IBM 560 - Manual (Page 20)

Output Protection
A short circuit placed on any dc output (between outputs or between
an output and a dc return) latches all dc outputs into a shutdown
state, with no hazardous condition to the power supply.
If an overvoltage fault occurs in the power supply, the power supply
latches all dc outputs into a shutdown state before any output
exceeds 135% of the nominal value of the power supply.
Voltage Sequencing
When power is turned on, the output voltages reach their operational
voltages within 2 seconds.
Power Supply Connector
The following connector is used with the AC Adapter. The total
power capacity of this connector must not exceed 4.0 A.
1
2
Refer to Figure 1-9 for the appropriate adapter pin assignments.
Figure 1-9. Voltage Pin Assignments for 35W AC Adapter
Pin Voltage
1 + 7.0 V dc to + 16.0 V dc (depending on charging conditions)
2 Ground
1-12 ThinkPad 560/560E System Overview