17
Reserved
"Reserved"
18
Reserved
"Reserved"
19
Reserved
"Reserved"
20
Reserved
"Reserved"
21
Enable amps (active high)
Command to SPA to enable
amplifiers (active high)
"Enable amps"
22
Contactor feedback
Confirmation of contactor
operation
"Contactor feedback"
23
Amps OK
Confirmation from the servo
amplifiers that they are ready
"AMPs OK"
24
E-STOP tripped
Indication from the SPA that the
ESTOP signal is asserted
"E-STOP tripped"
25
24 V return
Common reference line for
supply and contactor signals
"0 V (24 V return)"
Shell
Screen
+24 Vdc
+24 Vdc supply provided for the use of contactors, relays and other motor control circuits. Current limit 1 A.
Contactor
This command is issued by the UCC2, to the SPA, to engage the motor contactor. This output signal can drive the contactor directly providing
its current consumption is within the output specification. This output signal is available in both an active low on pin 2 and an active high on
pin 5.
E-STOP_C
This is the E-STOP reset line from the servo power amplifier. It is made available to the UCC2 plug in daughter-card slots for incorporation by
products that need to be aware or pass on this signal's status. It is part of the “category 2” E‐STOP system supported by the UCC2 and SPA2
controller system.
Enable amps
This is a command from the UCC2 to the SPA requesting it to enable its amplifiers. This output signal is provided as both an active low signal
on pin 4 and as an active high signal on pin 21.
E-STOP_A and E-STOP_B
These are the connections from the SPA E-STOP system to the joystick / MCU mounted emergency stop switch. E-STOP_A is the high end and
E-STOP_B is the return. The E-STOP_B signal is also made available to the UCC2 plug in daughter-card slots for incorporation by products that
need to be aware or pass on this signal's status. A rotary table is a good example of where it needs to be incorporated as part of the E-STOP
system.
Axis command signals
These outputs (pins 8 to 15) are the velocity demand signals for each axis from the UCC2 to the servo power amplifiers. They vary over the
range +10 V to –10 V.
UCC2 and UCC2-2 installation guide
www.renishaw.com
Issued 07 2021
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