5 System
Operation
5.1 Security Protocol
Certain procedures for installing, maintaining, and
operating
the EZ-SCREEN Type 2 must be performed by either Designated Persons or
Qualified
Persons.
A Designated Person is
identified
and designated in
writing,
by the employer, as being appropriately trained and
qualified
to perform
system resets and the
specified
checkout procedures on the EZ-SCREEN Type 2. The Designated Person is empowered to:
• Perform manual resets and hold possession of the reset key (see
• Perform the Daily Checkout Procedure
A
Qualified
Person, by possession of a recognized degree or
certificate
of professional training, or by extensive knowledge, training, and
experience, has successfully demonstrated the ability to solve problems
relating
to the
installation
of the EZ-SCREEN Type 2 System and
its
integration
with the guarded machine. In
addition
to everything for which the Designated Person is empowered, the
Qualified
Person
is empowered to:
• Install the EZ-SCREEN Type 2 System
• Perform all checkout procedures
• Make changes to the internal
configuration
settings
• Reset the System following a Lockout
condition
5.2 Reset Procedures
System resets are performed using an external reset switch. This switch must be located outside the guarded area, and must not be
within reach from within the guarded area (see
on page 15). Its
location
should provide a clear view of the
entire
safeguarded area. If any hazardous areas are not in view from the switch
location,
additional
means of safeguarding must be provided.
The switch should be protected from accidental or unintended
actuation
(for example, through the use of rings or guards).
If supervisory control of the reset switch is required, a key switch may be used, with the key kept in the possession of a Designated or
Qualified
Person. Using a key switch provides some level of personal control, since the key may be removed from the switch. This
hinders a reset while the key is under the control of an individual, but must not be relied upon solely to guard against accidental or
unauthorized reset. Spare keys in the possession of others or
additional
personnel entering the safeguarded area
unnoticed
may create
a hazardous
situation.
5.2.1 Receiver Resets
The EZ-SCREEN Type 2 receiver has a Reset input, pin 8 (violet wire), that provides for a manual reset input signal.
Receiver manual resets are required in the following
situations:
• Trip Output
operation
– only
after
on page 38 for causes).
• Latch Output
operation
– at power-up,
after
each Latch
condition
occurs, or
after
a Lockout.
Reset
Routine
To reset the receiver, close the reset switch for 1/4 to 2 seconds, then open it. An
alternative
method to reset either component is to
power the sensor down, then power it up.
Note: Closing the reset switch too long will cause the sensor to ignore the reset request; the switch must be closed from 1/4
seconds to 2 seconds, but no longer.
5.2.2
Emitter
Resets
In the rare occurrence that an
emitter
requires a reset, power the sensor down, then power it up.
Emitter
resets are needed only if a
Lockout occurs.
5.3 Status Indicators
The
emitter
has one LED and the receiver has four, to provide an ongoing
indication
of light screen and system
operation.
In normal
operation,
the status indicators are as described below and as shown in
on page 36.
Additional
LED
condition
combinations
indicate errors or faults; refer to
on page 38.
EZ-SCREEN
®
Type 2 Light Screen
www.bannerengineering.com - Tel: 763.544.3164
35
