Hardware 2-13
Octel 200/300 S.4.1PB60019−01

Differences between earlier and current Octel 200 PSUs

Current AC PSU Earlier AC PSU
Fuse: 6.3 Amp, 250V, slow blow, 5x20mm.
Mounted on front of PSU
Autoranging: accepts AC input voltage
from 100 VACto 240 VAC.
Supports nominal AC input frequencies
of 50/60 Hz (50/60 cycles per second).
Power factor corrected to meet Euro-
pean harmonic distortion requirements.
Approved for worldwide usage.
Domestic Fuse: 10 Amp
International Fuse: 5 Amp
Mounted on front of PSU
No Autoranging.
Different units are used for different input
voltages
Octel 300 Power Supply
The Octel 300 PSU is located in slot A15.
The PSU provides the message server reset signal. This signal is activated at power up and resets all
boards in the message server. The PSU provides a protective circuit breaker for primary power. This
circuit breaker also acts as the message server power switch. The circuit breaker is tripped for primary
overcurrent, power supply overtemperature, and secondary overvoltage. When the circuit breaker is
tripped the ON/OFF switch is set to the OFF position.
The +5-volt PSU is sensed at the center of the shelf Amotherboard. The +12-volt fan and drive
motor power is sensed at the SCSI motherboard B and SCSI motherboard C. Each regulated voltage
of the PSU includes overvoltage and overcurrent. The PSU also includes overtemperature protection.
In the case of an overtemperature occurrence, the circuit breaker opens.
The message server input voltage is displayed on the power line filter box at the rear of the cabinet.

Differences between earlier and current Octel 300 PSUs

Current AC PSU Earlier AC PSU
Anew 100−240 VACpower filter assembly
is required when the new 100−240 VAC
PSU is used.
Autoranging; accepts AC input voltage
from 100 VACto 240 VAC.
Supports nominal AC input frequencies
of 50/60 Hz (50/60 cycles per second).
Power factor corrected to meet Euro-
pean harmonic distortion requirements.
Approved for worldwide usage.
TheAC power filter assemblies are differentde-
pending on AC input voltage. The types are:
120 VAC,240 VAC, and -48 VDC.
No Autoranging.
Different units are used for different input
voltages.
Refer to the Installation chapter,Installation Requirements section, for instructions on installing a
–48 VDC powered PSU. Refer to the Hardware Replacement chapters, Power Supply Unit section,
for instructions about removing and installing a PSU.
Refer to Chapter 9 for more information about the PSUs.