Skov DA 74BC Manual

2017.01.31 • 604150
DA 74BC Winch Motor
Technical User Guide
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2Technical User Guide
DA 74BC Winch Motor
Product and Documentation Changes
SKOV A/S reserve the right to change this document and the product herein described without further notice.
In case of doubt, please contact SKOV A/S.
Date of change appears from the front and back of this manual.
Note
•All rights reserved SKOV A/S. No part of this manual may be reproduced in any manner
whatsoever without the express written permission from SKOV A/S.
•SKOV A/S has made all reasonable efforts 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 notified thereof.
•Irrespective of the above, 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 2017 by SKOV A/S.

Technical User Guide 3
DA 74BC Winch Motor
1PRODUCT DESCRIPTION...............................................................................4
2GENERAL INFORMATION ..............................................................................5
2.1 Recommended Tools............................................................................................... 5
2.2 Warnings and Symbols........................................................................................... 5
3MOUNTING GUIDE ..........................................................................................6
3.1 Mounting DA 74BC .................................................................................................. 6
3.1.1 Mounting the Cover ............................................................................................................7
3.1.2 Checking Manual Operation...............................................................................................7
3.1.3 Checking Adjustment .........................................................................................................7
3.1.4 Installation of adapter for swivel shutter...........................................................................7
4INSTALLATION GUIDE....................................................................................8
4.1 Electrical Connection.............................................................................................. 8
4.1.1 Cable Routing......................................................................................................................8
4.1.2 Connection and Circuit Diagram for DA 74BC..................................................................8
4.1.2.1 Connection in DA 74BC ON/OFF............................................................................................................8
4.1.2.2 Circuit Diagram for DA 74BC ON/OFF....................................................................................................9
4.1.2.3 Connection in DA 74BC Stepless ...........................................................................................................9
4.1.2.4 Circuit Diagram for DA 74BC Stepless .................................................................................................10
4.1.3 Setting the Jumper............................................................................................................11
4.1.4 Testing the Electrical Installation ....................................................................................11
4.1.5 Calibrating the End Stop ..................................................................................................11
5MAINTENANCE GUIDE .................................................................................12
5.1 Cleaning...................................................................................................................12
5.1.1 Annual Inspection.............................................................................................................12
5.2 Dismantling for Recycling/Disposal......................................................................12
5.2.1 LED Indication...................................................................................................................12
5.3 Troubleshooting/Remedy.......................................................................................13
6TECHNICAL DATA.........................................................................................14
6.1 Dimensioned Sketch (mm).....................................................................................14
6.2 Pull Length and Force............................................................................................15

4 Technical User Guide
DA 74BC Winch Motor
1 Product Description
DA 74BC is a 24V winch motor with a wall fitting and an arm which is used to adjust wall inlets, ceiling inlets
or emergency opening of windows and doors in houses.
DA 74BC can be mounted for either ON/OFF or stepless regulation and is controlled by a house computer. The
winch motor can be operated manually by disconnecting power, activating the push button for the manual
release and turning the wall fitting arm.
Before activating the manual release, you must retain the wall fitting arm.
DA 74BC can be set to ON/OFF, stepless, ON/OFF reverse or stepless reverse using the jumper on the PCB.
DA 74BC is controlled by 24V DC, ensuring safe emergency opening in case of a power failure or other
failure.
DA 74BC is easy to clean thanks to its compact design.
Figure 1: DA 74BC
Position
Article no.
Winch motor DA 74BC
1
527272
DA 74 cover incl. quarterturn screws
2
301074
Relay cable 0.75 mm 2x300 + 1x80
3
Retaining disc
4
Locking screw
5
432950
Gear unit complete (green)
6
290074
PCB
7
Connection terminals on PCB
8
432952
Motor
9
Push rod manual release
10
310323
Mounting clip for DIN rail, black
11
344174
Label for DA 74 terminal block 12p
12
310000
Terminal block 12P 4 mm2
13
310237
Phase busbar cobber 3p 10mm-spacing
14
432090
DA 74 wall fitting for wire pull
1
14
2
4
5
6
9
8
7
10
11
13
3
12

Technical User Guide 5
DA 74BC Winch Motor
2 General information
2.1 Recommended Tools
The following or similar tools are required to service the DA 74BC. The tools are not supplied by SKOV A/S.
Item
Description
Multimeter
Screwdriver set
Side cutting pliers
Long-nose pliers
Knife
Water pump pliers
Cordless drill
Drill bits, various sizes
Adjustable spanner
Ladder
Table 1: The most necessary tools for servicing the DA 74BC..
2.2 Warnings and Symbols
This manual uses the following symbols:
Warns of general dangers

