Teknic EF-785, Руководство по установке

Страница: 62 / 90

This assumes that certain basic safety requirements (guarding etc.) are
met. See list below for details.
Teknic created a list of basic assumptions about a hypothetical
machine that features the eF-785 Power Distribution and Safety Control
Center. These assumptions (and a test setup consistent with them) were
used in the FMEA and fault testing to assure that the eF-785 meets the
requirements of EN-954-1 and EN 1050. The objective of this section is
to make it clear how to use the eF-785 while complying with
requirements EN 954-1 and EN 1050.
Your machine must comply with all of the applicable assumptions in
order to meet the CE machine safety requirements:
1. All hazards in the machine must be internal, behind frame
members, covers (skins), and inaccessible to the user. The user
must be protected from accessing them by movable guards that
are monitored and/or locked by the eF-785.
2. All hazards must be supervised and powered by the eF-785 and
made harmless by the removal of hazard power from the given
area.
3. Fixed and moveable guards for hazards must be designed and
installed in accordance with EN 953.
4. If the machine is segmented (designed with separate Main and
Load/unload Areas) any operation or failure of the Main Area
can’t cause a hazard (electrical or mechanical) to exist in the
Load/unload Area by virtue of the construction of the machine.
5. All interlocks with guard-locking must have their unlock solenoid
under the direct control of the eF-785 using the separate and
specific outputs for the Main and Load areas.
6. The machine’s moveable guards must employ interlock switches
with guard-locking wherever the operator enters the hazard area
of the machine at a medium frequency (e.g. a typical
Load/Unload Area guard).
7. The machine’s moveable guards must employ interlock switches
wherever the operator enters that hazard area at a low frequency
of access and opening the guard to access the area requires the
use of a tool. Each guard must be marked appropriately to
indicate the presence of a hazard behind it.
8. The machine’s moveable guards must employ interlock switches
with guard-locking in the Load/unload Area, regardless of
frequency of access or whether access requires the use of a tool or
not.
9. For areas behind guards that are accessed at a medium
frequency, the size and or construction of these areas must not
permit a person to get inside and close the guard.
10. Under any control system, failure hazards must not protrude
beyond the machine perimeter exposing themselves to the
operator or other personnel. Appropriate measures must be
taken in the construction of the machine to ensure this,
including, but not limited to, a strong frame, appropriately rated
bearings, bumpers, shock absorbers and strong covers (if
required). Guards must not be relied upon as part of the system
that constrains these hazards from protruding beyond the
60
V
E R S I O N
1 . 4 2 / A
U G U S T
2 6 , 2 0 0 5