Brochure

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Limit switches
OsiSense XC
General
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21
14
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13
21
14
22
13
21
14
22
13
21
14
22
21 22
13 14
21 22
13 14
1 mA
2
mA
3 mA 6 mA
10
mA
5
6
10
8
20
60
100
15
150
200
500
2 A3A 6A 10
A 1 A
120
240
24
1
2
3
4
V
48
(1)
Insulation voltage limit
Heating limit (Ithe)
Inductive
zone
Contact blocks
Snap action contacts
b Snap action contacts are characterised by different tripping and reset points (differential travel).
b The displacement speed of the moving contacts is not related to the speed of the operator.
b This feature ensures satisfactory electrical performance in applications involving low speed
actuators.
Unactuated state Approach travel Contact change of state Positive opening
Slow break contacts
b Slow break contacts are characterised by identical tripping and resetting points.
b The displacement speed of the moving contacts is equal, or proportional, to the speed of the
operator (which must not be less than 0.1 m/s = 6 m/minute).
The opening distance is also dependent on the distance travelled by the operator.
Electrical durability for normal loads
b Normally, for inductive loads, the current value is less than 0.1 A (sealed), i.e. values of 3 to
40 VA sealed and 30 to 1000 VA inrush, depending on the voltage.
For this type of application the electrical durability will exceed 10 million operating cycles.
Application example: XCKJ161 + LC1D12pppp (7 VA sealed, 70 VA inrush).
Electrical durability = 10 million operating cycles.
Switching capacity
1 Normal industrial PLC input type 1 (PLC: industrial programmable logic controllers)
2 Normal industrial PLC input type 2
3 Switching capacity conforming to IEC 60947-5-5, utilisation category AC-15, DC-13
A300 240 V 3 A B300 240 V 1.5 A
Q300 250 V 0.27 A R300 250 V 0.13 A
4 Switching capacity conforming to IEC 60947-5-1, utilisation category AC-15, DC-13
A300 120 V 6 A B300 120 V 3 A
Q300 125 V 0.55 A R300 125 V 0.27 A
Electrical durability for small loads
b The use of limit switches with programmable controllers is becoming more common.
b With small loads, limit switches offer the following levels of reliability:
v failure rate of less than 1 for 100 million operating cycles using snap action contacts
(contacts XE2SP),
v failure rate of less than 1 for 20 million operating cycles using slow break contacts
(contacts XEpNP and XE3SP).
v failure rate of less than 1 for 5 million operating cycles using contacts XCMD.
Range of use
Standard
contacts
Continuous
service (frequent
switching)
XE2SP2151, P3151
XE2NPpppp
Contacts of XCMD
XE3pPpppp
Gold ashed
contacts
on resistive load
Occasional service
Infrequent switching,
y 1 operating cycle/
day, and/or corrosive
atmosphere
(1)
(1) Usable up to 48 V/10 mA.
Contact blocks