Renishaw apply innovation SPA2, Installation Manual

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Interconnection schemes 35
6.4.2 Emergency stop and reset switch
The SPA 2 and UCC 2 or UCC lite control system is capable of providing category 2 * emergency stop
system safety level. However, this is subject to the machine manufacturers / installers method of
integration and their risk assessment.
Each machine integration kit contains one 9-way D-type connector which permits the installer to add
additional emergency stop devices to the emergency stop system integrated within the SPA 2 .
NOTE: Emergency stop switches (where required by the manufacturer or installer's risk assessment)
must comply with the requirements of standards UL1054/EN60947.
This connector is of the solder bucket variety, it is recommended that they are fitted to the CMM wiring by
a competent technician or engineer, and that sleeving is used for all connections to reduce the possibility
of unintentional short circuits.
* Category 2 to EN954-1:1996 (ISO13849-1:1999).