Download Operating Instructions Safety Switch TX

Operating Instructions Safety Switch TX...
Correct use
Safety switches series TX are electromagnetic
interlock devices with guard locking.
They interlock movable safety guards so that
 dangerous work on machines can only be carried
out if the safety guard is closed and locked
 the safety guard cannot be opened when the
machine is running.
For the control system, this means that
 starting commands which cause hazardous situations must become active only when the safety
guard is in protective position and the guard locking is in locked position.
The locked position of the guard locking must be
released only when the hazardous situation is no
longer present.
Before safety switches are used, a risk assessment
must be performed on the machine in accordance
with
 EN 954-1, Safety of machinery. Safety related
parts of control systems. General principles for
design, Annex B
 EN 1050, Safety of machinery. Principles for risk
assessment
 IEC 62061, Safety of machinery - Functional safety
of safety-related electrical, electronic and programmable electronic control systems.
Correct use includes compliance with the relevant
requirements for installation and operation, in
particular
 EN 954-1, Safety of machinery. Safety related
parts of control systems. General principles for
design
 EN 1088, Safety of machinery. Interlocking
devices associated with guards. Principles for
design and selection
 EN 60 204-1, Safety of machinery. Electrical equipment of machines. General requirements.
Safety Precautions
The guard locking pin is held in locked position by
electromagnetic force and released by spring force.
The guard locking operates in accordance with the
open-circuit current principle.
 Closing and locking
The guard locking pin is released by insertion of the
actuator into the safety switch.
TX1 and TX3: The guard locking pin is moved to
locked position by spring force.
The safety contacts are closed.
Figure 1: Changing the actuating direction
 Unlocking

TX1 and TX3...110/230: When the operating voltage is applied to the solenoid, the guard locking pin
unlocks the actuator / safety guard to the switch
position Unlocked (see Figure 2).
TX3...024: On the application of the control voltage
when the solenoid operating voltage is present, the
guard locking pin unlocks the actuator / safety guard
to the switch position Unlocked (see Figure 2).
TX2 and TX4...110/230: When the operating voltage is removed from the solenoid, the guard locking
pin unlocks the actuator / safety guard to the switch
position Unlocked (see Figure 2).
TX4...024: When the operating voltage is removed
from the solenoid and/or the control voltage is
removed, the guard locking pin unlocks the actuator / safety guard to the switch position Unlocked
(see Figure 2).
On the versions TX3 and TX4 the actuator can be
unlocked by pulling it.
The safety contacts are opened.
 Opening
Safety switches must not be bypassed (bridging of contacts), turned away, removed or
otherwise rendered ineffective.
Only switching elements marked with the positive opening symbol shall be used for the safety
circuit.
Mechanical release
Safety switches series TX permit locking of movable
safety guards.
In the event of malfunctions, the guard locking can
be released with the mechanical release irrespective
of the state of the solenoid (see Figure 3).
 Unscrew locking screw
 Using a screwdriver, turn the mechanical release
by around 180° in the direction of the arrow
Position monitoring of the safety guard and monitoring of interlocking are performed via the same
switching element.
The locking screw must be returned to its original
position and sealed after use (for example with
sealing lacquer).
Version TX1 and TX3
Mounting
(spring interlock)
The guard locking pin is held in locked position by
spring force and released by electromagnetic actuation. The guard locking functions in accordance
with the closed-circuit current principle. The safety
guard cannot be opened immediately in the event of
interruption of the solenoid power supply.
Version TX2 and TX4
(solenoid interlock)
This type may be used only in special cases
after strict assessment of the accident risk!
The safety guard can be opened immediately in
the event of interruption of the solenoid power
supply!
A
TX4...024: The guard locking pin is moved to
locked position by applying the control voltage when
the solenoid operating voltage is present.
The guard locking pin is blocked when the actuator
is pulled out. The safety contacts remain positively
opened.
Function
Changing the actuating direction
TX2 and TX4...110/230: The guard locking pin is
moved to locked position when the solenoid operating voltage is applied.
Safety switches perform a personal protection
function. Incorrect installation or tampering can
lead to severe injuries to personnel.
The switching operation must only be triggered
by actuators specifically provided for this purpose which are permanently connected to the
safety guard.
Permanently connect the actuator to the safety
guard so that it cannot be detached, e.g. using
the enclosed non-removable screws, rivets or
welding.
 Fit an additional stop for the movable part of the
safety guard.

Mounting must be performed only by authorized
personnel.
Assemble the safety switch so that
 access to the switch is difficult for operating
personnel when the safety guard is open
 it is possible to operate the mechanical release
and check and replace the safety switch.
Safety switches and actuators must not be used
as an end stop.
Mount the safety switch only in assembled
condition!
 Insert the actuator in the actuating head.
 Mount the safety switch positively.
Unscrew and open switch cover.
Remove actuating head from the switch by turning and
refit in the required position (bayonet fastening).
 Fit locking pins supplied for protection against
twisting.
 Close the cover and screw in position.
 Cover the unused actuating slot with the enclosed
slot covers.

