TZ1RE024M EUCHNER, TZ1RE024M Datasheet - Page 6

• Manufacturer Part Number: TZ1RE024M
• Description: SAFETY SWITCH
• Manufacturer: EUCHNER

Specifications of TZ1RE024M

• Operating Force Max: 35N
• Contact Voltage Ac Max: 230V
• Contact Voltage Dc Max: 24V
• Contact Current Ac Max: 4A
• Contact Current Dc Max: 4A
• Switch Terminals: Lead
• Case Material: Aluminium, Diecasting

General
Safety switches with separate actuator
On safety switches with separate actuator, the actuating element is se-
parate to the switch and is attached to the moving part of the safety
guard to be monitored. The actuating elements are available in various
versions to suit the safety guard that is to be monitored.
This catalog contains series NZ.VZ, NZ.VZ.VS and TZ switches that are
used in combination with separate actuating elements. The function of
these switches is, apart from the actuating element, identical to the
switches with safety function.
Actuating elements for switches with separate actuator
The safety switches NZ.VZ, NZ.VZ.VS and TZ can only be actuated using
a special actuating element with multiple coding. The coding is a type of
lock and key principle. This means that the safety switch can only be
actuated using an actuating element of a specific shape. Unlike a
conventional key, the actuating elements for switch series are always
the same shape.
The switching element is closed by inserting the actuating element in
the switch head. The positively driven contact is reliably opened by the
positive application of force when the actuating element is removed –
even if the contacts are welded together. In the open state the machinery
or systems are then safely interlocked against starting.
The actuators for the series NZ.VZ and TZ comprise a laminated spring
steel core encapsulated in an abrasion-resistant plastic. As the spring
steel core comprises three layers, complete fracture on overloading is
unlikely. Straight actuators and hinged actuators are available for a wide
range of applications in which hinged and sliding doors are used. Hinged
actuators are spring-mounted actuators that adjust to the inner contours
of the switch on insertion in the actuating head. They are suitable for
small hinged doors with a radius from 165 mm. For sliding doors and
hinged doors with an adequately large pivoting radius (> 1000 mm) a
straight actuator can be used.
6
Attaining the
safety function
Actuation by trip dog
Straight actuator
Attaining the
safety function
Actuation by cam
11
Hinged actuator
12
11
12
If increased play is required when the door is closed, an actuator with
overtravel is available. With this actuator the door can move slightly in
the actuating direction when closed. This is important, e.g., if safety
doors have a rubber end stop. Using an actuator with overtravel, the
continuous pressure from the compressed rubber can be reduced. In
this way the load is reduced on the switch head and the door mechanism.
Switching elements
Different switching elements are available for the safety switches offered
in the catalog:
Only one switching element is fitted to series N1A, NB and NZ safety
switches. Two switching elements are fitted to all series TZ safety
switches. In this case one of the switching elements is used to monitor
the door position (SK) and the other is used to monitor the position of
the interlocking solenoids (ÜK). Switching elements are divided into two
types as a function of their switching behavior:
Slow-action switching element
Slow-action switching elements are mostly used in safety switches. The
opening of the switching element is directly dependent on the position
of the actuator. The further the actuator is moved, the further the
switching element is opened. The actuator travel is therefore directly
proportional to the travel covered by the switching contact in the switching
element. From the travel diagrams it can be seen at which point the
switching element changes from the closed state to the open state.
1 contact switching elements
2 contact switching elements with two independent switching elements
4 contact switching elements with four independent switching elements
Slow-action switching elements and
Snap-action switching elements
Switching
element 2
Switching
element 1
Free position
End position
Snap-action switching element
4 contact switching element
Travel diagram
mm
0
2
3
4
5
6
1
Switching
element 4
Switching
element 3