DOL 31 Speed Controller
Technical User Guide
612061 • 2023-08-31
DOL 31 Speed Controller
Technical User Guide 3
Product and Documentation Changes
SKOV A/S reserves the right to change this document and the product herein described without further notice.
In case of doubt, please contact SKOV A/S.
The date of change appears from the front and back pages.
Note
• All rights belong to SKOV A/S. No part of this manual may be reproduced in any manner whatsoever without
the expressed written permission of SKOV A/S in each case.
• All reasonable efforts have been made to ensure the accuracy of the information contained in this manual.
Should any mistakes or imprecise information occur in spite of this, SKOV A/S would appreciate being noti-
fied thereof.
• Irrespective of the above, SKOV A/S shall not accept any liability with regard to loss or damage caused or
alleged to be caused by reliance on any information contained herein.
• Copyright by SKOV A/S.
DOL 31 Speed Controller
Technical User Guide
1 Product description ....................................................................................................................................... 6
1.1 DOL 31 Automatic – Master mode............................................................................................ 6
1.2 DOL 31 Automatic – Slave mode.............................................................................................. 7
1.3 DOL 31 manual control.............................................................................................................. 7
2 Product survey ............................................................................................................................................... 8
3 Mounting guide............................................................................................................................................... 9
3.1 Recommended tools.................................................................................................................. 9
3.2 Mounting of DOL 31 speed controller.................................................................................... 10
4 Installation guide.......................................................................................................................................... 11
4.1 Cabling...................................................................................................................................... 11
4.2 Dismantling the AUT-0-MAN switch in DOL 31 16 A ............................................................ 11
4.3 Connection in DOL 31 ............................................................................................................. 12
4.4 Cable plans and circuit diagrams........................................................................................... 13
4.4.1 General information about circuit diagrams ............................................................................... 13
4.4.2 Color code.................................................................................................................................. 13
4.4.3 Power supply isolator................................................................................................................. 13
4.4.4 Letter code ................................................................................................................................. 13
4.4.5 Cable plan controller DOL 31..................................................................................................... 14
4.4.6 Circuit diagram controller to DOL 31.......................................................................................... 14
4.4.7 Cable plan DOL 31 Master and Slave ....................................................................................... 15
4.4.8 Circuit diagram DOL 31 Master and Slave ................................................................................ 15
5 User guide..................................................................................................................................................... 16
5.1 Operation .................................................................................................................................. 16
5.2 Alarm lamp ............................................................................................................................... 16
5.3 Display ...................................................................................................................................... 16
5.4 AUT-0-MAN switch................................................................................................................... 16
5.5 Keyboard .................................................................................................................................. 17
5.6 Menu Survey............................................................................................................................. 17
6 Menu mode ................................................................................................................................................... 18
6.1 Automatic - Master mode ........................................................................................................ 18
6.1.1 Set temperature ......................................................................................................................... 18
6.2 Automatic Slave mode ............................................................................................................ 18
6.3 Manual mode ............................................................................................................................ 19
6.3.1 Set output................................................................................................................................... 19
6.4 Minimum regulation of AC output .......................................................................................... 19
6.5 Minimum regulation of AC output .......................................................................................... 20
7 Service menu ................................................................................................................................................ 21
7.1 Active Alarms ........................................................................................................................... 21
7.2 Set temperature alarm ............................................................................................................. 21
7.3 Set control temperature .......................................................................................................... 22
7.4 Set P band ................................................................................................................................ 22
7.5 Set mininmum analog DC output ........................................................................................... 23
7.6 Set maximum analog DC output............................................................................................. 23
7.7 Selecting temperature scale ................................................................................................... 23
7.8 Invert ......................................................................................................................................... 23
7.9 Turn off functions .................................................................................................................... 24
DOL 31 Speed Controller
7.9.1 Turn off....................................................................................................................................... 24
7.9.2 Set turn off limit .......................................................................................................................... 25
7.10 Contrast .................................................................................................................................... 25
7.11 Backlight................................................................................................................................... 25
7.12 Language .................................................................................................................................. 25
7.13 Version Information ................................................................................................................. 25
8 Settings ......................................................................................................................................................... 26
8.1 Factory settings ....................................................................................................................... 26
8.2 Functions in menu mode ........................................................................................................ 26
8.3 Table relating to DOL 12 temperature sensor control.......................................................... 27
9 Replacing Triac............................................................................................................................................. 28
10 Maintenance.................................................................................................................................................. 29
10.1 Cleaning.................................................................................................................................... 29
10.2 Recycling/Disposal .................................................................................................................. 29
11 Trouble shooting instructions .................................................................................................................... 30
12 Technical data .............................................................................................................................................. 31
Technical User Guide
DOL 31 Speed Controller
6 Technical User Guide
1 Product description
DOL 31 is a single-phase triac speed controller for e.g. regulation of fans, stand-alone heating units or light.
