When the light path is clear, the H1 LED flashes. The system can be switched on
when K1 and K2 are in a fault-free de-energized position. The system is enabled
by pressing the ER12 pushbutton (pushbutton is pressed and released). Outputs
OSSD1 and OSSD2 carry voltage. The outputs (contacts 13-14 and 23-24) switch
the K1 and K2 contactors on. When the light path is interrupted, the OSSD1 and
OSSD2 outputs switch the RLY3-OSSD2 off. Contactors K1 and K2 are switched
off.
•
Muting and override
Muting starts when the light path is clear and valid muting input conditions apply.
Muting lamp H1 signals the muting status. If a fault occurs when the light path is
interrupted and at least one muting sensor is active, the protective device must be
in the override status. Override is initiated by pressing the ER12 pushbutton (push‐
button is pressed and released).
4.5
Testing plan
The manufacturer of the machine and the operating entity must define all required thor‐
ough checks. The definition must be based on the application conditions and the risk
assessment and must be documented in a traceable manner.
b
When defining the thorough check, please note the following:
°
Define the type and execution of the thorough check.
°
Define the frequency of the thorough check.
°
Notify the machine operators of the thorough check and instruct them
accordingly.
The following thorough checks are often defined in connection with a protective device:
•
Thorough check during commissioning and modifications
•
Regular thorough check
Thorough check during commissioning and modifications
The test is intended to ensure that the hazardous area is monitored by the protective
device and that unprotected access to the hazardous area is prevented.
The following points are often helpful for the definition of the thorough check:
•
Does the thorough check have to be completed by qualified safety personnel?
•
Can the thorough check be completed by personnel specially qualified and autho‐
rized to do so?
•
Does the thorough check have to be documented in a traceable manner?
•
Can the check be carried out according to a check list? (
commissioning and commissioning", page 104
•
Do the machine operators know the function of the protective device?
•
Have the machine operators been trained to work on the machine?
•
Have the machine operators been notified about modifications to the machine?
•
Does the hazardous area being secured have to be checked with a test rod? (
)
b
Define all guidelines for the thorough check.
Regular thorough check
The test is intended to ensure that the hazardous area is monitored by the protective
device and that unprotected access to the hazardous area is prevented.
The following points are often helpful for the definition of the thorough check:
•
Which thorough check must be carried out and how is it carried out?
°
°
"Visual check of the machine and the protective device", page 42
4
PROJECT PLANNING
40
O P E R A T I N G I N S T R U C T I O N S | deTem4 LT Muting A/P
8024802/2020-07-17 | SICK
Subject to change without notice