6 Technical User Guide
DA 74BC Winch Motor
3 Mounting Guide
Check that all parts are present and undamaged before mounting the DA 74BC winch motor.
3.1 Mounting DA 74BC
Mount the wall fitting (A) on the wall. Screws and
rawlplugs (B) are included. They may, however, be
inadequate, depending on the wall material.
Figure 2: Wall fitting
Turn the pull arm (C) so that the wide groove (D) in the
plastic shaft fits in with the slot (E) in the toothed rim of the
gear unit.
Figure 3: Toothed rim
Push DA 74BC into the wall fitting.
Mount the retaining disc (F) and locking screw (G).
Figure 4: DA 74BC
(A)
(B)
(E)
(C)
(D)
(F)
(G)

Technical User Guide 7
DA 74BC Winch Motor
3.1.1 Mounting the Cover
Mount the cover by turning the six quarterturn screws, Figure 5 (A).
3.1.2 Checking Manual Operation
Check the manual release when the cover has been mounted. Press
the push button, (B) and check by turning the pull arm. Hold on to
the arm before activating the release.
Figure 5: Manual operation
3.1.3 Checking Adjustment
Mount the mechanical connection between the winch motor and the inlet, window, door, and the like to be
adjusted.
Check that:
1) The inlet, window, door, and the like can open/close completely.
If not, readjust the mechanical connection and check again.
3.1.4 Installation of adapter for swivel shutter
Using the DA 74 adapter for swivel shutter, the DA 74BC winch motor can be mounted on an axle diameter
from 15–20 mm. The DA 74 adapter is ordered separately.
Figure 6: DA 74 adapter for swivel
shutter
Mount the axle in the shackle and tighten the two nuts.
Torque should be between 15–20 Nm.
Before the axle and winch motor are connected, both must be in the same position (open/open or
closed/closed).
(B)
(A)

8 Technical User Guide
DA 74BC Winch Motor
4 Installation Guide
4.1 Electrical Connection
Qualified personnel in accordance with the applicable national and international standard EN
60204-1 and any other EU standards that are applicable in Europe must perform installation,
service and fault finding of al electrical equipment.
The installation of a supply isolator is required for each motor and power supply, so
maintenance of electrical equipment can be carried out in a dead environment. Supply isolator is
not supplied by SKOV A/S.
4.1.1 Cable Routing
All cables must be mounted in M25 glands, protection class minimum IP65. Cables are to be secured in the
usual way outside the cabinet. Close holes which are not used with IP65 safety plugs.
Correct
Incorrect
Figure 7: Cable routing
4.1.2 Connection and Circuit Diagram for DA 74BC
4.1.2.1 Connection in DA 74BC ON/OFF
ON/OFF
Control voltage +24V => Close.
Control voltage 0V => Open.
Feedback signal > 0.5V => O.C. turns ON.
Feedback signal > 1.8V (15 degree opening) => relay turns ON.
Figure 8: Connection ON/OFF
H1
H2
H3
H6
H7
H8
H9
H
H10a
11a
+
CALIBRATE
24V
ON/OFF
0V
24V
12a

Technical User Guide 9
DA 74BC Winch Motor
4.1.2.2 Circuit Diagram for DA 74BC ON/OFF
Figure 9: Circuit diagram ON/OFF
4.1.2.3 Connection in DA 74BC Stepless
STEPLESS
Control voltage +24V/0V => Open. 0V/24V => Close.
Feedback signal > 0.5V => O.C. turns ON.
Feedback signal > 9.2V (85 degree opening) => relay turns ON.
Figure 10: Connection stepless
H1
H2
H3
H6
H7
H8
H9
H
H10a
11a
+
CALIBRATE
0V
0-10V
24V
+/-24V
+/-24V
12a
Example of terminal number.
For correct connection, see the setup
menu
Show Installation in Computer
Supply from emergency
opening or internal 24 V
Q1
F6
Q2-Q5
When installing DOL 278 ON/OFF
emergency opening, connection of the
H6 is not necessary

10 Technical User Guide
DA 74BC Winch Motor
4.1.2.4 Circuit Diagram for DA 74BC Stepless
Figure 11: Circuit diagram stepless
Example of terminal number.
For correct connection, see the
setup menu
Show Installation in
Computer
Supply from emergency
opening or internal 24 V
Q1
F6
Q2-Q5
When using ON/OFF 278M and 378M,
connect Q1 to C17/B17 on the main module.

