Manual and assembly instructions
Replacing RSU90 limit switch unit
RW241 Motor Gearboxes 1-phase\230V\50Hz
Ridder Drive Systems
Lorentzstraat 36-38 䡩 3846 AX Harderwijk
P.O. Box 360 䡩 3840 AJ Harderwijk
The Netherlands
T +31 (0)341 416 854 䡩 F +31 (0)341 416 611
E [email protected] 䡩 I www.ridder.com
265097EN - V01 - 201012
Contents
Scope of RW-RSU manual and assembly instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings contained in the manual and assembly instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Conditions for internal switching on the power supply of RW241 motor gearboxes . . . . . . . . . . . . 3
General warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Wiring diagram symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
RW241 motor gearbox wiring diagram: 230V\50Hz\1~\RC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
RSU limit switch system replacement instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Adjusting the RSU limit switch system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Rotational directions of RW241 motor gearboxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Scope of RW-RSU manual and assembly instructions
The manual and assembly instructions contain important information for installers for replacing and
operating the RSU limit switch unit of the Ridder 1-phase RW241 motor gearbox. Please read the
manual and instructions before replacing the RSU limit switch unit. All work must be carried out by
qualified and licensed mechanical and/or electrical installers under safe and responsible conditions.
Warnings contained in the manual and assembly instructions
This manual contains tips, observations and warnings of various types and degrees. Below is a list
and description of the meaning of a tip, observation or warning.
TIP
A suggestion or advice in respect of carrying out an operation.
WARNING
Remarks and extra information regarding potential problems
arising when an operation is carried out incorrectly.
CAUTION
The product or system may become damaged
when an operation is carried out incorrectly.
DANGER
The user or installer could suffer physical and/or life-threatening
injury when an operation is carried out incorrectly.
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Conditions for internal switching on the power supply of RW241 motor gearboxes
The RSU limit switch system of a Ridder 1-phase RW241 motor gearbox
can be used to switch on the power supply of the 1-phase electric motor,
provided the following conditions are met:
r RSU limit switch unit 501102 (230, 1-phase, >60mA);
r 1-phase, 220-230V power supply;
r Maximum 1.2A motor current;
r RC circuits are applied with the RSU working switches (250V, 0.033mF0.1mF, 100W);
r The neutral conductor (N) of the power supply must be connected via the
safety switches of the RSU limit switch unit.
Failure to meet the conditions for switching on
the power supply of the RSU limit switch system
may cause system damage and/or
create hazardous situations.
DANGER
General warnings
DANGER
Disconnect the power supply before performing (maintenance)
work on the RW241 motor gearbox or the driven system.
CAUTION
Parallel connecting of 2 or more RW motor gearboxes
with 1-phase electric motors is not allowed!
CAUTION
Wait two seconds after operating a RW motor gearbox
before driving it in the opposite direction.
Wiring diagram symbols
Symbol
EM
ES11, ES12
ES21, ES22
K11, K21
L1, N, PE
Q11
RC
Description
Electric motor
RSU limit switch system duty switches
RSU limit switch system safety switches
Reverse switching relay
Phase, Neutral, Earth
Motor safety switch
RC circuit
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RW241 motor gearbox wiring diagram: 230V\50Hz\1~\RC
Before switching on the power supply of the RW241 motor gearbox of the RSU limit switch system,
check that the wiring is connected according to the following wiring diagram. The RC circuits must be
connected to the contacts of the duty switches of the RSU limit switch system (as shown in the RSU
box). Cables may not be connected to the RSU limit switch system as shown in the RSU , RSU
and RSU boxes.
PE
N L1
Q11
K22
EM
K21
RSU
PE
1
RC
PE W1 U1
12
V1
10
11
9
RC
7
8
6
4
5
3
1
2
L2
M
1~
L1
ES22
C
ES12
ES21
ES11
B
A
PE
RSU
PE
RSU
N
2
N
3
12
11
10
9
ES22
8
7
ES12
B
6
5
4
3
ES21
2
1
12
ES11
10
9
ES22
䡩
8
7
ES12
B
A
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6
5
4
3
ES21
2
RSU
PE
4
12
1
11
10
9
ES22
ES11
8
7
ES12
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4
3
ES21
2
1
ES11
A
B
A
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RSU limit switch system replacement instructions
These instructions describe how to replace the RSU limit switch system of the RW241 motor gearbox
and how to connect the RSU limit switch system for switching on the power supply of the 1-phase
electric motor of the RW241 motor gearbox.
