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945423-9701
Table 2-1. Terminal Site Installation Requirements
Requirement
Display Only
Keyboard Only
Display /Keyboard
Minimum Width
508mm
508mm
508mm
(20 in.)
(20 in.)
(20 in.)
Minimum Depth
483 mm
216 mm
711
mm
(19 in.)
(8.5 in.)
(28 in.)
Minimum Vertical
345 mm
Free access
to
343mm
Clearance
(13.6 in.)
keys (keyboard
is
(13.5 in.)
102 mm (4 in.) high)
Recommended Height
of
Mounting Surface from
Floor:
Seated Operator
711
t0914mm
711
mm
711 mm
(28 to 36 in.)
(28 in.)
(28 in.)
Standing Operator
1067
to
1270 mm
1067 mm
1067 mm
(42 to 50 in.)
(42 in.)
(42 in.)
Operating Temperatures
O°C
to
40°C*
O°C
to
40°C*
0° C to 40°C*
(32°F
to
104°p)
(32°F to 104°F*)
(32°F to 104°F*)
Operating Humidity
5%
to
95%
5%
to 95%
5%
to
95%
Altitude
3048 metres
3048 metres
3048 metres
(10,000 feet)
(10,000 feet)
(10,000 feet)
*At
sea
level. Derate to 32°C (90°F) at 3048 metres (10,000 feet).
2.2.1 MOUNTING SURFACE. The VDT components require adequate mounting space
on
a
flat, horizontal surface. The space must allow room at the rear
of
the display unit for cable
connections, clearance at the front
of
the display unit for adequate viewing, and operator access
to
the front
of
the
keyboard. The mounting surface must be free
of
any material
that
could
block
the- ventilation louvers on the underside
of
the display unit. Consideration
of
the
operator's normal position (sitting
or
standing) when using the terminal determines the height
of
the mounting surface.
2.2.2 CABLING
RESTRICTIONS. Cable lengths affect the positioning
of
the equipment at the
site.
If
the keyboard
is
operated
as
a separate unit from the display, it must remain within 1.52
metres (5 feet)
of
the keyboard input connector on the rear
of
the display due to the length
of
the
cable. This restriction also ensures
that
the operator can clearly view the display screen. In addition,
the display unit must be within 1.83 metres (6 feet)
of
a grounded
outlet
for input power. The
display can be positioned up
to
5 metres (16.4 feet) away from the controlling Model 990
Computer through the use
of
a single basic cable assembly. Distances in excess
of
5 metres (16.4
feet) up
to
a maximum
of
610 metres (2000 feet) from the
computer
can be achieved through the
use
of
an optional extension cable assembly. The extension cable assembly (Part Number 946093)
2-2
Digital Systems Division
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