Safety Interlock Switches
TL4019
Safety Interlock Switch with Guard Door Locking
• High locking force of 1,200 N (270 lb.) locks guard door shut until machine is safe to enter
• IP67 (NEMA 6) enclosure enables the TL4019 to withstand water washdown
• Door and lock monitoring—the TL4019 has a total of 4 contacts: 2 N/C safety + 1
contact for door position monitoring + 1 contact for lock monitoring
• Rear manual release—allows unlocking of switch from inside of guarded area per
ANSI/RIA R15.06
• Narrow profile enables mounting to 2 in. square tubing or in applications with
space restrictions
• Rotatable head—the rotatable head of the TL4019 provides 8 actuator entry posi-
tions to satisfy most installation requirements
• Optional key release—this option on power-to-unlock models allows manual
unlocking of the guard door
• Optional slide bolt with integral door handle aids installation on sliding and swing-
ing guard doors
• A Rapid Delivery Product: Select models are available for shipment today or within
3 to 5 days
R
C
US
Specifications
Electrical
Safety Contacts:
Auxiliary Contacts:
All Models
TL4019-1 & -2
2 N/C
2 N/O
TL4019-3 & -4
2 N/C
1 N/O + 1 N/O
1 N/O + 1 N/C
1 N/C + 1 N/O
TL4019-5
1 N/C
1 N/C + 1 N/O
Conforms to EN60947-5-1, EN1088,
EN ISO 13849-1
UL and C-UL listed
DGUV approved
G
Switching Ability
Safety Contact Material:
Minimum Current:
Solenoid Supply Voltage:
Solenoid Power:
Solenoid Rating:
Mechanical
Mounting:
Mounting Hardware:
Min Operating Radius:
AC: 230 V – 4 A
DC: 24 V – 4 A
Silver alloy with gold flash
24 V 1 mA
24 VAC/DC or 110 VAC (all -15% / +10%)
8W
100% duty
Any position
4 x M5 screws (not supplied)
Approximately 100 mm (3.9 in.) with flex actuators
Approximately 1000 mm (39 in.) with flat and 90-degree actuators
1200 N (270 lb.)
20 m/min.
Reinforced thermoplastic
Stainless steel
3 x M20 conduit with 0.5 in. NPT adapter
500 g (17 oz.)
Red
1 x 10
6
minimum
Max Holding Force:
Max Actuation Speed:
Case Material:
Actuator Material:
Wiring Entry:
Weight:
Color:
Mechanical Life:
Environmental
Protection:
IP67 (NEMA 6)
Operating Temperature:
-20 to 55°C (-4 to 131°F)
Cleaning:
Water washdown
Compliance
Standards:
EN60947-5-1, EN1088, EN ISO 13849-1
Approvals/Listings:
CE marked for all applicable directives, UL and C-UL, DGUV
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.
Select models are available for Rapid Delivery.
Visit this product on www.sti.com for details..
www.sti.com/info
G-43
TL4019
Safety Interlock Switches
Operation
Optional Slide Bolts
• Allows easy installation of
switch on machine guards
• Actuator included (order
switch separately)
• Integral handle included
• Metal is ideal for heavy
doors; plastic is suitable for
smaller and lighter doors
• Slotted hole in bolt permits
attaching multiple padlocks
• Yellow color for easy
recognition
Plastic
Slide Bolt
Metal Slide Bolt
G
Alignment Guide
Optional stainless steel align-
ment guide aids actuator entry
and is easily installed.
Flat Actuator
Available with and without
rubber bushings.
90-Degree Actuator
Available with and without
rubber bushings.
Optional Rear Release
• Allows manual rear release
of a locked switch from
inside a guarded area per
ANSI/RIA R15.06
• May be installed on switch in
conjunction with or without
the use of a slide bolt
• Must use with Rear Release
Switch Models only
Optional Key Release
A key release unit is eas-
ily attached to the TL4019 to
provide emergency override of
the switch locking mechanism
by a qualified, responsible
person.
Flexible 1 Actuator
15 degree flexibility may be
adjusted with the set screw.
Flexible 2 Actuator
15 degree flexibility may be
adjusted with the set screw.
Rear Release Actuator
(Included with Rear
Release Switches)
Rear Release T-Handle
(Order separately)
Optional SLD Series
Optional switch locking
devices are available. See
accessories section for details.
Optional LED Lid Kit
Provides red
and green LED
indicators with
user-configured
operation.
Optional Interior
Lever Kit
Use with
metal rear
release slide
bolts.
G-44
www.sti.com/info
TL4019
Safety Interlock Switches
Operation (continued)
Contact Arrangements
With Unlock Request Contact
1UR
1 positively driven N/C contact as door unlock request contact
1 positively driven N/C contact + 1 N/O (without door contact)
Actuator
Removed.
Unlocked
With Door Contact
1WD
2WD
3WD
2 positively driven N/C contacts + 1 N/O + 1 N/O as door contact
2 positively driven N/C contacts + 1 N/O + 1 N/C as door contact
2 positively driven N/C contacts + 1 N/C + 1 N/O as door contact
Actuator
Completely Inserted.
