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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
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 a Lockout (see
•
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
indicate errors or faults; refer to
Reset Switch Location
Troubleshooting and Lockout Conditions
Troubleshooting and Lockout Conditions
www.bannerengineering.com - Tel: 763.544.3164
Reset Procedures
on page 35)
on page 15). Its location should provide a clear view of the entire
on page 38 for causes).
Figure 21
on page 36. Additional LED condition combinations
on page 38.
®
EZ-SCREEN
Type 2 Light Screen
35
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