Safety Interlock Switches
SLM
For full product information, visit www.sti.com. Use the SpeedSPEC Code for quick access to the specific web page.
SLM
Mini Safety Limit Switch
• Miniature size will fit in the most confined spaces, while provid-
ing the performance of larger units
• NEMA 1 enclosure makes the SLM suitable for dry, dust-free,
indoor applications
• Choice of roller plunger orientations will satisfy most installation
requirements
• Positive operation—all contacts are force guided for positive
operation by the actuator conforming to safety switch standards
• Long life—the SLM with its stainless steel roller plunger is
designed for ten million actuations
• A Rapid Delivery Product: Select models are available for ship-
ment today or within 3 to 5 days
G
Specifications
Electrical
Contact Configurations:
Safety Contacts:
Switching Ability
All Models
1 N/C + 1 N/O
1 N/C positive break
AC: 500 V–1 A, 250 V–2 A, 100 V–5 A
DC: 250 V–0.5 A, 24 V–2 A
> 2 mm (0.079 in.)
1 N/O
500 V/500 VA
5 V 5 mA DC
1 x 10
6
minimum
C
US
Conforms to EN1088, EN292,
EN60947-5-1, EN60204-1
CSA approved
Safety Contact Gap:
Auxiliary Contacts:
Max Switching Current/Volt/Amp:
Minimum Current:
Electrical Life:
Mechanical
Mounting:
Any position
Mounting Hardware:
2 x M3 or 2 x M4 screws
Actuator Travel for Positive Opening:
2.5 mm (0.098 in.)
Max Actuator Travel:
5 mm (0.197 in.)
Break Contact Min Force:
10 N (2.25 lb.)
Max Actuation Speed:
160 mm/sec (6.30 in./sec)
Max Actuation Frequency:
2 cycles/sec
Case Material:
UL listed glass-filled polyester
Actuator Material:
Stainless steel roller/acetal plunger
Wiring Entry:
3 x wiring breakous
Weight:
36 g (1.3 oz.)
Color:
Red
Mechanical Life:
10 x 10
6
minimum
Environmental
Protection:
IP30 (NEMA 1)
Operating Temperature:
-25 to 80°C (-13 to 176°F)
Compliance
Standards:
EN1088, EN292, EN60947-5-1, EN60204-1
Approvals/Listings:
CE marked for all applicable directives, CSA
Reliability Data
per EN ISO 13849-1:
B10d: 2.00E+06
Specifications are subject to change without notice.
Note: The safety contacts of the STI switches are described as normally closed (N/C)—
i.e., with the guard closed, actuator in place, and the machine able to be started.
G-140
www.sti.com/info
SLM
Safety Interlock Switches
Actual Size
Operation
Cam Displacement
(A)
or
or
Operating Example
Trojan
Contact Arrangements
Cadet/Ensign
Elf/Sprit
2.13 in
54 mm
Senator
(SLM 1 & 2 -
Imp
break make)
slow
0
0.039
1
CONTROL UNIT
SENSOR
FRS1, 2, 20
250 Vac 2A
100 Vac 5A
Made in England
0.96 in
25 mm
The actuating cam should be
profiled at 30° for optimum
operation.
Ferrocode Sensor
Ferrotek
SENSOR
SLM
1
2.5
Ferrocod
AC/DC A2 A1
34
100% ED.
53 22
54
42
41 12
33
21
11
AC/DC A2 A1
34
100% ED.
51 22
52
42
41 12
33
21
11
AC/DC
100% ED.
3
A1 A2
9 10
CONTROL UNIT
11/12
23/24
.0197
5
FRS20
FRS1
FRS2
30°
or
7
Titan TLS 1 & 2
Titan TLS 3
G
Atlas 4
Applications
Typical Application of SLM with a Safety Monitoring Relay
24VAC/DC, 110VAC, 230VAC
K1
(AUX)
START
MOMENTARY
PUSH
BUTTON
11
23
or
Lifeline 1
Typical applications are on
sliding guard doors, moving
Lifeline 2
machine beds, crane arms,
etc.
Lifeline
K2
(AUX)
STOP
MOMENTARY
PUSH
BUTTON
L1 L2 L3
GUARD
CLOSED
SLM SERIES
SWITCH
RESET
MOMENTARY
PUSH
BUTTON
CU1
CU2
MSR5T
12
24
A1
Power supply
(S11 = 24 V)
S11
S21
S12
S14
13
23
33
41
11
23
SLM
SERIES
SWITCH
Relay control and
fault monitoring
K1
K2
MSR7C
+
K2
12
24
STOP
SR103AM
A2
S10
S13
+
K1
AC/DC A1 A2
100% ED.
3
14
24
34
42
M
9 10
7
21
CONTACT
PROTECTION
E.G. THERMAL
CUT OUT
MSR9T
MSR10 R
8
22
4
EB SERIES
LATCHING
E-STOP BUTTON
FUSE
K1
K2
FUSE
Atlas 4 (3 pole)
MSR11R &
BUTTON 1
full explanation
and fault detection,
Trojan
✎
For a“Common Circuit of the circuitinoperating principleSection of this catalog on page A-31
see
Examples” the Expert Area
BUTTON 2
E-STOP
Protekta 2 hand control
Rotacam 3
www.sti.com/info
G-141