Closed
Request
Actuator Inserted
Locked
Unlocked
E1
E2
E1
E2
E1
E2
Actuator
Removed
31
21
13
32
22
14
31
21
13
32
22
14
31
21
13
32
22
14
E1
E2
E1
E2
E1
E2
1UR
41
42
34
22
14
41
33
21
13
42
34
22
14
41
33
21
13
42
34
22
14
G
33
21
Without Door Contact
1ND
2 positively driven N/C contacts + 2 N/O
Locked
Actuator Inserted
Unlocked
Actuator
Removed
1WD
13
41
33
21
42
34
22
12
41
33
21
11
42
34
22
12
41
33
21
11
42
34
22
12
2WD
E1
E2
E1
E2
E1
E2
11
41
33
21
13
42
34
22
14
41
33
21
13
42
34
22
14
41
33
21
13
42
34
22
14
41
42
32
22
14
41
31
21
13
42
32
22
14
41
31
21
13
42
32
22
14
1ND
31
21
13
3WD
Select models are available for Rapid Delivery.
Visit this product on www.sti.com for details..
www.sti.com/info
G-45
TL4019
Safety Interlock Switches
Applications
Typical applications are on
sliding guard doors and swing-
ing guard doors that must
remain locked until a signal is
applied to the internal solenoid
that unlocks the guard door.
✎
For a wiring example of the TL4019 switch with a see
SR209AD delayed output safety monitoring relay
“Common Circuit Examples” in the Expert Area Section of
this catalog on page A-31
Application Monitoring Units
G
SR223SMT
Timer Unit
Used with the TL4019 for
machines with constant over-
run. Gives a timed delay to the
lock/release signal. Failsafe
and adjustable to a range of
times from 1.0 seconds up to
31 seconds.
SR125SMS45
Stop Motion
Sensing Unit
Used with the TL4019 for
machines with inconstant or
variable overrun. Senses back
EMF of AC or DC motors.
Failsafe and adjustable to a
range of 0.01 V to 0.10 V.
Safety Monitoring
Relay Units
Safety monitoring relays ensure a
maximum level of safety by monitoring
all wiring in the safety circuit, including
switches and contactors. Any fault and
the power to the machine is switched off.
A variety of safety monitoring relay units
are available.
these Safety
✎
For information on see page J-1.
Monitoring Relays,
Select models are available for Rapid Delivery.
Visit this product on www.sti.com for details..
G-46
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TL4019
Safety Interlock Switches
Dimensions
TL4019
3.5
0.14
31
1.22
h
Travel
Travel
(mm/in.)
Optional Metal Slide Bolt for TL4019
18
0.71
30
For
1.18 Screw
M6
20
0.79
40
1.57
15
0.59
110
4.33
For Screw
M6
42 60
1.65 2.36
76
3
14
0.55
V
35 43
1.38 1.69
20
0.79
0.3
0.012
For M5
>
35
1.38
ISO 1207
(DIN 84)
ISO 4762
(DIN 912)
144
5.67
Mechanical
unlocking
mechanism
(except
TL4019-5)
Mechanical
unlocking
screw
35
1.38
192
7.56
Adjusting screw
safeguarded
For Screw M6
Slot provided
for rear
release model
171.5
6.75
M20 (3x)
283
11.14
305
12
144
5.67
30
1.18
M5 (4x)
Optional slide bolt interior
kit PN 44534-8050 must be
ordered separately
Guard frame
40
40
X
1.57 1.57
G
19.5
0.77
40
1.57
16
0.63
40
1.57
30
1.18
For Screw
M6
Overtravel
Flat Actuator
35
1.38 58
2.28
Overtravel
90-Degree Actuator
All non-overtravel
actuators
30
1.18
35
1.38
15
0.59
3
0.12
47
1.85
16 8
0.63 0.31
88
3.46
20
0.79
3
0.12
5.5
0.22
20
0.8
48
1.89
18
0.7
33 10
1.3 0.39
69
2.72
58
2.28
135
5.31
62
2.44
Door hung on right
15
0.59
5.5
0.22
Min. door radius 1000
39.4
✎
For the optional Plastic Slide
Bolt Dimensions, see www.sti.com
Min. door radius 1000
39.4
Flexible 1 Actuator
14
0.55
Ø5.5
0.216
50
1.97
40
1.575
29
4 1.14
0.16
33.2
1.31
Flexible 2 Actuator
R>
100
3.94
50
1.97
40
1.575
20
0.79
R>
90
3.54
Adjustment
Screw
16
0.63
35
1.38
30
1.2
35
1.38
Ø5.3
0.21
19
0.75
26
1.02
54
2.13
10
0.39
Min. door radius 90
3.54
Adjustment
Screw
Adjustment
Screw
8
0.315
18
0.71
8
0.315
Adjustment
Screw
40
1.57
Min. door radius 100
3.94
23
0.91
28 +7
1.1 +0.28
16
0.63
28 +7
1.1 +0.28
35
1.38
16
0.63
Select models are available for Rapid Delivery.
Visit this product on www.sti.com for details..
www.sti.com/info
G-47
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