Interlock Switches
Tongue Switches
Elf
Specifications
Standards
EN954-1, ISO13849-1, IEC/EN60204-1,
NFPA79, EN1088, ISO14119, IEC/
EN60947-5-1, ANSI B11.19, AS4024.1
Category
Cat. 1 Device per EN954-1
Dual channel interlocks suitable for
Cat. 3 or 4 systems
Approvals
CE marked for all applicable directives,
cULus and BG
Safety Contacts
1 N.C. or 2 N.C. direct opening action
Designation/Utilization Cat.
600V 500V 240V 120V
1.2A 1.4A 3A 6A
600V 500V 250V 125V
0.4A 0.55A 1.1A 2.2A
A600/AC-15 (Ue)
(Ie)
N600/DC-13 (Ue)
(Ie)
Thermal Current (lth)
Minimum Current
10A
Description
5V 5mA DC
>2mm (0.078in)
The Elf is a tongue (or key) operated safety interlock switch
designed to fit at the leading edge of sliding, hinged or liftoff guards.
The Elf’s unique miniature housing (only 75 × 25 × 29mm) makes it
the smallest interlock currently available. It is designed for smaller
machines such as printers, copiers or domestic machinery which,
until now, have been unable to use safety interlocks due to space
restrictions.With its dual entry slots and rotatable head, the versatile
Elf can offer up to eight different actuator entry options.
Safety Contact Gap
Rtd. Impulse withstand Volt. (Uimp) 2500V
Auxiliary Contacts
1 N.O.
3
Pollution Degree ➊
Actuator Travel for Positive
Opening
3.6mm (0.141in)
Min Operating Radius
150mm (5.90in)
Operation of the switch is achieved through the insertion of a
specially profiled stainless steel key that is permanently mounted to
the guard door. The semi-flexible key allows the Elf to be used on
small radii doors (60mm or 2.36in).
60mm (2.36in) with GD2 kit
Break Contact Min Force
Max Actuation Speed
Max Actuation Frequency
Case Material
Actuator Material
Protection
6N (1.35lb)
160mm (6.29in) per sec
2 Cycle per sec
The Elf is available with 2 N.C. or 1 N.O. and 1 N.C. safety contact
and conduit entry (1 × M16 or connector style) sealed to IP67
(watertight and dustproof). A blanking plug is supplied for the
unused key entry.
UL approved glass filled polyester
Stainless Steel
IP67
Conduit Entry
Operating Temperature
Fixing
1 x M16 or quick-disconnect style
-20°C to +80°C (-4°F to +176°F)
2 x M4
Features
•
•
•
•
•
Ideal for small, light weight guards
The smallest interlock switch available
Contacts, 2 N.C. or 1 N.O. & 1 N.C.
Eight possible actuator entry points, easy to install
Environmental protection: IP67
Mounting
Any position
Mechanical Life
Electrical Life
1,000,000 operations
1,000,000 operations
60g (2.11oz)
Weight
Colour
Red
➊ Conductive pollution occurs, or dry, non conductive pollution occurs which
becomes conductive due to condensation.
Applications
Note: Lift-off guards require good alignment when using
tongue actuated interlock switches.
IMPORTANT: It must not be possible to lift the guard
without actuating the interlock. An interlock on either
side may be required.
3-2