1
Switch off the power supply before replacing
the RSU limit switch system of a Ridder RW
motor gearbox!
DANGER
The following tools are required for replacing the RSU
limit switch system:
2
- Screwdriver
- Star screwdriver
- Side cutter pliers
The following replacement set is required for replacing
the RSU limit switch system:
- 501107 RSU90-230\1\>60mA\RC SET
3
This set includes a manual, an RSU limit switch system,
two RC circuits and a connection wire.
4
The RSU limit switch system is located under the
limit switch cover of the RW241 motor gearbox (white
border).
5
Take the limit switch cover off the RW241 motor
gearbox by removing the 4 screws holding it in place.
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Position the new RSU limit switch system near the RSU
limit switch system to be replaced.
6
U1
W1
N
L2
L1
V1
RSU
RC
12
11
10
9
8
W1
1
RC
7
6
5
4
L2
3
2
V1
1
Now transfer the wiring from the first RSU
limit switch system to the new one. Connect
the wiring to the RSU as shown in the RSU diagram.
L1
RSU
2
12
11
0
10
9
8
7
6
5
4
3
2
1
If the wiring is initially connected as shown in
the RSU or RSU diagrams, make wiring
connections as shown in the RSU diagram.
7
W1
L2 V1
L1
RSU
RS
3
12
11
10
0
U1
9
8
W1
7
6
5
4
N
L2
3
2
1
L1
V1
RSU
RS
4
12
11
0
10
9
8
7
6
5
4
3
2
1
If, however, wiring is initially connected as
shown in the RSU diagram, you will not
need to change anything.
Depending on the connection situation, follow
the instructions provided in 7A for RSU ,
instructions in 7B for RSU , and instructions
7C for RSU .
Transfer and connect the wiring as follows:
RSU
7A
2
rL1 from 1 to 1 (existing RSU to new RSU);
rL2 from 7 to 7;
rV1 from 3 to 3 (or W1 from 3 to 3, depending on
direction of rotation of electric motor);
rW1 from 9 to 9 (or V1 from 9 to 9);
rConnect N to clamp 4 (new RSU);
rConnect U1 to clamp 12;
rConnect jumper wire (supplied) to clamps 6 and 10.
RSU
1
Proceed to step 8.
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Transfer and connect the wiring as follows:
RSU
7B
3
rL1 from 1 to 1 (existing RSU to new RSU);
rL2 from 7 to 7;
rV1 from 6 to 3 (or W1 from 6 to 3, depending on
direction of rotation of electric motor);
rW1 from 12 to 9 (or V1 from 12 to 9);
rConnect N to clamp 4 (new RSU);
rConnect U1 to clamp 12;
rConnect jumper wire (supplied) to clamps 6 and 10.
r(Wires between 3-4 and 9-10 are not used)
RSU
1
Proceed to step 8.
Transfer and connect the wiring as follows:
RSU
7C
4
rL1 from 1 to 1 (existing RSU to new RSU);
rL2 from 7 to 7;
rV1 from 3 to 3 (or W1 from 3 to 3, depending on
direction of rotation of electric motor);
rW1 from 9 to 9 (or V1 from 9 to 9);
rN from 4 to 4;
rU1 from 12 to 12;
rConnect jumper wire (supplied) to clamps 6 and 10.
RSU
1
Proceed to step 8.
Remove the existing RSU switch system by loosening
the two fastening screws (screws are located under the
opening at the top of the RSU switch system).
8
CAUTION
Mount the new, wired RSU limit switch system on the
RW motor gearbox.
Attention! When mounting the limit switch system,
make sure that the long set screws of the limit switch
system do not touch the switch spring arms of
microswitches and the RSU limit switch system.
