Product catalogue
Controls and
Sensors
GKN Stromag Light Cam®/ Light Cam®M
Geared Cam Limit Switches
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Catalogue No. D 143
This catalogue for limit switches series Light Cam® cancels and re-places all former editions.
We reserve the right to modify the dimensions and constructions.
GKN Stromag products comply with the Quality Standard to DIN ISO 9001.
cONTENT
Geared Cam Limit Switches Light Cam® and Light Cam® M
General
4
Construction of the Geared Cam Limit Switches
4
Ordering example
5
Table 1:
Gear for contacts 99 and 99 P with cam disc 40° ∅50
6
Table 2:
THREE-PHASE AC CURRENT
7
Cam Disc, Type, Protection, Approvals
8
Dimensional figure pedestal execution Light Cam®
9
Dimensional figure flange execution Light Cam®
10
Dimensional figure pedestal execution Light Cam® M
11
Dimensional figure flange execution Light Cam® M
12
Options and special excecutions
13
Geared Cam Limit Switch Light Cam® / Light Cam® M
General >
GKN Stromag Light Cam® series geared cam limit switches are universal mechanical switching devices
which present a large number of input shaft revolutions on the rotation angle of one single revolution of
the cam discs.
The cam discs serve to operate the contacts. GKN Stromag Light Cam® series geared cam limit switches
are used wherever specific ranges of travel can be limited indirectly only by switching devices.
Classical applications of these limit switches are lifting, travelling and slewing gears of cranes, wind
power stations, bucket elevators, etc.
Especially where a danger to persons exists and the use of positive opening switching contacts is required according to EN 60947, part 5 − 1, IEC 947 − 5 − 1, the use of geared cam limit switches is the most
efficient alternative.
Benefits include
> Combined worm/spur gears for high gear reductions requiring less mounting space; different,
precisely graduated gear reduction
> Cam discs with precise adjustment
> Utilisation of switching contacts for switching voltages of 250 VAC, gold contacts on request
> Available with
4 contacts = 1 contact group
8 contacts = 2 contact groups
> Utilisation of potentiometers is possible with gear intermediate speeds or with cam disc speed
omitting one contact assy.
Construction of the geared cam limit switch >
3
4
2
1
1 Gear housing
EKM-0225
2 Drive shaft
3 First contact cam group; contacts 1 to 4
4 Second contact cam group; contacts 5 to 8
4
Ordering example 260_LC/LCM_499_FV >
260_
LC/LCM_
4
99_
F V_
G/P
Nominal revolution (s. table 1)
Switch type
LC: Light Cam with plastic housing (PBT)
LCM: Light Cam® with aluminium housing (AL)
®
Number of contacts fitted
Type of contacts fitted
(see table 2)
Precise adjustment
Additional designations
G: With Encoder/Sensor
P: With potentiometer
Series
Light Cam®/Light Cam® M
Type
260_LC/LCM_499_FV
Numbers of usable revolutions
e.g. 135
s. table 1
Numbers of contacts
e.g. 4
Available with 4 or 8 change over
contacts as well as 3 NC/NC or NC/NO
alternativley contacts
Type of contacts
e.g. 99
s. contact table 2
Construction
Foot mounted
Protection
IP 65/IP 66
Light Cam® IP 65 / Light Cam® M IP 66
5
Geared Cam Limit Switch Light Cam® / Light Cam® M
max. drive
torque for
positive opening
of a single
contact [Nm]
min. drive
speed in
changeover
mode [rpm]
min. drive torque for
switching a single
contact [Nm]
contact
99
max. drive speed [rpm]
mech.
