Safety Instructions-Maintenance; Daily Inspection - Allen-Bradley GuardShield 440L-T2KA series Installation Instructions Manual

GuardShield Type 2 Safety Light Curtain
Condition No.
1 Guard only mode, light curtain unobstructed (aligned, not in interlock)
2 Guard only mode, light curtain interrupted (aligned, not in interlock)
3 Guard only mode, misaligned (not in interlock)
4 Restart interlock (aligned)
5 Transmitter test input active (pin 4)
6 Internal fault, receiver
7 Internal fault, transmitter
8 External fault (OSSD short to ground, +V, or cross connection)
9 External fault (MPCE/EDM error)
Note: For fault conditions 6 through 9, see Troubleshooting guide
on page 10.
Assure that all power to the machine, and safety system is
disconnected during electrical installation.
IMPORTANT Before powering up the GuardShield™ Type 2 system, the
responsible person must review the following Checklist.
Checklist
Before the initiation of the GuardShield™ Type 2, the responsible
person must work through the following checklist.
Cable check before initiation:
1. The power supply is a 24V DC device, which must comply to all
applicable standards of the Machinery Directive 2006/42/EC,
and the product standard (IEC 61496).
2. Proper polarity of the power supply at the GuardShield™ Type 2.
3. The transmitter connection cable is properly connected to the
transmitter, the receiver connection cable is properly connected
to the receiver.
4. The double insulation between the light curtain output and an
external potential is confirmed.
5. The OSSD outputs are not connected to +24V DC.
6. The connected switching elements (load) are not connected to
24V DC.
7. No connection to a conventional power supply.
8. If two or more GuardShield™ Type 2 are to be used, make sure
that each system is properly installed, to avoid optical
interference.
Switch on the GuardShield™ Type 2 and check its function by observing
the following:
9. Two seconds after switching on, the system starts to work
properly, if the protective field is free of obstructions.
12
Safety Instructions—Maintenance
Note:
1.
2.
3.

Daily Inspection

1.
2.
3.
4.
Operate the machine and check, if the hazardous movement stops
under the following circumstances.
5.
6.
7.
8.
9.
Rockwell Automation Publication 440L-IN011B-EN-P - October 2017
Description
ATTENTION: Never operate the GuardShield™ Type 2 before
conducting the following inspection. Improper inspection can lead to
serious or even deadly injury.
For safety reasons, all inspection results are recorded.
The inspection is performed only by persons who clearly
understand the functioning of the GuardShield™ Type 2 and of
the machine.
To perform the inspection, make sure that the user has sufficient
information.
Approach to hazardous machine parts must only be possible
through passage through the protective field of GuardShield™
Type 2.
Operators cannot step through the sensing area while working
on dangerous machine parts.
The safety distance of the application is bigger than the
calculated value.
The optic front cover is not scratched or dirty.
The protective field is interrupted.
Hazardous machine movement stops immediately, if the
protective field is interrupted by the test rod:
• directly in front of the transmitter,
• directly in front of the receiver, and
• in the middle between transmitter and receiver.
No hazardous machine movement while the test rod is
anywhere within the protective field.
The power supply of the GuardShield™ Type 2 is turned off.
If the blanking function is activated, check all sections of the
protective field with the appropriate test piece.