Continuum Power Supply Reference
13
5
4
3
2
1
Output Power Connection
The power output connector is a five pin male assembly that is designed to easily
insert directly into the left side (input) connector of any CPU or I/O module. The
signals within that connector are as follows:
PIN Function
5 +VDC
4 VDC Return
3 No Connection
2 Low Battery *
1 AC Power *
* Only on PS 120/240 AC 50-U and AC 85-U
All the Continuum power supply modules (except the AC 25 model) generate a +24
VDC source for all other modules in the system. The PS 120/240 AC 25 power
supply generates +5 VDC. This power source is located on pins 4 and 5.
The UPS versions of these supplies include two power status signals on pins 1 and
2. Their function is as follows:
AC Power is a logic signal that is intended to communicate to an attached CPU
module that AC power is available. When AC is interrupted and the power supply
has switched to UPS battery mode, this signal presents a logic low to the CPU. The
CPU can use this signal to start an orderly system shutdown. For more information
on the use of this signal refer to the Continuum CPU Reference #30-3001-703.
Low Battery is a logic signal that is intended to communicate to an attached CPU
module that the voltage of the battery has dropped below 22 Volts. When the
power supply is in UPS battery mode, this signal presents a logic high to the CPU.
Should the battery voltage drop, this signal switches to a logic low. The CPU uses
this signal to start an orderly system shutdown. For more information on the use of
this signal refer to the Continuum CPU Reference #30-3001-703.
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