hysteresis
Coasting revolutions of
drive shaft to each side
Nominal revolutions
Effective revolution with
40° cam disc
Table 1: Gears for contacts 99 and 99 P with cam disc 40° ∅50 >
0,85
0,89
0,111
0,003
contact
80, 88, 90,
90G
0,017
200
0,049
0,212
0,042
0,424
0,20
0,493
1,85
1,88
0,235
0,006
0,037
200
0,103
0,449
0,090
0,899
0,20
0,338
0,891
2,25
2,27
0,283
0,008
0,044
200
0,125
0,541
0,108
1,082
0,20
0,315
0,774
contact
99
contact
90, 90G
contact
88
contact
80
contact
99
contact
80, 88, 90,
90G
1,663
2,8
2,85
0,356
0,010
0,055
200
0,156
0,680
0,136
1,359
0,20
0,292
0,657
3,3
3,36
0,420
0,011
0,065
200
0,185
0,802
0,160
1,605
0,20
0,278
0,587
3,4
3,37
0,421
0,011
0,065
200
0,185
0,804
0,161
1,608
0,20
0,277
0,586
3,9
3,99
0,498
0,013
0,077
200
0,219
0,952
0,190
1,903
0,20
0,265
0,526
6
6,03
0,753
0,020
0,117
200
0,331
1,439
0,288
2,878
0,20
0,243
0,416
7
7,11
0,889
0,024
0,138
200
0,391
1,698
0,340
3,395
0,20
0,237
0,383
7,7
7,82
0,978
0,026
0,152
200
0,430
1,867
0,373
3,735
0,20
0,233
0,366
9
9,11
1,139
0,031
0,177
200
0,501
2,176
0,435
4,352
0,20
0,229
0,343
10,5
10,67
1,333
0,036
0,207
200
0,586
2,546
0,509
5,093
0,20
0,224
0,322
13
13,33
1,667
0,045
0,259
200
0,733
3,183
0,637
6,366
0,20
0,220
0,298
15
15,11
1,888
0,051
0,294
200
0,830
3,606
0,721
7,212
0,20
0,217
0,286
25
26,38
3,297
0,089
0,513
200
1,449
6,297
1,259
12,593
0,20
0,210
0,249
29
29,80
3,725
0,101
0,579
600
1,638
7,115
1,423
14,230
0,20
0,209
0,244
53
53,33
6,667
0,180
1,037
600
2,931
12,732
2,546
25,465
0,20
0,205
0,224
76
76,00
9,500
0,257
1,477
600
4,176
18,144
3,629
36,287
0,20
0,203
0,217
87,5
87,63
10,954
0,296
1,703
600
4,816
20,921
4,184
41,842
0,20
0,203
0,215
95
95,44
11,930
0,322
1,855
600
5,244
22,784
4,557
45,569
0,20
0,203
0,214
103
103,70
12,963
0,350
2,016
600
5,699
24,757
4,951
49,515
0,20
0,203
0,213
135
136,00
17,000
0,459
2,644
600
7,473
32,468
6,494
64,935
0,20
0,202
0,210
147
147,78
18,472
0,499
2,872
600
8,121
35,279
7,056
70,559
0,20
0,202
0,209
178
178,35
22,294
0,602
3,467
600
9,801
42,579
8,516
85,158
0,20
0,201
0,207
180
185,58
23,197
0,626
3,607
600
10,198
44,303
8,861
88,606
0,20
0,201
0,207
240
243,37
30,421
0,821
4,730
600
13,373
58,100
11,620
116,200
0,20
0,201
0,205
260
264,44
33,056
0,893
5,140
600
14,532
63,131
12,626
126,263
0,20
0,201
0,205
305
305,62
38,202
1,031
5,940
600
16,794
72,960
14,592
145,920
0,20
0,201
0,204
360
361,66
45,208
1,221
7,030
600
19,874
86,340
17,268
172,681
0,20
0,201
0,204
435
435,50
54,438
1,470
8,465
600
23,931
103,968
20,794
207,937
0,20
0,201
0,203
515
515,37
64,421
1,739
10,017
600
28,320
123,035
24,607
246,070
0,20
0,201
0,203
620
620,59
77,574
2,094
12,063
600
34,102
148,155
29,631
296,310
0,20
0,200
0,202
880
884,34
110,543
2,985
17,189
600
48,596
211,121
42,224
422,241
0,20
0,200
0,201
1320
1326,51
165,813
4,477
25,784
600
72,893
316,680
63,336
633,360
0,20
0,200
0,201
