button is pressed, the LED switches off
• If teach-in is successful, the LED indicates the output state of the sensor
> 0 V).
V
and L are derived from the taught-in distance L
3
2 1
5
3
4
is taught in.
2
.
2
8029123/2024/01/15 | SICK
Subject to change without notice