Transition Networks, Inc.
IONPS-D-R1 User Guide
33707 Rev. A
Page
19
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50
Figure 7: Power Module Installation
8. Secure the power module to the chassis with the two 6-32 Philips head screws.
9. Switch main power source ON — the LED on the redundant module should be lit.
Power Module Redundancy
The IONPS-D-R1, DC Power Module includes Instant failover (IFO) circuitry that provides the capability for the
primary Power Module to power the chassis backplane while the Secondary Power Module is in ‘hot’ standby
mode. If the IFO circuitry detects the loss of primary power, the Secondary Power Module instantly provides
power to the chassis backplane. When primary power is restored, the IFO circuitry places the Secondary Power
Module in ‘hot’ standby mode. The chassis primary Power Module is located in the left slot of the chassis as
viewed from the rear. The chassis Secondary Power Module is located in the right slot of the chassis as viewed
from the rear.
A single Power Module installed in either bay can power the chassis backplane.
The IONPS-D-R1 Power supplies provide failover and load sharing. See
on page
