Task
•
Connection of a multiple light beam safety device deTem2 Core IP69K to a RLY3-
OSSD2 safety relay. Operating mode: With restart interlock and external device
monitoring.
Mode of operation
•
When the light path is clear, the OSSD1 and OSSD2 outputs carry voltage. The sys‐
tem can be switched on when K1 and K2 are in a fault-free de-energized position.
The RLY3-OSSD2 is switched on by pressing S1 (pushbutton is pressed and
released). The outputs (contacts 13-14 and 23-24) switch the K1 and K2 contac‐
tors on. When the light path is interrupted, the OSSD1 and OSSD2 outputs switch
the RLY3-OSSD2 off. Contactors K1 and K2 are switched off.
Fault analysis
•
Cross-circuits and short-circuits of the OSSDs are recognized and lead to the lock‐
ing status (lock-out). A malfunction with one of the K1 or K2 contactors is
detected. The switch-off function is retained. In the event of manipulation (e.g.,
jamming) of the S1 pushbutton, the RLY3-OSSD2 will not re-enable the output cur‐
rent circuits.
4.5
Testing plan
The manufacturer of the machine and the operating entity must define all required
checks. The definition must be based on the application conditions and the risk assess‐
ment and must be documented in a traceable manner.
b
When defining the check, please note the following:
°
Define the type and execution of the check.
°
Define the frequency of the check.
°
Notify the machine operators of the check and instruct them accordingly.
The following checks are often defined in connection with a protective device:
•
Check during commissioning and modifications
•
Regular check
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 check:
•
Does the check have to be completed by quality safety personnel?
•
Can the thorough check be completed by personnel specially qualified and autho‐
rized to do so?
•
Does the check have to be documented in a traceable manner?
•
Can the check be carried out according to a check list (
commissioning and commissioning", page 63
•
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 on the machine?
•
Does the hazardous area to be secured have to be checked with a test rod,
?
b
Define all guidelines for the check.
Regular 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 check:
•
Which check must be carried out and how is it carried out?
4
PROJECT PLANNING
24
O P E R A T I N G I N S T R U C T I O N S | deTem2 Core IP69K
8021554/14Q7/2020-04-27 | SICK
Subject to change without notice