CL 75A 24V User´s guide Bedienerhan

CL 75A 24V User´s guide Bedienerhandbuch mit Montageanleitung


Code Nr. 99 97 0853
M 853 GB + D







Nr.: 603691
Versionsnr.: 1.0





























Big Dutchman International GmbH . Calveslage . Auf der Lage 2 . 49377 Vechta
04447/801-0 . Fax 04447/801-237

CL 75A 24V Winch motors Page 2





1. PRODUCT DESCRIPTION ............................................................................................................................................ 3

Fig. 1 Operation ............................................................................................................................................................ 3

2. MAINTENANCE ............................................................................................................................................................. 3

3. ELECTRIC INSTALLATION ........................................................................................................................................ 3

3.1 NORMAL CONTINUOUSLY VARIABLE FUNCTION ............................................................................................................. 4
Fig. 2 “Stepless” block diagram and connection ................................................................................ ........................... 4
3.2 ON/OFF EMERGENCY OPENING FUNCTION ................................................................................................................... 5
Fig. 3 “ON/OFF-Emergency opening” block diagram and connection .......................................................................... 5

4. ASSEMBLY ..................................................................................................................................................................... 6

5. TROUBLE SHOOTING AND EMERGENCY OPERATION ...................................................................................... 8

Fig. 5 Motorprint and Noise Capacitor .......................................................................................... ................................ 8
Fig. 6 Mounting of Switch Wire ................................................................................................................................... 9

6. SPARE PARTS AND ACCESSORIES.......................................................................................................................... 10

7. TECHNICAL DATA...................................................................................................................................................... 10














































User´s guide CL 75A 24V
Edition: 27.05.98  M 853 GB

CL 75A 24V Winch motors Page 3



1. Product Description
CL 75A is a winch motor designed to control shutters and inlets, e.g. in livestock ventilation systems. CL 75A has 2 wires which permit independent adjustment of pulling length and pulling direction. CL 75A is equipped with a feedback potentiometer for position indication.
There is a switch to select between AUT and MAN (B). The winch motor is relay controlled and can be infi- nitely variable controlled between open and closed position. In the automatic position the motor is controlled by the climate computer, e.g. MC 34H. In the manual position the motor can be opened manually, stopped or closed with the switch (C). CL 75A has built-in limit switches and a thermal contact to switch off the motor if it gets too hot. Under emergency conditions CL 75A can be operated by means of emergency opening crank, item No. 432020, or a battery-operated drilling machine and enclosed coupling piece (D) through the hole (A).
CL 75A for 24V is designed particularly for systems with emergency opening, where the energy reserve is a 24V battery.
Also possible is ON/OFF-emergency opening, e.g. the winch motor opens a window completely.





























Fig. 1 Operation

2. Maintenance

Check regularly that the wires are O.K. and not worn in the wire tracks.
The motor carbon has a life of approx. 5,000 operating hours, corresponding to approx. 10 years of nor- mal operation. If required a new carbon brush can be ordered with SKOV, see section 6 “Spare Parts and Accessories”.


3. Electric Installation

CL 75A is connected to the automatic unit by a seven-core cable (Fig. 2) or five-core cable (Fig. 3).
After installation set the switch (B) to MAN, and run the motor from stop to stop via the switch (C) in order to make sure that the mechanical coupling is O.K. Set the switch (B) to AUT and check that the motor is able to open, stop and close via the automatic unit. The opening and closing directions are labeled on the wire wheel.




User´s guide CL 75A 24V
Edition: 27.05.98  M 853 GB

CL 75A 24V Winch motors Page 4


3.1 Normal Continuously Variable Function

Set the AUT./MAN. - switch (B) at AUT. The motor will be controlled on cable 1 and 3.

If the CL 75A is supplied with 24V DC on the wires 1(= +24V) and 3(= 0V) the motor will open. Re- versed polarity closes the motor. Wire no. 2 is not used when operated continuously variable.

Equal polarity on wire 1 and 3 causes a stop. If wire no. 1, wire no. 3 or both are switched off, the motor will stop. Wire no. 4 (= +24V DC) and 5(= 0V) must always be connected constantly so that the motor can open/close manually with the switches (B) and (C).

To the potentiometer is connected for example 10V DC to wire no. 6 (= +10V) and wire no. 8 (= 0V). Wire no. 7 will then have 0V when motor is closed, approx. 5V when motor is half open and approx. 10V when motor is fully opened.

When operating automatically, set the switch (B) at position AUT.