DOL 31 can with advantage be used in applications where a complete climate controller is not required.
DOL 31 can be set to three different modes of operation:
• Automatic - Master mode in which the DOL 31 output is controlled on the basis of the ambient temperature.
Each DOL 31 is supplied with one DOL 12 temperature sensor.
• Automatic - Slave mode in which the DOL 31 output is controlled by a 0-10 V input signal.
• Manual control in which the DOL 31 output is set manually by means of the keyboard on the front.
In addition, DOL 31 has an alarm relay (max. 24 V, 1A), and 1 control relay (max. 230 V, 12 A). The control re-
lay could for instance be used for turning a heat or cooling source on and off.
DOL 31 speed controller is available in a 6.8 A and a 16 A version.
1.1 DOL 31 Automatic – Master mode
Temperature-controlled by means of a DOL 12 temperature sensor.
Fan
Fan
DOL 12
Heating
Heating
DOL 12
Fan/Heating
DOL 12
Regulation of fans Regulation of heating Control of one or more DOL 31, ex-
tended capacity.
Fan
DOL 12
Regulation of fan
0-10 V or 10-0 V
DOL 31 Speed Controller
Technical User Guide 7
1.2 DOL 31 Automatic – Slave mode
Controlled by a 0-10 V input signal.
Controlled by a SKOV A/S controller Controlled by DOL 31
1.3 DOL 31 manual control
Fan
Light
Fan
Controlled manually with setting via the keyboard. Output can be
set to 0 to 100 %.
DOL 31 Speed Controller
8 Technical User Guide
2 Product survey
130171 DOL 31 speed controller 6.8 A
0-10 V input or DOL 12 input (1)
0-10 V output (1)
60-230 V output (1)
24 V output (1)
24 V alarm relay (1)
230 V control relay (1)
Supplied with:
1 DOL 12 temperature sensor, 3 plastic glands M25 and 3 plastic nuts M25.
130172 DOL 31 speed controller 16 A
0-10 V input or DOL 12 input (1)
0-10 V output (1)
60-230 V output (1)
24 V output (1)
24 V alarm relay (1)
230 V control relay (1)
Supplied with:
1 DOL 12 temperature sensor, 3 plastic glands M25 and 3 plastic nuts M25.
DOL 31 Speed Controller
Technical User Guide 9
3 Mounting guide
3.1 Recommended tools
Below follows a list of tools recommended for installation of the DOL 31.
Topic Description
Cordless drill
Drill kit
Hammer
Marker pen
Multimeter
Tape measure
Side cutter
Screwdriver
Spirit level
DOL 31 Speed Controller
10 Technical User Guide
3.2 Mounting of DOL 31 speed controller
1. Remove the front panel and the flat cable plug (A).
2. Knock out the required number of knock-out pieces (B) at the bottom of the cabinet and mount the plastic
glands.
