Crystal Vision
Introduction
Indigo PSU Manual R1.1
2
16/06/2010
1 Introduction
The Indigo range comprises of four frame types, 4U frames for up to 24 modules, 2U
frames for up to 12 modules, 1U frames for up to 6 modules and a 1U Desktop Box for up
to 2 modules. Each frame type has several front panel variants, being, either a passive
front panel, an active panel with controls and a display or a Statesman-enabled version
without controls or a display. Apart from the Indigo DT Desktop box, all the Indigo range
of frames has plug-in PSU modules.
This manual is about the plug-in Indigo PSU modules fitted to 4U, 2U and 1U frames.
The Indigo range of plug-in PSU module are available in power outputs of, 75 watt (PSU-
75i), 150 watt (PSU-150i), 160 watt (PSU-160i) and dual 55 watt for the Indigo 1-DP
(PS-55i). The 150-watt PSU is also available with 48Vdc input, (PSU150i-48V).
All of the Indigo PSU’s have a built-in processor, which communicates with the front
panel display processor (referred to as a PIC) such information as power rail voltage
levels (+5.75V and –6.0 V) and the PSU fan speed. The PSU also stores its own serial
number in the non-volatile memory.
As the panel processor regularly receives status updates from the PSU processors about
power rails and fan speed, the front panel is then able to update its status LEDs and
control the alarm changeover relay according to the PSU condition. The relay contacts are
available on the Remote sockets at the rear of the frame.
A cool operating temperature is maintained by a de-mountable fan that is positioned in
front of the PSU bay, drawing air through the slotting in the front panel.
In general, the 75-watt PSU-75i was used in the 1U Indigo 1 frames and the 150-watt
PSU-150i is used in both of the larger 2U and 4U frames. The recently introduced PSU-
160i will in time supersede both the PSU-75i and PSU-150i. The dual PS-55i power
supply modules can only be fitted into specially modified Indigo 1-DP frame.
The Indigo 1 Crystal Vision frame with front control panel open
