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storage connections. The storage protection buffer
is also located in this frame. One main storage
module is used for all standard storage sizes up to
and including 128K bytes. Storage sizes greater
than 128K bytes use two main storage modules. The
frame capacity is two main storage modules, eight
printed circuit boards, and a hinged gate for
expansion.
The power frame contains the power converter-
inverter, the power sequencing and control circuitry,
and all regulators. The power frame also serves as
a cable path between the CPU and storage frames
and contains the Input/Output (I/O) panel for external
cables.
Frame Specifications
The following chart gives the physical specifica-
tions for the three frames that make up the 2050
Processing Unit.
CPU
Main storage
Power
Dimensions (inches)
Length
62.5
60.0
60.0
Width
29.5
24.0
24.0
Height
70.0
72. 5
72.5
Floor Area (sq
ft)
12.8
10.0
10.0
Weight (pounds)
2000
llOO
1500
Cabling
The external cable connectors for the 2050 are
located in the power and main storage frames. A
raised floor facilitates the routing of external cables
but is not an absolute necessity. Cables connecting
the channels to external devices pass through the
bottom of the power frame to reach the I/O connector
panel. Cables connecting the 2050 to shared or
large capacity storage pass through the bottom of the
main storage frame to reach the connector panel.
A maximum of twelve external cables may be
attached to the I/O panel in the power frame: two
for each of five channels (one multiplexor, three
selector, one high speed) and two for an external
operator's control panel.
POWER REQUIREMENTS
•
Three input voltage options.
•
Current requirements depend on storage size.
The 2050 Processing Unit is manufactured for one
of the following input voltage options:
60 cps± 1 cps
3 phase-4 wire delta
208/230 vac RMS± 10%
Option 3
Option 2
SO cps± 1 cps
3 phase-4 wire delta
19S/220/23S vac RMS± 10%
SO cps± 1 cps
3 phase-S wire
"Y"
380/42S vac RMS± 10%
Current requirements and heat dissipation are
dependent on storage size:
Power lnput (kva)
Service Rating (amperes)
Heat Dissipation (BTU/hr)
64K
9.0
30
14,900
128K
9.0
30
14,900
2S6K
10.6
30
18, 700
Appendix A•-System Characteristics
(3/71)
139
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