ELECTRICAL PARAMETERS AND POSITION OF SWITCHING CONTACTS >
A)
3
80 1
90
90G
B) 1
81 3
4
2
3
4
1
C) 11
21
88
2
4
1
2
2
3
12
22
4
A 80/90/90G: Circuit changeover contact change with isolated contact
bridges
B 81: Circuit changeover contact button with isolated contact bridges
11
21
12
C 88: Circuit double NC contact change with osilated contact bridges
1, 2, 3, 4, 11, 12, 21, 22: Connecting points
22
EKM-0113
6
80
81
•
•
•
6A gR
3A
3A
Temperature
Operating temperature
Life circle
Mechanical endurance
Ui Rated insulation voltage
Short-circuit protection
Ith Continuous thermal
current
Radio switching capacity
according to
EN 60947-5-1 AC-12
Switching capacity
connected load according
to EN 60947-5-1 AC-15
Positive opening2)
Push action switch
•
•
Elektrical data
Function
Control system
•
Snap-action switch
Gold (PLC application)
Contact
material
•
Silver
Circuit as NC contact
Circuit as changeover
contact
Designation
Switching
contacts
Table 2, THREE-PHASE AC CURRENT >
10x106
-40°C –
+85°C
1,5x106
-55°C –
+85°C
6A gR
230V1)
88
•
90
•
90G
•
99
•
99P
•
99G
•
99L
•
•
•
•
•
99T
•
99A
•
99B
•
99C
•
•
A)
3
80 1
90•
90G
1)
Values with ohmic load
2)
EN 60947-5-1
•
•
•
4
2
•
•
•
•
C) 11
21
88
•
•
1
•
•
10A
•
12
22
21
10A gG
10A gG
1
2
3
4
2A gR
•
11
•
4
2
2
4
2A gR
0,25A 230V1)
•
•
•
B) 1
6A gG
81 3
•
3
400V
10A gG
1A
10A gG
1,5A
•
•
•
1,5A
230V
10x106
250V
•
12
•
22
10A gG
2A gR
•
•
2A gR
•
•
10A gG
Kontaktdaten für Gleichstrom auf Anfrage
A Circuit changeover
contact
B Circuit NC contact/
button
C-F Position of contact
connections
C Screw connection
D Tab connector
E Solder pins
F Wire exit
(1 = black,
2 = white, 4 = grey)
7
-40°C –
+85°C
EKM-0113
Geared Cam Limit Switch Light Cam® / Light Cam® M
Cam discs
The cam discs are provided with 40 contact cams as standard. On request cam discs with any other
cam angle can be provided at extra charge. Special cam discs are already made in our works as per the
customer’s specification.
When not stating the cam angle on order placement, cam discs with a cam angle of 40 will be fitted.
For special cam discs with a firm program please provide a diagram similar to the below shown example
drawing.
Production angle
Example drawing
Effective
cam angle
Contact
(Switching
point angle)
0
0
Roller lever of switching contact
ng
tchi
Swi
poi
dius
nt ra
15
60
270
1
2
1
315
Cam angle
15
60
270
315
360
360
2
3
3
4
4
The usable number of revolutions of the drive shaft of a geared switch enabled by a cam disc can be calculated
as follows:
(360° - α (effective cam angle) x i (gear reduction of switch))
360°
Construction
As a standard the GKN Stromag Light Cam® series geared cam limit switches are always supplied in
pedestal execution. Housing and feet form one piece; the feet cannot be removed.
As an option a flange can be screwed to the input side of the geared cam limit switch. The supplement
FL80 or FL85 is added to the type designation.
