3. Verify that power is removed from the S4B System and from the guarded machine and that the OSSD safety outputs
are not connected.
4. Remove all obstructions from the light screen.
5. With the power to the guarded machine off, c24 V DC (brown wire) and 0 V DC (blue wire) on both the
emitter and receiver cables to a SELV-rated power supply (see
6. Power up the S4B 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 and the receiver Zone indicators to determine the light
screen alignment status.
•
Emitter Lockout Condition
—the emitter's red Status indicator is single-flashing and the receiver's red Status
on page 42 for diagnostic information.
•
Receiver Lockout Condition
—the receiver Status indicator is single-flashing red. Proceed to
on page 42 for diagnostic information.
•
Normal Operating Mode
(emitter)—The green Status indicator is on.
•
Clear (Run) Condition
(receiver)—The green Status indicator is on. All green Zone indicators are on.
•
A Blocked Condition
(receiver)—The red Status indicator is on and one or more red Zone indicator(s) are on,
identifying the location of the blocked beams. Proceed to
Optically Align the System Components
on page 31.
Note:
If beam 1 is blocked, Zone indicator 1 is red and all others are off. Beam 1 provides the
synchronization signal.
See
on page 10 for indicator and display information.
6.4.3 Optically Align the System Components
To verify the optimal alignment, adjust the sensor rotation with the power on and follow these steps.
WARNING:
•
Hazard exposure
•
Failure to follow these instructions could result in serious injury or death.
•
Verify that no individuals are exposed to any hazard if the output signal switching device (OSSD)
outputs turn on when the emitter and receiver become aligned.
Before beginning, verify the sensor mounting.
1. Verify that the emitter and the receiver are pointed squarely at each other. The sensor face must be perpendicular to
the optical axis.
If the Channel #1 beam is not aligned, the Status and Zone 1 indicators are red and Zone indicators 2–3 are off.
2. If the green Status indicator is on, go to the next step. If not, rotate each sensor (one at a time) left and right until the
green Status indicator is on. (As the sensor rotates out of alignment, the red Status indicator turns on). As more
beams are aligned, the Zone indicators turn from red to green.
3. Optimize alignment and maximize excess gain.
S4B Safety Light Curtain
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