Transition Networks, Inc.
IONPS-D-R1 User Guide
33707 Rev. A
Page
8
of
50
Failover and Load Sharing
Load Sharing
is achieved when both Power Supplies are set to Primary.
Failover
is achieved when one Power Supply is set to Primary and the other is set to Secondary.
There are two modes for the IONPS-D-R1:
1.
If both are in Primary mode, both power supplies are in an un-balanced “Auctioneered” load share mode.
2.
If one is Primary and the other is Secondary, then they will work in an instant fail-over mode.
The new IONPS-D-R1 can be used in conjunction with the old
IONPS-A. The old IONPS-A will always set itself to
Primary when installed in Power Supply slot #1 (chassis slot #22). Likewise, the IONPS-A will always set itself to
Secondary when installed in Power Supply slot # 2 (Chassis slot # 23).
The table below shows how the two power supply modules can be configured and how they interact.
# Control
PS #1
PS #2
Function
1 User control
IONPS-A-R1
Primary/Secondary
IONPS-A-R1
Primary/Secondary
Instant Fail-over or loadshare based on
software configuration.
2 Automatic
IONPS-A
Primary
IONPS-A
Secondary
Instant Fail-over.
3 Automatic
IONPS-A
Primary
IONPS-A-R1
Primary
Un-balanced “Auctioneered” loadshare.
4 Automatic
IONPS-A-R1
Primary
IONPS-A-R1
Primary
Un-balanced “Auctioneered” loadshare,
but the IONPS-A will carry most of the
load.
The IONPS-D-R1 default setting is Primary mode. If you try to set both P/S #1 and P/S #2 are set to Secondary
mode, a warning message displays (a control system exist that prevents both modules from being set to
Secondary mode).
For redundant operation where two identical power supplies are connected in parallel, diode 'auctioneering'
modules are used to eliminate the possibility of a back feed from one power supply to the other, and to allow
power supply failure alarms to be operated.
Note that the IONPS-D-R1 can also be used with the DC power supply, IONPS-D.
Fan Speed
The IONPS-D-R1 fan control mode is pre-configured for “automatic” mode; the fan speed is controlled by PWM
according to a temperature sensor. The IONPS-D-R1 uses an intelligent temperature monitor and fan controller
in Auto Temperature-Fan mode. Auto Temperature-Fan mode is an intelligent, closed-loop control that
optimizes fan speed according to pre-defined parameters. This mode allows the IONPS-D-R1 to run as a stand-
alone device without intervention.
