DOL 26SCR Manual
Technical User Guide
2www.dol-sensors.com DOL 26SCR PNP/NPN
1 Product description
DOL 26 is a capacitive sensor for detection of loose and solid materials.
SCR output versions are available in 2-wire versions.
PNP output versions are available in 4-wire versions.
The products are suitable together with contactors, relays, PLC’s and similar within the agricultural and indus-
trial sectors. DOL 26 is immune to EMI, short circuits and any overload. The mechanical design makes DOL 26
ideal for integration into applications with limited space. The full-return option is especially suited for feeding
pans. Very low power consumption in off state – enables possibility for sensors working in parallel on the same
contactor. Unique possibility for controlling cross auger systems.
2 Mounting guide
Smooth version mounted
within a PG 21 gland
Threaded version mounted with M18 nut. Mounting restrictions for non-flush (side sensi-
tive version)
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.
DOL 26SCR
DOL 26SCR:
Connect the sensor in series with the load. The polarity is unimportant.
The sensor is protected against overload and short circuit. If the output cur-
rent exceeds the nominal output current, the output function is switched off.
Remove the short circuit or choose a smaller load to remove the error. The
current limitation error is indicated on the sensor by double flashes followed
by a pause.
DOL 26PNP
DOL 26PNP/NPN:
Connect the sensor to a DC supply and connect the loads between the out-
puts and V- for the PNP version and V+ for the NPN version.
Technical User Guide
DOL 26SCR PNP/NPN www.dol-sensors.com 3
DOL 26NPN
The sensor is protected against polarity errors, and the outputs are pro-
tected against overload and short circuit. If the output current exceeds the
nominal output current, the output function is switched off. Remove the short
circuit or choose a smaller load to remove the error. The current limitation
error is indicated on the sensor by double flashes followed by a pause.
LED indication DOL 26 SCR status DOL 26 PNP/NPN status
RED OFF Sensor output is OFF
RED slow flashing Sensor delay is active
RED double flashing Sensor load error (overcurrent protection is active)
MaxRunTimer is active (optional)
RED ON Sensor output is ON
GREEN OFF - No power to sensor
GREEN ON - Power to sensor
Adjustment
DOL 26 has trimmers with different functions depending on its type for adjustment.
4 Technical data
DOL 26SCR DOL 26PNP/NPN
Electrical
Supply voltage (Ue)
V AC/DC 20 - 280 -
V DC - 10 - 36
Frequency Hz 47 - 63 -
Max. ripple % - 10
Max. Current mA AC/DC 500 -
mA DC - 500
Inrush current A ˂ 2,5A @ 30 ms -
Direct connection to Ue
(current >> 500 mA) with-
out damage to the sensor
times ˃10
Min. ON current mA AC/DC
RMS
< 10 (Ue = 20 - 90) -
< 6 (Ue = 90 - 280) -
OFF current mA AC/DC
RMS
< 3 (Ue = 20 - 90) -
< 1 (Ue = 90 - 280) -
Voltage drop, output ON V AC/DC ˂ 6 -
V DC - ˂ 2.5
current consumption with-
out load
mA DC - ˂ 6
Specifications
Detection speed Hz ˂ 15 ˂ 100
Time delay, start-up ms 265 60
Time delay, ON* s ˂ 0.065 - 600 ˂0,010 - 600
Time delay, OFF* (ad-
justable)
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
DOL 26SCR DOL 26PNP/NPN
Activation distance (Sn)*
(adjustable)
mm
(inches)
0 – 12 (0 – 0.47)
Safe activation distance mm
(inches)
4 – 10 (0.16 – 0.39)
Repeatability % 5
Hysteresis % 4 - 10
MaxRunTimer* (3 set-
tings)
s Off / Period 1 / Period 2
Number of single turn
240° potentiometer
0, 1 or 2
Number of outputs 1 1 or 2
Type of output NO or NC NO and NC
Indicator for power ON - Green LED
Indicator for sensor out-
put state ON or Error
Red LED
Mechanical
Sensor length mm
(inches)
89 (3 1/2)
Sensor diameter (d) mm
(inches)
18 (11/16)
Cable dimensions mm2
(AWG)
2x0.5 (2xAWG20) 4x0,26 (4xAWG22)
Cable length m(ft.) 2 (6.6)
Cable type UL2517
Weight incl. cable g (oz) 170 (6)
Environment
Operating temperature °C (°F) -20 to +70 (-4 to +158)
Operating temperature,
USA and Canada, le <
300mA
°C (°F) -20 to +70 (-4 to +158) -
Operating temperature,
USA and Canada, le <
500mA
°C (°F) -20 to +65 (-4 to +149) -20 to +70 (-4 to +158)
Storage temperature °C (°F) -40 to +80 (-40 to +176)
Protection class IP 69k (DIN 40050-9)
NEMA 1, 3, 4, 6, 12, 13
Approval CE, UL, C-UL
*Option – can be changed / introduced upon request. See the current functions on the product label.
604128 • 2022-08-22 • en-US • Made in Denmark
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