9
Now secure the RSU limit switch to the gear housing
by tightening the screws.
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12 mm
10
After connecting and installing the new RSU limit
switch system, connect the RC circuits. But first cut
the connecting wires of the RC circuits down to about
12 mm.
11
Mount the first RC circuit on the clamping strip of the
RSU limit switch system on clamps 1 and 3.
12
Mount the second RC circuit on the clamping strip of
the RSU limit switch system on clamps 7 and 9.
Replacement of the RSU limit switch system is now
complete.
13
Check that the RSU limit switch system is functioning
properly by driving the RW motor gearboxes in both
end positions.
WARNING
To readjust the limit switch system, follow the
instructions for “Adjusting the RSU limit switch
system”.
Mount the limit switch cover of the RW241 motor
gearbox and tighten the 4 screws that hold it in place.
14
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Adjusting the RSU limit switch system
ES11
B
ES21
A
a
12 11 10
6
b
A
B
A
4 2 3
9
8
7
6
5
4
3
2
1
b
a
C
NC
NO
C
NC
NO
C
NC
NO
C
NC
NO
7
7
3 2 4
1
6
B
ES22
ES12
ES21
ES11
ES12
ES22
RSU limit switch system installation
The following describes the steps for adjusting the RSU limit switch system of the RW motor gearbox.
Current and voltage range
The contacts in the switches for the Ridder RSU limit switch system can be connected to the following
currents:
r 24V-AC, currents 60 mA to 130 mA;
r 230V, current to 1.2 A.
Ridder RSU limit switch system
The Ridder RSU limit switch system is a linear switch system, specifically designed for use in RW
motor gearboxes. The limit switch system is driven by the output shaft of the motor gearbox via a
secondary transmission. The number of revolutions of the output shaft can be set between a starting
and ending position. The maximum range equates to 86 revolutions of the output shaft.
Delivery
The RSU limit switch system will not have been adjusted on delivery. The adjusting rings (3) can
be moved freely round the milled nuts (2). This means that the range of the drive in both rotational
directions is not limited and also prevents a switch system failure due to outside operation.
How it works
The main shaft of the motor gearbox drives the wire shaft (1) of the RSU limit switch system via a
secondary transmission. When running, the switch followers (4) will move along the threaded shaft
as it rotates. The friction between the threaded shaft and the switch follower pushes the setscrew (a)
lightly against one of the two switch springs (which one it will be depends on the direction of rotation).
When a switch follower reaches the end of the threaded shaft, it will change its linear motion and rotate
with the threaded shaft. The setscrew (a) then pushes against the switch spring, causing it to deflect
and trip a duty switch (ES11 or ES12). This in turn causes a signal that activates the relay, stopping
the motor gearbox. Should a relay or duty switch fail, then a safety switch (ES21 or ES22) will also be
tripped by the switch spring. This causes a signal that activates a safety relay, stopping the controller
and also thereby the motor gearbox. This prevents consequential damage to the system.
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Connection
When connecting the Ridder RSU limit switch system, please refer to the wiring diagrams provided for
this purpose.
Setting
The end positions are set as follows:
r Rotate the main shaft of the motor gear box system to bring the system to the end position
(completely open or completely closed) and determine which duty switch (ES11 or ES12) should be
tripped.
r The milled nut (2) can easily be screwed by hand along the threaded shaft (1). The switch follower
(4) also moves along the threaded shaft. Turn the milled nut on the appropriate side, “hand tight” up
to the stop (7).
r Now rotate the adjusting ring (3) over the milled nut just far enough to trip the duty switch.
r Then fasten the adjusting ring with setscrews (a and b) firmly on the milled nut. The adjusting ring
can no longer be rotated over the milled nut.
Repeat the previous steps to adjust the limit switch system for the opposite direction of rotation.
WARNING
Always check the operation of the limit switch system
after setting the two end positions!
CAUTION
Always prevent overrunning of the adjusted limits when operating
the motor gearbox manually (with hexagon in the electric motor).
This will damage the limit switch system!
Rotational directions of RW241 motor gearbox
B
A
A
B
A
B
A
B
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