Renishaw UCC T3 Guia De Instalacion página 28

UCC T3 installation guide
www.renishaw.com
+24 Vdc
+24 Vdc limited to 1 A.
Air
Pin 2 will be be set low (to energise the air solenoid) on boot-up 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
This 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 V 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
This input on pin 20 should normally be pulled down to the 24 V return line, 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 a CMM
has been temporarily 'de‐clutched' from its 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 position when the signal again goes low.
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 UCC T3 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 0 V (24 V return line).
Issued 04 2019
28