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May 22, 2023
EZ-SCREEN SLS Safety Light Curtain Instruction Manual
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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 Des-
ignated 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 safe-
guarded area unnoticed may create a hazardous situation.
Reset Routine —The EZ-SCREEN SLS requires a manual reset to clear a Power-Up Lockout or Latch condition, and after the
cause of a Lockout condition is corrected. This function is designed to provide a monitored manual reset (that is, an open-
closed-open action), such that a shorted or tied-down button cannot cause a reset. When a key-operated switch is used, it is
typically called a key reset.
To perform a manual reset, close the normally open switch for at least 0.25 second, but no longer than 2 seconds, and then
re-open the switch.
A Lockout condition causes the EZ-SCREEN SLS OSSD outputs to turn Off. A Lockout condition is indicated by a flashing
red emitter or receiver Status indicator and an error number displayed on the Diagnostic Display. Internal Lockout conditions
require a manual reset routine to return the System to Run mode after the failure has been corrected and the input has been
correctly cycled. A description of possible lockouts, their causes, and troubleshooting hints are listed in "Troubleshooting" on
page 85 .
Trip Output/Auto Reset —While the use of a reset switch is recommended, it is not required for EZ-SCREEN SLS receivers
that are configured for Trip Output (automatic reset). Cycling the supply power (Off for > 2 seconds, then On) also clears lock-
outs if their cause has been corrected. If a reset switch is not used, leave pin 8 (violet wire) not connected (open) and secure
it against shorting to a source of power or ground.
The EZ-SCREEN SLS receiver has a Reset input, pin 8 (Violet wire), that allows the System to be manually reset.
The EZ-SCREEN SLS requires a manual reset to clear a Latch condition and resume operation following a stop command.
Internal Lockout conditions also require a manual reset to return the System to Run mode after the failure has been corrected
and the input correctly cycled.
Receiver manual resets are required in the following situations:
Trip Output operation—only after a System Lockout
Latch Output operation—at power-up, after each Latch condition occurs, and after a System Lockout
To reset the receiver:
IMPORTANT: Closing the reset switch too long causes the System to ignore the reset request. The switch
must be closed from 1/4 second to 2 seconds, but no longer.
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.
Status indicators on both the emitter and receiver are clearly visible on each sensor’s front panel.
Manual Resets and Lockout Conditions
6.3.1
Resetting the Receiver
6.3.2
Close the reset switch for 1/4 to 2 seconds. (If the reset switch model MGA-KS0-1 is used, turn the key 1/4 turn clock-
wise to close.) 1.
Open the switch. (If the reset switch model MGA-KS0-1 is used, turn the key counterclockwise, back to its original po-
sition, to open.)
2.
Resetting the Emitter
6.3.3
Status Indicators
6.4
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