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User Manual SIPLAC E CS 2 Operational safety Software Vers ion SR.408.xx 03/2006 U S Edition 2.9 Lock out and tag out procedure 55 2.9 Lock out and t ag out procedure 2.9.1 Purpose and scope Before per formin g any preve…
2 Operational safety User Manual SIPLACE CS
2.8 Energy state of the machine after switching off at the main switch Software Version SR.408.xx03/2006 US Edition
54
2.8.1 Placement system switched off at the main power switch, but still
connected ...
The following table specifies the voltages of modules when the automatic placement system is
switched off at the main switch, but still connected to the mains supply.
2
2.8.2 Placement system switched off at the main power switch and
disconnected ...
The automatic placement system is unpowered, apart from slight residual voltages in the servo
unit.
2.8.3 Compressed air conditions in the machine after switching off at the main
power switch
When the system is switched off at the main power switch (item 1 in Fig. 2.8 - 1) or if the power
supply fails, the electrically-controlled main valve Y1 of the compressed air unit closes (Fig. 2.7 -
1, page 51 ). The pressure will drop to 0 MPa (0 bar) within 5 seconds.
Assembly Voltage
Main power filter Z1
Terminals L1, L2, L3
3 x 400 VAC (3 x 208 VAC)
Service socket
230 VAC (115 VAC)
Main switch Q1
Terminals L1, L2, L3
Terminals T1, T2,T3
3 x 400 VAC (3 x 208 VAC)
0 VAC
Servo unit (item 7 in Fig. 2.8 - 1
)
Test socket 001
Test socket 002
Test socket 003
Test socket 004
Test socket 005
Test socket 006
Test socket 008
Test socket 009
GND 007
< 12 VDC
< 12 VDC
< 12 VDC
0 VDC
0 VDC
0 VDC
< 12 VDC
< 12 VDC
Control unit (item 6 in Fig. 2.8 - 1
)
Test socket 5 V
Test socket + 12 V
Test socket – 12 V
Test socket + 15 V
Test socket – 15 V
Test socket + 24 V
GND
0 VDC
0 VDC
0 VDC
0 VDC
0 VDC
0 VDC
Tab. 2.8 - 1 Voltages of assemblies when the automatic placement system is switched off at the main switch,
but still connected to the main power
User Manual SIPLACE CS 2 Operational safety
Software Version SR.408.xx 03/2006 US Edition 2.9 Lock out and tag out procedure
55
2.9 Lock out and tag out procedure
2.9.1 Purpose and scope
Before performing any preventive maintenance work or service work, a procedure of locking and
tagging must be followed. The procedure, when followed correctly eliminates the possibility of an
employee being injured.
NOTE:
These procedures represent the minimum lock/tag out requirements for maintenance and servic-
ing work. Any additional safeguards needed to complete work safely can be specified by facilities
supervision, the safety officer, the safety committee and the health department. 2
2.9.2 Description
Whenever it becomes necessary to isolate, control and release energy, the following procedure
is to be followed
Æ Notify affected employees.
Æ Shut down the equipment. Carry out all normal stopping procedures:
– Press the stop button.
– Shut down the station computer.
– Switch the placement machine off at the main power switch.
Æ Isolate the machine from all its energy sources:
– Shut off the compressed air supply
– Shut off the main power supply
Æ Lock out the machine.
– Apply the lock and the lockout whenever possible.
–
The tag out alternative:
If a machine can be locked out, it must be. However, there are situations where energy
isolating devices cannot accommodate locks. In these cases, the energy isolating devices
must be tagged to warn employees that the machine is de-energized for servicing. The
tag must be securely fastened, it must be placed in a position visible to all and it may only
be removed by the person who attached it.
2 Operational safety User Manual SIPLACE CS
2.9 Lock out and tag out procedure Software Version SR.408.xx03/2006 US Edition
56
Æ Relieve stored energy Stored energy in the compressed air supply or electrical energy in elec-
trolytic capacitors must be released by appropriate means.
– After switching off the placement machine wait until the voltages and the compressed air
have discharged to be able work without any risk (see sections 2.6
and 2.7.
Æ Verify the lock out.
– Testing the lock out can be done simply by pressing the start button.
Æ The following steps must be taken to restore the machine to operation.
Æ Check the area. Authorized employees should remove all of their tools and reinstall all guards.
Æ Notify all affected employees. Before removing even one lock or tag, inform all workers in the
area that the machine is going to be restarted.
Æ Remove locks/tags Each authorized employee must remove his or her own lock. Each autho-
rized employee will have his or her own lock.
Æ Turn the machine on. Authorized workers should observe the equipment in operation to insure
repairs were done correctly.
2.9.3 Testing
The maintenance or electrical person may test the circuits by energizing the circuit for a short
period of time without voiding the lock out procedure provided. This may be done only when no
other work is being performed by any other person on the equipment being tested.
It is extremely important that all remote start switches be tagged with the “Do Not Operate” tag to
prevent inadvertent operation of the equipment during these periods.