Generally the fixing bores are provided for the two flange executions. They can be used optionally.
The assembly dimensions are stated on the dimensional drawing (fixing pitch circle 96 or 100 mm is
possible).
Protection
The housing has protection IP 65 Light Cam® (IP 66 Light Cam® M) to DIN VDE 0470 − 1 / EN 60529. To
improve the protection against water penetration, the cap is equipped with a protruding dropping edge,
which also covers the sealing.
Approvals
CE, cUL, CSA, CCC
Technical data
Gear ratios from 1,0:1 to 1:1320
Up to 3 NC/NC or NC/NO or up to 8 change
over switching contacts
7
Incremental and absolute encoder assembly possible in- and outside
Easy and quick adjustment of cams
High Protection:
Light Cam®: IP 65
Light Cam® M: IP 66
8
Datum / Date 09. 2006
4,2 12 deep
View A
predetermined breaking point
for gland M20x1,5
thread length 15 mm
predetermined breaking point
for gland M20x1,5 thread length 9 mm
4,2 12 deep
Dimensional figure pedestal execution Light Cam® >
9
View A
predetermined breaking point
for gland M20x1,5
thread length 15mm
predetermined breaking point
for gland M20x1,5 thread length 9mm
4,2 12 deep
Geared Cam Limit Switch Light Cam® / Light Cam® M
Dimensional figure flange execution Light Cam® >
10
Erdanschluß
M5 M5
Earth
connection
Option:
Kabelverschraubung
10-14mm_6-12mm_5-9mm
Cable
gland M20x1,5M20x1,5
10-14mm_6-12mm_5-9mm
tief
deep
Blindstopfen
Stopping
plug M20x1,5
Ansicht
View
A A
Ansicht
View
A A
tief
deep
tief
deep
Dimensional figure pedestal execution Light Cam® M >
11
Earth connection M5
Option:
Cable gland M20x1,5 10-14mm_6-12mm_5-9mm
Stopping plug M20x1,5
View A
View A
deep
deep
Geared Cam Limit Switch Light Cam® / Light Cam® M
Dimensional figure flange execution Light Cam® M >
12
Options and special executions >
1. Mounting of incremental encoders
Instead of a contact block, the incremental encoder can be mounted. The input speed for the encoder complies with
the speed of the input shaft of the geared switch. The encoder is connected through a printed circuit board with
terminals. It is absolutely necessary to connect the encoder by screened cables.
For further details please inquire a complete data sheet.
Further increments on request.
Poti or Encoder on actuating >
11
The Poti/Encoder (1) can be included in place of a
second cam disc group.
For mounting sensors available from GKN Stromag,
separate mounting instructions are supplied. GKN
Stromag must be consulted before mounting other
types of sensors.
GKN Stromag provides separate mounting
instructions for these sensors after being consulted.
EKM-0226
13
Geared Cam Limit Switch Light Cam® / Light Cam® M
absolute encoder ON DRIVE SHAFT (via multi-turn GEAR STAGE) >
The sensor (1) can be included in place of a second
cam disc group.
For mounting sensors available from GKN Stromag,
separate mounting instructions will be supplied.
1
1
GKN Stromag must be consulted before mounting
other types of sensors.
GKN Stromag provides separate mounting
instructions for these sensors after being consulted.
EKM-0227
Absolute encoder (multi-turn) through drive shaft >
For mounting sensors available from GKN Stromag,
separate mounting instructions are supplied.
GKN Stromag must be consulted before mounting
other types of sensors.
GKN Stromag provides separate mounting
instructions for these sensors after being consulted.
1
EKM-0228
14
special executions >
Various options for drive flanges
Different types of gears with respect to modulus
Customer-specific shaft adaptations
and number of teeth
15
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Ipsley House
Ipsley Church Lane
Redditch
Worcestershire B98 0TL
P: +44 (0)1527 517 715
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GKN Stromag AG
The GKN Stromag AG
is a company of GKN Land Systems
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