3. Prick/drill holes for the 4 screws (C) in the bottom section of the cabinet.
4. Remember free space around the cabinet:
• 10 cm (D) on the right side for operation of the AUT–0–MAN (Auto/Manual) change-over switches.
• 27 cm (E) above the cabinet so that the front panel can be placed here during service.
• 10 cm (F) below the cabinet to enable air cooling.
5. Align the box horizontally. Hold the cabinet base against the wall and mark out the 4 screws.
6. Drill 4 8 mm holes.
7. Mount the cabinet using the enclosed wall dowels and screws.
8. Place one or more washer(s) under one of the cabinet feet if the wall is not level and the cabinet base
moves.
DOL 31 Speed Controller
Technical User Guide 11
4 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 installation of a power supply isolator is required for each motor and power supply to facilitate
voltage-free work on the electrical equipment. The power supply isolator is not included.
4.1 Cabling
Cables are led through plastic glands in the bottom section. It is recommended to use armored cable in loca-
tions where there is a risk of rodent attacks.
4.2 Dismantling the AUT-0-MAN switch in DOL 31 16 A
Disconnect the supply voltage.
Dismantle the AUT-0-MAN switch in order to gain access to the screw
terminals.
Turn the lock in the opposite direction of the arrow.
Set the switch to 0.
Dismantle the AUT-0-MAN switch by means of a screwdriver. Push the
switch housing to the left.
Lift out the switch.
Connect power supply in X13-X15.
Connect output in X16-X18.
Set the switch to 0.
Push the AUT-0-MAN switch to the right.
Turn the lock. The arrow indicates the direction.
DOL 31 Speed Controller
12 Technical User Guide
4.3 Connection in DOL 31
Terminal block
X1 0-10 V input signal from DOL 12; controller or another DOL 31.
X2 0 V
X3 0-10 V or 10-0 V output signal
X4 0 V
X5 +24 V DC output
X6 0 V
X7 Alarm relay NO
X8 Alarm relay COMMON
X9 Alarm relay NC
X10 Control relay NO
X11 Control relay COMMON
X12 Control relay NC
X13 Supply ground
X14 Supply, phase
X15 Supply, neutral
X16 Output, neutral
X17 Output, variable phase
X18 Output ground
X19 Ground to cooling plate
DOL 31 Speed Controller
Technical User Guide 13
4.4 Cable plans and circuit diagrams
4.4.1 General information about circuit diagrams
Symbols are in accordance with the IEC/EN 60617 standard.
The classification of the symbols ("letter codes") on the symbols is in accordance with the IEC/EN 81346-2 stan-
dard.
Reference designations are in accordance with IEC/EN 81346-1:2001 structuring principles and reference des-
ignations. This standard indicates structured methods for naming electrotechnical systems.
4.4.2 Color code
Letter Code Color Standard
BK Black
Color coding on wires are in accor-
dance with standard IEC 60757:
Letter codes to identify colors used
on drawings, diagrams, labelling,
etc.:
BN Brown
RD Red
OG Orange
YE Yellow
GN Green
BU Blue (incl. light blue)
VT Violet (purple red)
GY Grey (slate)
WH White
PK Pink
GD Gold
TQ Turquoise
SR Silver
GNYE Green-and-yellow
4.4.3 Power supply isolator
Power supply isolator
The installation of a power supply isolator is required for each motor and
motor control.
4.4.4 Letter code
The letter codes used in accordance with standard IEC/EN61346-2.
