DOL 20SCR Manual
Technical User Guide
2www.dol-sensors.com DOL 20SCR
1 Product description
DOL 20SCR is a capacitive sensor for detection of loose and solid materials.
The sensor has a 2-wire connection (ON or OFF), which is protected against higher current (Ie) than specified,
incl. connection / short-circuit directly to supply voltage.
The product is suitable together with contactors, relays and similar within the agricultural and industrial sectors.
The mechanical design makes DOL 20SCRideal for integration into applications with limited space.
2 Mounting guide
Measurement through plastic material:
The sensor with mounting clip can be used for plastic types with
a minimum of moisture absorption.
Fit the sensor so that it is protected from the build-up of dust and
the impact of water on the detection area of the sensor, including
condensation.
If there is significant wear, the sensor should be mounted behind
a wear plate made of a suitable plastic material.
The sensor is not side sensitive, but to avoid incorrect detection
as a result of uncertainty with regard to mounting, it is best to
keep the sensor away from any metal components, see the di-
mensions in figure
(5 mm gap).
3 Installation guide
Installation, servicing and troubleshooting of all electrical equipment must be carried out by quali-
fied personnel in compliance with the applicable national and international standard EN 60204-1
and any other EU standards that are applicable in Europe.
The sensor must be connected as per the diagram
LED indication Sensor status
LED OFF Sensor is OFF
LED flashing Sensor is OFF and ON delay is active
LED ON Sensor is ON
If the max. current (Ie) is exceeded, the sensor will try to change from OFF to ON 6 times, at the same time as
quick pairwiseYellow LED flashes occur.
Technical User Guide
DOL 20SCR www.dol-sensors.com 3
4 User Guide
When there is material in front of the sensor, the output is in the reference position OFF. When the material dis-
appears, the timer, starts, and the output will change to ONafter the set delay.
The status of the sensor is indicated with a yellow LED.
The sensor sensitivity and delayed disconnection can be adjusted on two trimmers.
ON OFF
Sensor
LED
Contact
ON
ON
OFF
OFF
Delayed disconnection:
fixed delay or delay can be adjusted on the trimmer.
Delayed connection:
fixed delay or delay can be adjusted on the trimmer.
Sensitivity:
fixed distance or Distance can be adjusted on the trimmer.
MaxRun-timer:
DOL 20SCR Settings on the trimmer: Off, Period 1, Period 2
5 Maintenance
If the sensor is located in a particularly dirty environment, it may be necessary to clean the area around the
sensor.
Otherwise, no additional maintenance is required.
6 Technical data
Electrical
Rated voltage (Ue) V AC
V DC
20 - 280
20 - 280
Frequency Hz 47 - 63
Max. current (Ie) mA 500
Direct connection to Ue (current >>
500 mA) without damage to the
sensor
Times > 10
Min. ON current (Im) mA RMS/DC < 10 (Ue = 20 - 90)
mA RMS/DC < 6 (Ue = 90 - 280)
OFF current (Ir) mA RMS/DC < 3 (Ue = 20 - 90)
mA RMS/DC < 1 (Ue = 90 - 280)
Voltage drop (Out) (current > 20
mA)
mA
RMS/V DC
< 6
Time delay, start-up ms < 150
Time delay, ON* ms < 200
Time delay, OFF* (adjustable) s 0.1 - 600
Technical User Guide
dol-sensors a/s – Agro Food Park 15 – DK-8200 Aarhus N – T: +45 7217 5888 – F: +45 7217 5959 – www.dol-sensors.com
Operating distance (Sn)* mm
in
0 - 12
0 - 0.47
Safe activation distance (Sa) mm
in
4 - 10
0.16 - 0.39
Repeatability (R) % 5
Hysteresis (H) % 4 - 10
MaxRunTimer* (3 settings) s OFF / Period 1 / Period 2
LED indicator for sensor ON Yellow LED
Mechanical
Cable length m (ft.) 1.5 (4.9)
Cable dimensions mm² (AWG) 2x0.5 (2x20)
Frame for mounting sensor Included
Environment
Temperature, operation °C (°F) -20 - +70 (-4 - 158)
Temperature, operation, US and
Canada, Ie < 300 mA
°C (°F) -20 - +70 (-4 - 158)
Temperature, storage °C (°F) -40 - +80 (-40 - 176)
Protection class IP (NEMA) 69k (1, 3, 4, 6, 12, 13)
Approvals CE, C-UL, UL
*Option – can be changed / introduced upon request. See the current functions on the product label.
6.1 Dimensions
604129 • 2022-08-17 • en-US • Made in Denmark
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