Proper Use; Installation And Connection - Wieland SNH Not-Halt-Taster Instrucciones De Servicio

Operating Manual
SNH EMERGENCY STOP button
R1.200.xxxx.0
SAF ET Y R EGULAT IO NS
• Electrical installations, commissioning and maintenance
work must only be performed by qualified electricians with
relevant accident prevention training and in compliance
with the applicable regulations.
• Safety precautions and safety devices must comply with
the applicable regulations.
• The unit must not be opened.
• Damaged products must neither be installed nor put into
operation.
• Units which have been subjected to improper use (e.g.
falling) or conditions outside the specifications must also
no longer be used.
• Take the following safety precautions before connection
work, installation / assembly and dismantling:
1. Disconnect the device / the system from the power
supply before starting work.
2. Secure the machine / system against being switched on
again.
3. Confirm that no voltage is present.
4. Ground the phases and short to ground briefly.
5. Cover and shield neighbouring live parts.
• Always check all safety functions in accordance with the
applicable regulations during initial commissioning of your
machine / system and observe the specified inspection
cycles for safety devices.
• Limited contact protection!
Protection class according to EN 60529.
− Case / terminals: IP 40 / IP 20.
− Finger-proof according to EN 50247.
1

Proper Use

The units must only be used as components of safety devices
on machines intended to protect persons, material and
machines.
Doc. # BA000612 - 09/2009 (Rev. A) ©2009 Wieland Electric GmbH
ATT ENTION
Modular EMERGENCY STOP button system
EMERGENCY STOP buttons in the SNH Series are electrome-
chanical switching devices for the protection of persons at or
in the vicinity of machines. They are used for switching off /
shutting down machines and systems in order to prevent or
reduce occurring or existing dangers for persons or damage to
the machine or work material.
The operating element actuates the safetyswitching
elements.
The switching elements of the panel mount version are fitted
with a so-called failure switch-off system in order to maintain
the safety in the case of the switching element falling off the
operating element.
The self monitoring opens a contact if the switching element
is separated from the operating element and triggers the
EMERGENCY STOP function.
Products
SNH 0xx0 Operating elements
SNH 00xx Switching elements
SNH 11xx Complete sets
Only use the unit in accordance with its intended purpose.
Also, pay particular attention to the information in the techni-
cal data.
2

Installation and connection

When using illuminated operating elements, maximum 230 V AC
is permitted to be connected to the switching elements.
2.1 Panel mount version
1. Drill mounting holes in the mounting plate
(see illustration on page 25)
2. Insert the operating element through the mounting hole
and fasten it with the lock nut (maximum torque 2.5 Nm)
3. Attach the switching element and turn this clockwise by
one eighth of a turn. The switching element engages.
4. Check whether the contacts of the failure switch-off are
closed when the switching element is engaged and the
operating element
is not actuated.
5. Connect the connecting wires to the terminal blocks. In
doing so, note the permitted electrical and mechanical
values (see Chapter 6 "Technical Data" on page 6)
2.2 Surface-mounted version
1. Mount the bottom part of the case on a flat surface (see
Fig. SNH 6001 on page 25 for the drilled hole spacing)
2. Insert the connecting wire through one of the two M20
cable entries.
3. Connect the connecting wires to the terminal blocks. In
doing so, note the permitted electrical and mechanical
values (see Chapter 6 "Technical Data" on page 6)
3 Check before initial commissioning
• Mechanical function check
− The operating element is fastened so that it cannot twist.
− The mounting nut is tightened so that no play in the
longitudinal direction is discernible.
NOTE
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