-F -K -M -Q -S -T -W
Protective equipment RCCB /
Initial fuse Protective motor
switch
Controller
Contactor
Fan
Motor
Power supply
isolator
Switch Motor con-
troller
Cable
DOL 31 Speed Controller
14 Technical User Guide
4.4.5 Cable plan controller DOL 31
4.4.6 Circuit diagram controller to DOL 31
31 6.8 A = 10 A fuse
31 16 A = 16 A fuse
DOL
DOL
DOL31
DOL 31 Speed Controller
Technical User Guide 15
4.4.7 Cable plan DOL 31 Master and Slave
4.4.8 Circuit diagram DOL 31 Master and Slave
31
DOL
31 16 A = 16 A fuse
DOL
DOL31 6.8 A = 10 A fuse
DOL31
From X3 on Master
From X4 on Master
To X1 on Slave
To X2 on Slave
DOL 31 Speed Controller
16 Technical User Guide
5 User guide
5.1 Operation
Alarm lamp
Keyboard
AUT-0-MAN switch
Display
5.2 Alarm lamp
The alarm lamp is on when:
DOL 12 temperature sensor is disconnected Low temperature alarm
Short-circuited DOL 12 temperature sensor High temperature alarm
5.3 Display
Automatic
Manual
5.4 AUT-0-MAN switch
AUT (I) Auto (DOL 31 runs in the current user mode).
0Service mode (outputs are dead).
MAN (II) 100 % (phase directly to output).
DOL 31 Speed Controller
Technical User Guide 17
5.5 Keyboard
Up, down, right, left keys
The arrow keys are used for navigation and changing of data and values.
< 0.5 sec. By pressing you change the value by one either a menu or data.
> 0.5 sec. Pressing quickly changes the value/the menu.
Return key
Return is used for:
Returning to previous level or function.
Data remains unchanged.
OK key
OK is used for:
Selecting function.
Confirming and saving data.
5.6 Menu Survey
24 C° 0% 100% Automatic / manual Service
Alarms 3 C° -8 C° 4 C° 5.7 V 10 V VER.
Language
60 %60 %
YES/NO
NO/YESC / F
Set temperature/output Set maximum analog output
Set minimum output Set temperature scale
Set maximum output Invert
Set mode Deactivating Functions
Service menu Contrast
Active Alarms Backlight
Set temperature alarm
Temperature alarm high
Language
Set P band Version Information
Set minimum analog output
DOL 31 Speed Controller
18 Technical User Guide
6 Menu mode
Set DOL 31 to the required mode. (Automatic Master/Slave and Manual).
6.1 Automatic - Master mode
It is controlled by a signal from the temperature sensor. DOL 31 automatically adjusts according to the set tem-
perature.
Set mode Automatic Master
6.1.1 Set temperature
Set required temperature. DOL 31 automatically adjusts according to the set temperature.
Set temperature 26 °C
6.2 Automatic Slave mode
DOL 31 is controlled by the controller or a master DOL 31. No setting of temperature.
Set mode Automatic Slave
DOL 31 Speed Controller
Technical User Guide 19
6.3 Manual mode
Manual control of output.
Set mode Manual
6.3.1 Set output
DOL 31 is manually controlled. Direct control of the output by pressing the up or down key. Output can be set to
0 to 100 %. Min. and max. output are left out of account.
NOTE: Please note that certain fans require a minimum voltage.
Set output 26 %
6.4 Minimum regulation of AC output
Setting minimum power on output. The setting is made as a percentage of the supply voltage. Control of the
output by pressing the up or down key. Min. setting (0-50 %) cannot exceed 50 %.
For use with e.g. heating control:
Set minimum output to 0%. DOL 31 will then turn off the output, if there is no need for adjustment.
For Automatic Slave mode, see section Set turn off limit [}25].
NOTE: Please note that certain fans require a minimum voltage.
Set minimum output 26 %
DOL 31 Speed Controller
20 Technical User Guide
6.5 Minimum regulation of AC output
Setting maximum power on output. The setting is made as a percentage of the supply voltage. Control of the
output by pressing the up or down key. Min. setting (50 - 100 %) cannot be set higher than 50 %.
Set maximum output 26 %
Example:
Set minimum output = 0 %
Triac output = 0 V
Set minimum output = 1 %
Triac output = 60 V
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