Inner limit switches
If an inner limit is activated the SPA3 system will perform a maximum movement de-acceleration in all axes to a stop and then perform a
controlled axis back-off in the opposite direction, as if a trigger event occurred.
Outer limit switches
If an outer limit is activated the SPA3 system will immediately disengage all servo power to the machine drives.
Recovery of this error is only possible by removing the outer limit switch activation (i.e. by moving the machine off of the switch).
0 V (24 V return)
This is the 0 V reference for all of the I/O signals.
SPA3 installation guide
www.renishaw.com
Issued 11 2020
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