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Application guide for some standard applications

  • Single isolation/Single Access
  • Single Isolation/Delayed Single Access
  • Single Isolation/Multiple Access
  • Single Isolation/Interactive Access
  • Multiple Sequential Isolation/Single Access
  • Multiple Isolation/Multiple Access
  • Power Isolation/Delayed Access
  • Locks for electrical Distribution system

Single isolation/Single Access


Application

Simple machine or enclosure which has one isolator and one access point.

Operating Sequence
  • Power ON, key A trapped in isolator, Guard locked closed
  • Power OFF, KEY A free, Guard locked closed
  • Power OFF/ Guard open, key A trapped in guard door


RECOMMENDED LOCK TYPE
ILE, ILD / ILH – 100

Single Isolation/Delayed Single Access


Application

Machine with a run-down time requirement or one which cannot be stopped half way through the cycle.

Operating Sequence
  • Power ON, machine operating, Key A trapped at machine power supply, Guard locked closed
  • Power OFF, machine stopping, key A trapped at machine supply, timer ON, Guard locked closed
  • Power OFF, machine stopped, key A free / Guard locked closed
  • Power OFF, machine stopped / Guard open, key A trapped in guard door.


RECOMMENDED LOCK TYPES :
ILT, ILD / ILH – 100

Single Isolation/Multiple Access


Application

Machine which has more than one access point, Eg: Electrostatic Precipitators

Operating Sequence
  • Power ON, Key A trapped in Main source of supply, access Keys B, C & D trapped in Key Exchange/guards locked closed.
  • Power OFF Key A free, access Keys B, C & D trapped in Key Exchange/guards locked closed.
  • Power OFF/ Control Key A trapped in Key Exchange access Keys B, C & D released/Guards locked closed.
  • Power OFF/ Control Key A trapped in Key Exchange Guards open, access Keys B, C & D trapped in guard doors.


RECOMMENDED LOCK TYPES :
ILE, ILD/ILH-100, ILS-100,ILG-100

Single Isolation/Interactive Access


Application

Machine where there is danger of personnel being trapped inside the machine.

Operating Sequence
  • Power ON, Key A trapped in Main source of supply Guard locked closed, personnel key B trapped in guard door.
  • Power OFF, key A free, Guard locked closed, personnel Key B trapped in guard door.
  • Power OFF, key A trapped, guard released, personnel Key B trapped in guard door.
  • Power OFF, Key A trapped, guard open, personnel key B free.


RECOMMENDED LOCK TYPES :
ILE, ILH – 200, ILG – 200

Multiple Sequential Isolation/Single Access


Application

Machine that requires a sequential action to ensure isolation – Power OFF Earth Switch ON, Guard open

Operating Sequence
  • Power ON, Key A trapped in Switch gear, Earth Switch Open. Access key B trapped at earth switch/ Guard locked closed.
  • Power OFF, key A released / Earth Switch OPEN. Access Keys B trapped / guard locked closed.
  • Power OFF, key A trapped in Earth Switch, Earth Switch CLOSED, key B free/ guard locked closed.
  • Power OFF, Key A trapped Earth Switch CLOSED/ Guard open, key B trapped in guard.


RECOMMENDED LOCK TYPES : ILA, ILA-200, ILD/ILH - 100

Multiple Isolation/Multiple Access


Application

Machine which has a number of power sources and many access points.

Operating Sequence
  • Power ON, Keys A1, A2, A3 trapped at power supply, Access Keys B1, B2, C1, C2, D1, D2 trapped in key exchange/ Guards locked closed.
  • Power OFF, key A1, A2, A3, free/ access keys B1, B2, C1, C2, D1, D2 trapped in key exchange/guards locked closed.
  • Power OFF, keys A1, A2, A3 trapped in Key Exchange, access Keys B1, B2, C1, C2, D1, D2 free/guards locked closed.
  • Power OFF, Keys A1, A2, A3 trapped in Key Exchange, guards open, Keys B1, B2, C1, C2, D1, D2 trapped in respective guard doors.


RECOMMENDED LOCK TYPES : ILE, ILX – 100, ILD / ILH 100

Power Isolation/Delayed Access


Application

Multiple operation programmable Robot controlled machines with guards.

Operating Sequence
  • Power ON, Key A trapped at power supply / Guard locked closed, Key B trapped in inter active control box – Machine/ Robot in normal operation mode.
  • At end of cycle, Switch Power off, Key A free. Insert key A in interactive control Box & Trap Key A.
  • Key A trapped n interactive control box. Key B released after end of cycle or preset time delay.
  • Release Key-B Insert in guard lock & strap.
  • Key B trapped in Guard Door lock. Guard open.


RECOMMENDED LOCK TYPES : ILT, ILD / ILH – 100

Locks for electrical Distribution system


Three sources of supply feeding 3 separate loads

Application
  • Supplies are not to be paralleled at any time.
  • Each source must be able to supply any two loads, if required.
Conditions
  • Key AA will operate locks AA or A- only
  • Key BB will operate locks BB or -B only
  • Key AA will operate A-, -B, or AB


RECOMMENDED LOCK TYPES : ILA, ILB WITH SUITABLE ACCESSORIES