Machine I/O

The 44-way (high density) socket provides connection for the CMM I/O.
The table below details the I/O pinout:

+24V DC

 +24 V DC limited to 1 A.

Air

Pin 2 will be be set low (to energise the air solenoid) on bootup and subsequently, provided there is no air failure. They will be set high on thIs transistor output signal active low controlled by the “engage command”.

Brakes

During the commissioning process it is possible to invert the output from the brake connections from an active low signal to an active high.

General purpose output

It is an open collector pulled down to the 0 V (24 V return) line via an NPN transistor when activated. It is suitable for driving devices in the range 5 to 24 V with a maximum output current of 200 mA. If the output is not required then it should be left open circuit. The output is protected for excess voltage and over current within the controller.

Switched inputs

Two uncommitted inputs are provided. Each input is activated by being pulled down to the 0 V (24 V return line). The inputs are not opto isolated and are pulled up to 24 V via a 10 kohm resistor. These inputs can accept signal levels in the range of +5 V to +48 V, and need to be pulled below 1 V to signify a change in state.

De-clutch

Not supported.

Low air pressure

The low air pressure signal should be connected to a suitable air pressure switch.This input is monitored by the controller and when activated will remove power from the motors by causing a system fatal fault. During the commissioning process it is possible to invert this signal from an active low signal to an active high. If this capability is not required for integration to the system then it should be connected to the 0 V (24 V return line).

Crash

The crash signal is used to inform the UCCFusion of a collision of the mechanical structure of the machine. Typically this is a sensor that is fitted to the end of the CMM quill and if activated will remove power from the motors by causing a system fatal fault.

During the commissioning process it is possible to invert this signal from an active low signal to an active high. If this capability is not required for integration to the system then it should be connected to the 0V (24V return line).

Limit switches

The UCCFusion controller supports both inner and outer limit switches for all directions of machine axes. During the commissioning process it is possible to invert this signal from an active low signal to an active high. If this capability is not required for integration to the system then it should be connected to the 0 V (24 V return line).

Inner limit switches

If an inner limit is activated the UCCFusion 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 UCCFusion 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.

0V (24 V return)

This is the 0 V reference for all of the I / O signals.