Interlocking safety switches SKT

Interlocking safety
switches
SKT
Protection class IP 65
q
Available are:
l 1 NC p/1 NO
l 1 NC p/1 NO
l 2 NC p
l 2 NC p
slow-action device
snap-action device
slow-action device
snap-action device
Positioning the actuator head
l Rotation in 4 x 90° increments: when
mounted, the head is fixed into position
by the clasp
l Horizontal or vertical operation
5.5
(0.22")
Mechanical data
l Enclosure and lid made from highly
durable fiberglass reinforced thermoplastic (UL 94-VO)
l Operating mechanism: head made from
PA, clasp from Zn, rivets from stainless
steel
l Actuator made from stainless steel
l Cable entry M 16 x 1.5
M4
M5
2
(0.08")
4
(0.16")
The SKT is the smallest safety switch with a
separate actuator offering the same features, relating to safety, as all other products in this range. The SKT is perfect for
applications that require a particularly slim
and compact switching device. The rotating
head, two actuator openings and different
switching functions are proof of its versatility.
The SKT offers further options enabling it
to suit a wide variety of applications.
l Integrated forced ejection function (FE):
The actuator is ejected from the switch:
– preventing unauthorized use of a spare
actuator to defeat the safety function
– ensuring the guard must be closed
securely to enable the machine to run
l Integrated actuator holding force
(FI50 = 50 N):
Guard doors which may open due to
vibration can be held shut by using the
SKT with increased actuator holding
force up to 50 N, without the need for
bulky external latches. In addition several
doors mounted in a straight line on one
machine are kept closed.
l Universal radius actuator (MRU):
In addition to the standard straight-on
actuator made from stainless steel (operating radius 150 mm), the universal
radius actuator offers an adjustable
operating radius to a minimum 50 mm
both horizontally and vertically.
The SKT offers a variety of different switching functions in a highly compact enclosure. All systems are fitted with galvanically
isolated contacts, the normally-closed
being positive break. Snap-action contacts
have been designed for control systems
that require a simultaneous signal.
22
(0.87")
23
(0.91")
Mounting and installation
l The safety switch is mounted using 2 x
M5 screws in the provided locating and
mounting holes (23 mm centres).
l The separate actuator is attached using
2 x M4 screws (20 mm centres).
The safety switch and the actuator should
be secured well, in order to prevent unintentional loosening (one-way and break-off
screws, rivets etc.)
Warning
l The safety switch must not be used
as a mechanical end stop.
l To preserve the level of safety, the safety
switch must only be used in conjunction
with the correct actuator.
Contact configuration
Switching element
Switch function
Switch contact
Designation
Voltage
Continuous current
Slow-action
Snap-action
Slow-action
Snap-action
changeover
changeover
normally-closed
normally-closed
1
1
2
2
U1Z
SU1Z
A2Z
SA2Z
250
250
250
250
10
10
10
10
64
NC/1 NO
NC/1 NO
NC
NC
V
V
V
V
A
A
A
A
Switches
Switch angle degree
Tol. ± 3.5°
SKT-A2Z M3
601.6469.066
11
13
11
12
21
22
23
p Zb
l/–
iw
14
21
24
22
p Zb
–/l
iw
21.5(0.85)
p Zb
l/–
iw
2)
2)
21.5(0.85)
2)
21.5(0.85)
11
12
21
p Zb
–/l
iw
22
11-12
21-22
11-12
21-22
12
SKT-SA2Z M3
601.6469.067
11-12
21-22
Actuating force N
Tol. ± 10%
SKT-SU1Z M3
601.6409.060
21-22
13-14
13-14
21-22
Contact travel mm
(inch)
Tol. ± 0.25 mm
SKT-U1Z M3
601.6419.059
11-12
23-24
Designation
Part number
Switching diagram
p positive break according to
IEC 947-5-1 Chap. 3
Za: changeover contact is not galvanically isolated
Zb: changeover contact is galvanically isolated
Slow-action contact/snap-action contact
Gasket inside (iw)/outside (w)
21.5(0.85)
2)
Actuating torque Ncm
Tol. ± 10%
) actuator in
) actuator out
1
6(0.24)
6(0.24)
4.4(0.17)
4.3(0.17)
4.5(0.18)
4.5(0.18)
3.7(0.15)
4(0.16)
4.5(0.18)
3.9(0.15)
4.2(0.17)
2
In
Out
0
mm(inch)
12-1)
N
12-1)
N
0
mm(inch)
0
0
12-1)
N
mm(inch)
12-1)
N
Voltage
max.
Continuous current
max.
Making current, acc. to IEC 947-5-1 AC 15/DC 13
250 V AC
10 A
l
250 V AC
10 A
l
250 V AC
10 A
l
250 V AC
10 A
l
Switching frequency
max.
Mech. operational life – number of switching cycles
Ambient temperature
min./max.
30/min.
1 x 106
–30 °C/+80 °C
–22 °F/+176 °F
30/min.
1 x 106
–30 °C/+80 °C
–22 °F/+176 °F
30/min.
1 x 106
–30 °C/+80 °C
–22 °F/+176 °F
30/min.
1 x 106
–30 °C/+80 °C
–22 °F/+176 °F
Approvals
BG, UL, CSA
BG, UL, CSA
BG, UL, CSA
BG, UL, CSA
Weight
Delivery: ex-stock/built to order
0.13 kg/0.29 lb
l/–
0.13 kg/0.29 lb
l/–
0.13 kg/0.29 lb
l/–
0.13 kg/0.29 lb
l/–
All dimensions in mm (inch)
6.5
(0.26")
R
(5.9min. 1
1") 50
1.5
(0.06")
30
(1.18")
s
24
(0.94")
11
(0.43")
30
(1.18")
M16
4.25
(0.17")
19
(0.75")
45
(1.77")
83
(3.27")
1.5
(0.06")
8
(0.31")
43.5
(1.71")
30
(1.18")
30
(1.18")
21
(0.83")
Rm
(5.91in. 150
")
0
11.25
(0.44")
5
(0.20")
Alternative M 2
27
(1.06")
M4
65