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2 Operational Safety User Manual HS-50 2.5 Energy state of t he placement system after switching off at t he main switch Software-Version 5.01 Edition 01/99 78   0DLQ V ZLWFK VZLWFKHG RII SODFHPHQWV\VWHP GL…

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User Manual HS-50 2 Operational Safety
Software-Version 5.01Edition 01/99 2.5 Energy state of the placement system after switching off at the main switch
77
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The following table shows the voltages of the individual modules when the main switch is switched
off, but the placement system is still connected to the main power supply.
DANGER
The following components still carry potentially lethal voltages even if the main switch is switched
off:
– cable connection terminals 1, 3, and 5 of S1 main switch
– Z1 main power filter
– BU1 service socket
– F1 automatic circuit breaker for the service socket
– The color of all individual wires, which still carry potentially lethal voltages even if the main
switch is switched off is brown.
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Z1 main power filter
Cable connection terminals L1, L2, L3
3 x 204 VAC
3 x 400 VAC
3 x 460 VAC
BU1 service socket
115 VAC
230 VAC
265 VAC
F1 automatic circuit breaker
115 VAC
230 VAC
265 VAC
S1 main switch
Cable connection terminals 1, 3, 5
3 x 204 VAC
3 x 400 VAC
3 x 460 VAC
Servo unit (see item 5 of diagram)
Test socket X2
Test socket X3
Test socket X4
GND X1
< 10 VDC
< 10 VDC
< 10 VDC
2 Operational Safety User Manual HS-50
2.5 Energy state of the placement system after switching off at the main switch Software-Version 5.01 Edition 01/99
78
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The placement system is de-energized, apart from slight residual voltages in the servo unit.
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When the placement system is switched off at the main switch (item 1 in the diagram) or the power
supply to the placement system fails, the electrically-controlled main valve Y1 shuts off the com-
pressed air unit (item 3 in the diagram). The pressure drops to 0 bar within 5 seconds.
Control unit (see items 3, 4, 5 and 6)
Test socket + 12 VDC (x3ta)
Test socket - 12 VDC (x4ta)
Test socket + 15 VDC (x3tb)
Test socket -15 VDC (x4tb)
Test socket + 5 VDC (x3td)
Test socket + 24 VDC (x4td)
Test socket + 50 VDC (x5te)
Test socket + 5 VDC (x4te)
GND (x3td)
0 VDC
0 VDC
0 VDC
0 VDC
0 VDC
0 VDC
0 VDC
0 VDC
User Manual HS-50 2 Operational Safety
Software-Version 5.01Edition 01/99 2.6 Lock out and tag out procedure when performing any maintenance work or service work
79
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Before performing any maintenance work or service work, a procedure of locking and tagging
must be followed. The procedure, when followed correctly eliminates the possibility of an em-
ployee being injured.
NOTE
These procedures represent the minimum lock/tag out requirements. Any additional safe-guards
needed to complete work safely can be specified by facilities supervision, the safety officer, the
safety committee and the health department.
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Whenever it becomes necessary to isolate, control and release energy, the following procedure is
to be followed
1. Notify affected employees.
2. Shut down equipment, using normal stopping procedures, such as
– depressing the stop button
– shutting down the station computer or
– switching off the placement system at the main switch.
3. Isolate the equipment from all its energy sources such as
– compressed air supply and
– power supply.
4. Lock Out equipment.
– Apply the lock and the lockout whenever possible.