Description
Control valves
Pneumatic actuators
Local regulations may restrict the use of this product to below the conditions quoted.
In the interests of development and improvement of the product, we reserve the right to change the specification without notice.
© Copyright 2015
SLM1, SLM2, SLI1 and SLI2
Limit Switches
The switch kits are for use with linear pneumatic actuators conforming to the NAMUR standard. The series provides switched electric or
variable resistance outputs, relative to the valve actuator position.
How to choose the right limit switch for your actuator and application:
Identify the actuator and valve travel
Identify your electronic signal requirements
Make your choice between the inductive or mechanical
and if you require one or two sensors.
Do you need ATEX certification ?
Applications and technical data
The switch kits series can be used with the following Spirax Sarco actuators using the fixing kit specified:
4.2.36
Limit switches
SLM1
This switch consist
of two mechanical
micro-switches within
a single unit to provide
valve actuator position
(open / close) after
setting
SLM2
This switch consist
of two mechanical
micro-switch units
to provide
valve actuator position
(open / close) after
setting
SLI1
This switch consist of
two proximity sensors
within a single unit
to provide
valve actuator position
(open / close) after
setting
SLI2
This switch consist of
two proximity sensors
to provide
valve actuator position
(open / close) after
setting
Travel < = 30 mm
Travel > = 30 mm
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•
•
•
•
•
Maximum
voltage and
current
ac
250 Vac 16 A
48 Vdc 16 A
100 000 - 16 A
500 000 - 5 A
20 000 000 - 0.2 A
-20°C to +85°C
IP65
24 Vac 6 A to
250 Vac 3 A
12 Vdc 10 A
to 230 Vdc 5 A
150 000 - 10 A
10 000 000 - 3 A
15 000 000 - 0.1 A
-25°C to +70°C
IP66
0.1 A
30 Vdc
111 years
(worst case)
0.1 A
30 Vdc
218 years
(worst case)
dc
Ratings and standards:
Mechanical life
Life MTTFd (mean time to
dangerous failure)
SIL
Temperature
ATEX
Ingress Protection (IP)
-25°C to +70°C
ATEX II 3G Ex nA II T6
-20°C to +60°C
ATEX II 3G
Example: If the travel < = 30 mm then choose between an SLM1, SLI1 or SLI2
Example: 250 Vac and 3 A = > Choose between an SLM1 or SLM2
Example: 2 sensors open / close in inductive = > Choose an SLI1
Example: Yes = > Choose between an SLI1 or SLI2
ATEX II 3D Ex tD 22A
IP67 T80°C
ATEX II 3D
IP67
IP68
TI-P369-01
CH Issue 3
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