Control Signals; Table C-9 Power Supply Control Signal; C.2.1 Control Signals - Sun Microsystems Ultra 60 Service Manual

TABLE C-8
Output
3
4
5
Note – The combined power of output 1 and output 3 must be less than 300 watts.
C.2.1

Control Signals

With the exception of the PowerOn signal, all power supply control signals are at
TTL signal levels.
TABLE C-9
Parameter
V (high-level output voltage)
OH
V (low-level output voltage)
OL
V (high-level input voltage)
IH
V (low-level input voltage)
IL
C.2.1.1 Remote Enable PowerOn and PowerOff
A remote interface can disable the DC outputs with a momentary low signal to the
PowerOff input and enable the DC outputs with a momentary low signal to the
PowerOn input. Both signals are interfaced to the power supply through the
motherboard.
C.2.1.2 On/Off Functionality
The system unit uses a latching relay to remember the state of the power supply.
This system uses a momentary On/Off switch and enables other parts of the system
(such as software or the keyboard switch) to control the state of power supply.
Power Supply Output Values (Continued)
Voltage (Vdc)
12.0
-12.0
2.5 to 3.5
lists these control signal values.
TABLE C-9
Power Supply Control Signal
Max Current (A) Regulation Band
6.0 11.65 to 12.60
0.4 -12.60 to -11.40
25.0 +/- 2%
Min
2.4 Vdc
2.0 Vdc
Appendix C Functional Description
Max
0.4 Vdc
0.8 Vdc
C-37