Using a se24 V PSU
If higher current is required to supply machine solenoids, relays or limit switches then a separate PSU can be connected.
The following circuit shows how an external PSU is connected to the SPA3-2 for correct operation.
CAUTION:
Flyback diodes must be directly fitted to all solenoids and relays when using an external PSU.
Enable air solenoid
An active low signal to engage an air solenoid.
Brake
These outputs (pins 3, 4, 5 and 38) are used to released the CMM axis brakes if fitted. These outputs become low to release the brakes as soon
as the CMM servos are engaged.
Uncommitted outputs
These output pins can be configured to the customer's requirements via the UCCsuite software.
Uncommitted inputs
These input pins can be configured to the customer's requirements via the UCCsuite software.
De-clutch
This input on pin 20 should be pulled 'low' to signal to the controller that the CMM's drives are mechanically connected to the moving
elements of the machine (i.e. in their normal condition). The input should be open circuit, or held 'high', when the CMM has been temporarily
'de-clutched' from the drive motors to allow manual positioning. The servo system will not drive the motors in this condition and will resume
control at the machine's current position when the signal goes 'low'. If this capability is not required the signal should be connected to 0 V or
inverted during commissioning.
SPA3-2 installation guide
www.renishaw.com
Issued 08 2020
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