Protection against environmental effects
A lasting and correct safety function requires that
the actuating head must be protected against the
penetration of foreign bodies such as swarf, sand,
blasting shot, etc.
Cover the actuating slot, the actuator and the rating
plate during painting work!
Electrical connection
Electrical connection must be performed only
by authorized personnel.
The solenoid operating voltage, the LED operating
voltage and the control voltage (only TX3...024 and
TX4...024) for the locking solenoid must comply
with the information on the rating plate (e.g. UB =
AC/DC 24 V).
Solenoid operating voltage and control voltage can
be bridged if a current of 2A can be supplied for
TIMP = 250ms on switching on the solenoid.
 Version TX...M/N (cable entry)
 Unscrew locking screw for the required insertion
opening.
 Fit the cable gland with the appropriate degree
of protection.
 For pin assignment see Figure 5.
 Tighten the screws for the switching element with
a torque of 0.5 Nm.
 Check that the cable entry is sealed.
 Close the cover and screw in position.
 Version TX..RC18/BH12 (plug connector)
 For pin assignment see Figure 6.
Setup
 Mechanical function test
The actuator must slide easily into the actuating
head. Close the safety guard several times to check
the function.
 Electrical function test
 Close the safety guard.
Start the machine.
It must not be possible to open the safety guard!
 Switch off the machine.
Open the safety guard.
The machine must not start when the safety
guard is open!
Actuator inserted
locked
unlocked
locked
Service and inspection
Actuator removed
open
&
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
33
21
13
42 TX.A-...
34
22
14
41
33
21
11
42
34
22
12
41
33
21
11
42
34
22
12
41
33
21
11
42
34
22
12
41
33
21
11
42 TX.B-...
34
22
12
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
33
21
13
42 TX.C-...
34
22
14
Figure 2: Switching elements and switching functions
4.
3.
2.
1.
4.
3.
2.
1.
1
2
4
3
5
2
1
U B LED LED U S 0V
GN RD
Insertion
depth
s
134
GN
TX3...024
TX4...024
Exclusion of liability under the following
conditions:
Leading with screen
spring
12
1
18
17
10
13
2
19
16
9
14
3
15
4
8
7
5
6
1
GN
2
25,5
15
4
3
39
19
RD
7
41
42
8
13
33
34
14
9
21
22
10
11 11/13
12/14 5
PE/12
G
21,5
59
Figure 3a:
TX...M G = M20x1.5
TX...N G = 1“ NPT
1
6
TX3...RC18
TX4...RC18
4,5
8,5
4
17
GN
2
15
Figure 3b:
5
3
16
22
TX...C18
19
RD
65
inserted
80
Figure 3c:
TX...BH12
Approach speed, max.
20 m/min
Switching principle
Slow-action switching element
Contact material
Silver alloy, gold flashed
Connection type on switching element
Screw terminals
Connection type on circuit
board
Cage-pull clamps
Conductor cross-section
Max. 1.5 mm2
Ui = 250 V
Ui = 50 V
9
21
22
10
Utilization category for the switching element to IEC 947-5-1
11 11/13
12/14 5
AC-15
DC-13
4 A 230 V
4 A 24 V
Switching voltage, min.
12 V
Short circuit protection
(control circuit fuse)
11
29
R
10
6
5
1
Duty cycle
100 %
Operating frequency max.
on TX3 and TX4
45 min-1
Control voltage US
on TX3...024 / TX4...024
AC/DC 24 V
Actuating force
35 N
Extraction force
35 N
Retention force
20 N
Locking force Fmax
1700 N
Locking force Fzh in accordance (F = Fmax) = 1300 N
Zh
with Test Principles GS-ET-19
1.3
3
2
GN
1
5
RD
4 A gG
Solenoid operating voltage UB /
AC/DC 24 V
8 W power input
(TX3...024 and TX 4...024:
AC/DC 110 V 10 W
IB = 2 A for TIMP = 250 ms)
AC/DC 230 V 11 W
12 7
3
3
Figure 4: Insertion depth and approach radii
Any, actuating head down
preferred
14
8
9
2 10
4
TX3...BH12
TX4...BH12
> 440
-20...+80°C
Installation position
34
5
> 300
>1x106
Ambient temperature
42
4
32 + 8
Mech. operating cycles
41
R
32 + 1
IP 67
IP 65
33
Figure 3: Dimension drawings
Standard
Degree of protection
according to IEC 529
with cable gland
with plug connector
13
60
inserted
75
1
Pin assignment
Plug connector
BH12
Overtravel
Die-cast alloy, cathodically
dipped
Switching current, min., at 24 V 1 mA
58
Insertion depth s Approach radius R
Value
Housing material
7
∅26
Actuator
Parameters
Rated insulation voltage
with cable gland
with plug connector
Leading with
screen spring
R

8
PE/12
∅26
if the unit is not used for its intended purpose
non-compliance with safety regulations
 installation and electrical connection not performed by authorized personnel
 failure to perform functional checks.

Technical data
6
16
Replacement of individual parts or assemblies
is not permitted!
Safety switches must be exchanged completely after
1 million switching operations.
TX1/TX2
TX...110/230
11
Pin assignment
Plug connector
RC18
TX1...RC18
TX2...RC18
30
42
4
Figure 5: Circuit diagrams
Locking
screw
18,8
3
U B LED LED 0V
GN RD
Insertion
depth
for
M5 > 45 mm
ISO 1207
(DIN 84),
ISO 4762
(DIN 912)
Mechanical
RD release
4.
3.
2.
1.
If damage or wear is found, the complete switch
and actuator assembly must be replaced.
s
58,5
46
4,5
240
4.
3.
2.
1.
No servicing is required, but regular inspection
of the following is necessary to ensure trouble-free
long-term operation:
 correct switching function
 secure mounting of components
 dirt and wear
 sealing of cable entry
 loose cable connections or plug connectors.
12
41
42
33
34
21
22
11/13
12/14
4
6
2
11
PE/9
Figure 6: Pin assignment
EUCHNER GmbH + Co. KG Kohlhammerstraße 16 D-70771 Leinfelden-Echterdingen Tel. +49/711/75 97-0 Fax +49/711/75 33 16 www.euchner.de [email protected]
Subject to technical modifications; no responsibility is accepted for the accuracy of this information. © EUCHNER GmbH + Co. KG 079777-03-10/06
Operating Instructions Safety Switch TX...