Connection of a deTec4 safety light curtain with an SP2 system plug to a RLY3-
OSSD2 safety relay. Muting with 2 photoelectric retro-reflective sensors (xxx-switch‐
ing). Operating mode: With restart interlock and external device monitoring.
•
Mode of operation
When the protective field is clear, the OSSD 1 and OSSD 2 outputs carry voltage.
The system can be switched on when K1 and K2 are in a fault-free de-energized
position. Lamp H2 flashes. The RLY3-OSSD2 is switched on by pressing S1 (push‐
button is pressed and released). The outputs (contacts 13-14 and 23-24) switch
the K1 and K2 contactors on. When the protective field is interrupted, the OSSD
1 and OSSD 2 outputs switch the RLY3-OSSD2 off. Contactors K1 and K2 are
switched off.
•
Muting and override
Muting starts when the protective field is clear and valid muting input conditions
apply. Muting lamp H1 signals the muting status. If a fault occurs when the
protective field is interrupted and at least one muting sensor is active, the safety
light curtain must be in the Override state. Pressing key-operated pushbutton S2
(pressing and releasing) initiates the Override state.
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.
In addition, the device must be checked for correct functioning after each change to the
configuration and each insertion of the system plug.
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 thorough check
Check during commissioning and modifications
Before commissioning the machine and after making changes, you must check whether
the safety functions are fulfilling their planned purpose and whether persons are being
adequately protected.
The thorough check is intended to ensure that the safety functions are fulfilling their
planned purpose and whether persons are being adequately protected.
The following points are often helpful for the definition of the check:
•
Does the check have to be completed by qualified safety personnel?
•
Can the check be completed by specially qualified and authorized personnel?
•
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 167
•
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 being secured have to be checked with a test rod? (
)
b
Define all guidelines for the check.
PROJECT PLANNING
4
8021645/1EB0/2022-04-28 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTec4
71
Subject to change without notice
