C.A A Look under the Hood
The Extended Safety Interlock is nothing else, than the access to the internal safety interlock
of TR-MARK III. An open external interlock line will have the same effect to the device as a
pressed emergency switch. Please see the following schematic as an additional explanation:
Of course, when using an 70049-A device that is not connected to en external interlock line,
the use of a dummy plug is necessary.
C.B Dummy Plug – Use without external Interlock
As visible in ‘C.A A Look under the Hood’, the Extended Safety Interlock has to be bridged
when it is not used. Other vice TR-MARK III will show the ‘emergency pressed’ message and
remain in a safe mode.
The Dummy Plug shown below is delivered with every Extended Safety Interlock option.
90100.2.10 Instruction Manual TR-MARK III
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