Technical User Guide 11
DA 74BC Winch Motor
4.1.3 Setting the Jumper
The jumper on the PCB can be set to give the DA 74BC the required function.
Figure 12: Jumper setting
O.C. = Open Collector (transistor outlet)
REVERSE = Reverses the direction of rotation of the motor.
ON/OFF
Control voltage +24V => Close.
Control voltage 0V => Open.
Feedback signal > 0.5V => O.C. turns ON.
Feedback signal > 1.8V (15 degree opening) => relay turns ON.
STEPLESS
Control voltage +24V/0V => Open. 0V/24V => Close.
Feedback signal > 0.5V => O.C. turns ON.
Feedback signal > 9.2V (85 degree opening) => relay turns ON.
ON/OFF REVERSE
Control voltage +24V => Close.
The feedback signal increases together with the opening degree 0.25V= closed=90°.
Feedback signal > 0.5V => O.C. turns ON.
Feedback signal > 1.8V (15 degree opening) => relay turns ON.
STEPLESS REVERSE
Control voltage +24V/0V => Open. 0V/24V => Close.
Feedback signal > 0.5V => O.C. turns ON.
Feedback signal > 9.2V (85 degree opening) => relay turns ON.
4.1.4 Testing the Electrical Installation
1) See jumper setting, section 4.3.
2) Activate the house computer to transmit a closing signal.
•Check closed state and adjust the mechanical connection, if necessary.
3) Activate the house computer to transmit an opening signal.
•Check closed state and adjust the mechanical connection, if necessary.
4.1.5 Calibrating the End Stop
It is not necessary to calibrate using the CALIBRATE button on the PCB, unless the PCB, solenoid or gear has
been replaced.
Calibration must be carried out before connecting the mechanical connection, otherwise the mechanical
connection must be fine adjusted again.
90º
0º 90º
0º
REVERSE

12 Technical User Guide
DA 74BC Winch Motor
5 Maintenance Guide
DA 74BC does not require any special maintenance, however, we recommend that the system be serviced once
a year.
5.1 Cleaning
Clean the product with water and a brush without using:
high-pressure cleaner
solvents
corrosive/caustic agents
Figure 13: Cleaning
5.1.1 Annual Inspection
1) Open the cabinet cover to check the inside functions; check also that no fluid can penetrate into the
cabinet as this may damage gears and other components. Pay attention to the shaft sealing and the
sealing of cable lead-throughs.
2) Activate the manual release and check that the swivel shutter moves unobstructedly in its entire
working range.
5.2 Dismantling for Recycling/Disposal
SKOV A/S' products which are suited for recycling are marked with a pictogram showing
a refuse bin that is crossed over. See picture.
Customers can dispose of SKOV A/S products at local collecting points/recycling stations according to local
directions. The recycling station will then send the products to an approved plant for recycling and reuse.
5.2.1 LED Indication
OK = slow flashing (1 flash/sec.)
Calibration = constantly on
Fault = fast flashing (10 flashes/sec.)
Figure 14: LED
(A)

Technical User Guide 13
DA 74BC Winch Motor
5.3 Troubleshooting/Remedy
Even though the DA 74BC has been designed to work without supervision, malfunctioning may occur.
Check the following to remedy any faults.
Symptom
Cause
Solution
The winch motor does not
run, the LED does not
flash at all.
No power supply or is the power supply
below 12V?
Check supply voltage.
Check fuses.
Check assembly according to the
connection and circuit diagram.
Has the motor plug been mounted?
Mount the plug.
Has calibration been forgotten?
Press the CALIBRATE button; the
LED must be constantly on while the
winch motor opens and closes.
The LED (A) flashes
quickly 10 times/second.
The motor stutters.
Remove any object which may have
been trapped.
Has the solenoid been mounted?
Mount the solenoid.
Inlet, window or door not
completely open/closed.
Adjust the mechanical connection.
No feedback signal from
the house computer.
When using ON/OFF 278M and 378M,
connect Q1 to C17/B17 on the main
module.
Table 2: Troubleshooting/remedy

14 Technical User Guide
DA 74BC Winch Motor
6 Technical Data
Electricity
Technical data DA 74BC
Power supply
24V DC 20%
Power consumption max.
0.15A
O.C. (open collector) output max.
20mA - 30V DC
Relay output max.
6.8A at 230V
Mechanics
Running time, no load
70 secs.
Running time, max. load
120 secs.
Max. torque
24Nm
Cable knock-out pieces
6 Ø25.5mm for M25 cable gland
Environment
Ambient temperature
-10°C to +45°C
Warehouse temperature
-25°C to +60°C
Cabinet insulation class
IP 65
Shipment
Dimensions (H x W x D)
142 x 330 x 97mm
Packing dimensions (H x W x D)
315 x 415 x 175mm
Shipping weight
3,200g
Table 3: Technical data
6.1 Dimensioned Sketch (mm)
Figure 15: Dimensioned sketch

Technical User Guide 15
DA 74BC Winch Motor
6.2 Pull Length and Force
The measurements are from the centre of the wall fitting arm.
Arm length
[mm]
Max. pull force
[kg]
Pull length
[mm]
392
6.2
532
357
6.8
483
322
7.6
439
290
8.4
395
176
13.9
251
154
15.9
209
Figure 16: Pull and force

SKOV A/S • Hedelund 4 • Glyngøre • DK-7870 Roslev
Tel. [phone] • Fax [phone] • www.skov.com • E-mail: [e-mail]
2017.01.31 • 604150 • 8.02.03 • EN • Made in Denmark