Bühler technologies VSA24-Sx Notice De Montage page 5

VSA24-Sx -Dx
4.2 Electrical connections
The capacity sensor VSA 24 is powered with 24 V direct cur-
rent. The sensor connects with a cable and standard M12 plug-
in connectors. The following image shows the terminal as-
signment: The switching voltage of the outputs is max. 1 A at
24 VDC.
+24 V DC ± 10%
Output 1
Output 2
GND
Temp.
5 Operation and control
After switching on the device, the green LEDs blink during
warm-up. Once the oil has a temperature of 30 °C (86 °F), the
green LEDs will stay on and the sensor is ready for use.
As the filter element becomes more contaminated, the dy-
namic pressure or pressure drop over the filter slowly in-
creases. If the remaining capacity is only approx. 25 % or the
pressure reaches a specific value, an alarm is triggered. The
yellow LEDs will light up and alarm output 1 will be active.
If the capacity of the filter element is depleted, the red LEDs
will also light up and in addition to alarm output 1, alarm out-
put 2 will also be activated.
To trigger a switching operation, the respective pressure must
be overrun for at least 4 s. This prevents false alarms caused
by brief pressure peaks.
The status of the capacity sensor remains unchanged, even if
oil is no longer flowing through the filter. The status will not
be reset until the sensor has been switched off, e.g. when
switching off the system to change the filter element. Altern-
atively, press the Reset button.
BX130002 ◦ 08/2020
Output 1 = alert at
approx. 75% filter
contamination
(NO contact with
rising dynamic pres-
sure or pressure
drop)
Output 2 = shut-off
at 100% filter con-
tamination
(NC contact with
rising dynamic pres-
sure or pressure
drop)
Reset button
LED
Green LED
blinks about
twice per second
Green LED
steady
Yellow LED
steady
Red LED
steady
Red LED
blinks about
twice per second
6 Maintenance
Always observe the applicable safety- and operating regula-
tions when performing any type of maintenance. Please refer
to the original operator's manual on the included CD or online
at www.buehler-technologies.com for maintenance informa-
tion.
7 Service and Repair
Please refer to the original operator's manual on the included
CD or online at www.buehler-technologies.com for a detailed
description of the unit including information on
troubleshooting and repair.
Status
Warm-up, oil temperature
<30 °C (86 °F)
VSA 24 ready for use
Alert filter element almost de-
pleted, alarm output 1 active
Filter element depleted, alarm
output 2 active
Error, see chapter 5
Bühler Technologies GmbH 5