In case of power failure the motor can be adjusted by means of the enclosed coupling (D) and emergency opening crank or a drilling machine, preferably battery operated. The plug (A) is also screwed off with the coupling.





































Fig. 2 “Stepless” block diagram and connection











User´s guide CL 75A 24V
Edition: 27.05.98  M 853 GB

CL 75A 24V Winch motors Page 5



3.2 ON/OFF Emergency Opening Function

Set the AUT./MAN. switch (B) at AUT.

This function is used for emergency opening of a window in a house with “diffuse” air outlet. As an exam- ple the motor may be controlled by a DOL 2012 thermostat or a mechanical Danfoss thermostat + MC
78M emergency opening unit.

The motor is controlled ON/OFF (open/close on wire 2 with only one single relay make contact). When the temperature gets too high, the relay switch of the thermostat should switch off +24V for wire 2 and the motor opens fully.

As long as wire 2 has +24V the motor is kept completely closed.
Wire 1(=+24V) and 3(=0V) must always be connected in this application.
Wire 4(= +24V DC) and 5(= 0V) must always be connected to enable the motor to open and close manu- ally with the switches (B) and (C).




































Fig. 3 “ON/OFF-Emergency opening” block diagram and connection


Cable length Cross section

 30 m 1.5 mm²

20  50 m 2.5 mm²


Conductor cross section




User´s guide CL 75A 24V
Edition: 27.05.98  M 853 GB

CL 75A 24V Winch motors Page 6



4. Assembly
CL 75A is delivered with 2 wires discs and corresponding wire. If only one wire is to be used, dismount the ut- termost. In order to use the same bolts again, mount the wire discs again.

If 3 wires should be used, an extra wire disc with wire, item No. 432925, can be re-mounted. The same bolts can be used.

CL 75A should be mounted vertically or horizontally on the wall. At horizontal mounting the shaft should turn down in order to avoid water penetration. In countries with a hot climate it should be avoided that the sun shines directly on CL 75A. 3 or 4 pcs. of 10 mm through-bolts should be used to secure the unit. Above the unit, (A) on Fig. 1, sufficient space should be left free for an emergency opening crank or a battery-operated drilling ma- chine to operate the motor, should emergency opening be required. The wires can be led in any direction, also through the wall. The wires should be wound on to the wire wheel in order to obtain the correct pulling or slacking length.

When you are going to wind a winch motor, it should always be in the fully closed position. Fig. 4 shows where to measure to get rough values in the scheme. Please note that min. 3 mm should be free to the outer periphery and the hub should always be “covered” by a wire winding as shown in the figure. The figure also shows the defi- nition of “number of wire windings = 1”.


Following table shows the rough relation between load, the number of wire windings and the pulling or slacking lengths.


1000 N equal 98 kg.





Fig. 4






































User´s guide CL 75A 24V
Edition: 27.05.98  M 853 GB

CL 75A 24V Winch motors Page 7



CL 75A-1
Measure to One-way pull Balanced

No. of wire windings

Pulling length
[mm]

Slacking leng.
[mm]

periphery before pull/sla.

Tractive force
[N]

Moment
[Nm]

Tractive force
[N]

Moment
[Nm]

1 237 - 48 1794 56 2384 75
2 260 232 45 1748 60 2170 75
3 284 256 42 1702 64 1992 75
4 307 279 39 1656 68 1840 75
5 331 303 36 1610 71 1710 75
6 354 326 33 1564 74 1597 75
7 377 349 30 1498 75 1498 75
8 401 373 27 1411 75 1411 75
9 424 396 24 1379 75 1333 75
10 447 419 21 1333 75 1263 75
11 471 443 17 1263 75 1201 75
12 494 466 14 1201 75 1144 75
13 517 489 11 1144 75 1092 75
14 541 - 8 1092 75 1045 75
CL 75A-3
1 502 - 48 1767 59 2251 75
2 549 - 45 1721 63 2059 75
3 596 484 42 1674 66 1898 75
4 642 530 39 1628 69 1760 75
5 689 577 36 1582 72 1640 75
6 736 624 33 1536 75 1536 75
7 783 670 30 1445 75 1445 75
8 829 717 27 1379 75 1363 75
9 876 764 24 1363 75 1290 75
10 923 811 21 1290 75 1225 75
11 969 857 17 1225 75 1166 75
12 1016 904 14 1166 75 1112 75
13 1063 951 11 1112 75 1064 75
14 - - 8 1064 75 1019 75
CL 75A-6
1 1117 - 48 1711 64 2025