6.3.1 Configuring the System for Initial Checkout
Verify that the emitter and receiver are both set to the factory defaults for initial checkout and optical alignment. Receiver
factory defaults are for trip output, reduced resolution Off, aux output, inverted display Off, and scan code 1. Emitter factory
defaults are for reset, fault output Off, inverted display Off, and scan code 1.
For the initial checkout, the EZ-SCREEN LPM System must be checked without power available to the guarded machine.
Final interface connections to the guarded machine cannot take place until the light screen system has been checked out.
This may require lockout/tagout procedures (refer to OSHA1910.147, ANSI Z244-1, ISO 14118, or the appropriate standard
for controlling hazardous energy). The OSSD connections will be made after the initial checkout procedure has been
successfully completed.
Verify that:
• Power has been removed from (or is not available to) the guarded machine and its controls or actuators
• The machine control circuit or the Safety/Interface Module is not connected to the OSSD outputs at this time
(permanent connections will be made later)
• EDM is configured for
no monitoring
(p. 45)
6.3.2 Initial Power-Up
1. Inspect the area near the light screen for reflective surfaces, including work pieces and the guarded machine.
Reflective surfaces may cause light beams to reflect around a person in the light screen, preventing the person from
being detected and not stopping the machine motion (see
2. Eliminate the reflective surfaces as much possible by relocating, painting, masking, or roughening them. Remaining
problem reflections will become apparent during the trip test.
3. Verify that power is removed from the EZ-SCREEN LPM System and from the guarded machine and that the OSSD
safety outputs are not connected.
4. Remove all obstructions from the light screen.
5. Leaving power to the guarded machine Off, make power and earth ground connections on both the emitter and
Generic Emitter Wiring Diagram
(p. 46)).
6. Power up the EZ-SCREEN LPM System only.
7. Verify that the input power is present to both the emitter and the receiver. At least one indicator on both the emitter
and the receiver should be On and the start-up sequence should cycle.
8. Watch both the emitter and the receiver Status indicators, 7-segment displays, and the receiver Zone indicators to
determine the light screen alignment status. Refer to
(p. 70). If in a lockout condition, proceed to
(p. 76). If not in a lockout condition, proceed to
• Lockout Condition—the emitter Status indicator is single-flashing Red; the receiver Status indicator is On
Red, and the 7-segment display reads CH1.
• Receiver Lockout Condition —the receiver Status indicator is single-flashing Red, with Zone and Reset
indicators Off; the receiver 7-segment display shows an Error Code.
• Normal Operating Mode (emitter)—The Status indicator is On Green.
• Receiver Latch Condition, all optical beams clear—the receiver Status indicator is On Red and the Reset
indicator double-flashing Yellow; Zone indicators On Green. When the receiver is configured for Latch
Output, the outputs are On only when all beams are clear and after a manual reset. If a reset routine can
cause a Clear (Run) condition, optimize the alignment as described in the following section. If a Clear (Run)
condition cannot be achieved, see “Blocked condition” below.
• Clear (Run) Condition (receiver)—The Status indicator is On Green (or flashing Green if reduced resolution is
enabled), and the Reset indicator is On Yellow. All Zone indicators are On Green.
• A Blocked Condition (receiver)—The Status indicator is On Red, the yellow Reset indicator is On, one or
more Zone indicator(s) are On Red, identifying the location of the blocked beams, and the number of
blocked beams is displayed. Proceed to
Note: If beam 1 is blocked, Zone indicator 1 is Red and all others are Off. Beam 1 provides the
synchronization signal.
Note: If the emitter Test input is open (when enabled), the receiver's 7-segment Display will indicate the
total number of beams in the system (minus one) and all Zone indicators will be Red.
(p. 71) for indicator and display information.
EZ-SCREEN Low-Profile System with Integral Muting
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