or Eliminating Pass-Through Hazards
on page 22), the dangerous machine motion can be initiated by normal means only
after the safeguarded area is clear of individuals and the safety related part of the control system that is providing the
latching function has been manually reset.
3.1.3 Control Reliability: Redundancy and Self-Checking
Redundancy requires that EZ-SCREEN LS Basic circuit components be backed up to the extent that, if the failure of a
single component will prevent effective machine stopping action when needed, that component must have a redundant
counterpart which will perform the same function. The EZ-SCREEN LS Basic is designed with redundant microprocessors.
Redundancy must be maintained whenever the EZ-SCREEN LS Basic is in operation. Because a redundant system is no
longer redundant after a component has failed, EZ-SCREEN LS Basic is designed to monitor itself continuously. A
component failure detected by or within the self-checking system causes a stop signal to be sent to the guarded machine
and puts the EZ-SCREEN LS Basic into a Lockout condition.
A recovery from this type of Lockout condition requires:
• Replacement of the failed component (to restore redundancy)
• The appropriate reset procedure
The Diagnostic Display is used to diagnose causes of a Lockout condition. See
3.2 Components
3.2.1 Models
An EZ-SCREEN LS Basic “System” refers to a compatible emitter and receiver of equal length and resolution (available in
pairs or separately) and their cordsets. Mounting hardware is ordered separately for each emitter and receiver. Special-
purpose mounting brackets are also available. Depending on the connection option, interfacing solutions include IM-T-..
modules, redundant positively guided contactors, safety modules/controllers, and muting modules.
The 13 mm (0.5 in) minimum bend radius for all cordset models accommodates low-clearance installations; cords can exit
to the left, right, or back of the sensor, when mounting. The pigtail QD option is useful for connection to splitter cables or
other QD cordsets.
Defined
Area
Test
RD Cordset
Emitter
Receiver
Status Indicators
visible on sensor face
Figure 1. EZ-SCREEN LS Basic System: Emitter, Receiver, Interconnecting
Cordsets
Euro QD Termination
Pigtail; requires mating QD
cordset for machine
connection
RD cordset with flying leads
Cable pivots as it exits
housing; bends to fit
against perpendicular
surfaces.
R 13 mm [0.5"]
min. bend
Figure 2. EZ-SCREEN LS Basic cordset options
EZ-SCREEN LS Basic Pair model numbers include the following items:
Qty
Description
1
EZ-SCREEN LS Basic Receiver
1
EZ-SCREEN LS Basic Emitter
EZ-SCREEN
®
LS Basic Safety Light Screen
www.bannerengineering.com - Tel: 763.544.3164
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