Table 3-2. Printer Interface Connections
PIN NO.
FUNCTION
~
T
1
Frame
Ground
3
Data
to
Printer
.......
7
Signal
Ground
20
Printer Ready
--
25
Printer Status
~
3.5.5 Current
Loop
Adapter
An
optional
15-pin connector
is
provided
on the back panel
of
the terminal
to
provide
for
the
current
loop
adapter. The adapter
will
make the terminal
compatible
with
two
basic
interface modes. A
modified
TTY
interface
for
some
mini
computers features
an
open
collector
output
and photoisolated
input
and
should
be
within
50
ft.
of
the terminal. A
single or balanced current
loop
interface
can
be
used up
to
2000
ft.
away, and
with
a
twisted, shielded,
two-pair
cable and a
slower baud rate,
it
may
be
useable up
to
6,000
ft.
away.
3.5.6 Video
Output
Connection
This
is
a BNC connector
to
drive a re-
mote
monitor
located up
to
1,000 feet
(304
meters)
from
the
SUPER BEE Terminal using
50-ohm coaxial cable
(RG-58/V).
3.5.7 1/0 Processor Board Strapping
The eight strapable
options
available
on the SUPER BEE 1/0 Processor Board
(Refer
to
Section 1.3.11)
are
implemented
by
installing the appropriate
jumper
on
the
16-pin
strapping pad (S1) located on
the
1/0 Processor
Board. A summary
of
these strapping selections
is
provided in
the
following
paragraphs. Figure
3-2 ii lustrates the
st~apping
locations.
3-5
Send
Control
Codes (PIN 1
AND
16)
With
no strap installed, all
escape
codes
will
be
performed and transmitted.
With
this
strap installed, all
escape
sequences
are
performed locally
only
but
not
transmitted.
Go-Off-Line
(PINS 2 and 15)
With
no strap installed and
with
the
terminal in on-line mode,
an
ETX
is
trans-
mitted
at the end
of
a
block
print
and the
on-line mode
is
maintained. With this strap
installed
the
unit
goes
off-line
at the end
of
the
block
print
and the
ETX
is
transmitted
to
the printer.
Store Special Functions (PINS 3 and 14)
With no strap installed, special func-
tion
codes
are
transmitted.
With
this strap
installed, special
functions
are
stored
only
and
not
transmitted.
External Clock (PINS 4 and 13)
With no strap installed, SUPER BEE
uses
its own internal clock.
With
this
strap
installed,
it
provides
for
the
use
of
external
clocks supplied by a modem
or
other
inter-
face.
Synchronous
or
Asynchronous Operation
(PINS 5 and 12)
With
no strap installed, the SUPER
BEE
is
configured
to
operate asynchronously.
When operating in the synchronous mode, the
generated
word
is
eight bits. However,
while
operating in
an
asynchronous mode, the
length
of
the generated
word
is
determined
by the
multiplier
toggle switch position.
In
the
110
position,
an
11-bit
word
is
generated.
A
10-bit
word
is
generated in the
150
position.
Back Search Block Transmit (Pl NS 6 and 1
..
!l
With
no strap installed, SUPER BEE
is
configured
to
do
a
block
transmission
from
the
first
character in
the
text.
With
a strap in-
stalled, SUPER BEE
is
configured
to
perform
a back search
to
any previous
ETX
and
start
to
transmit
from
the
first
character
of
the
next
line
to
the
next
ETX.
This
strap
is
in-
stalled
as
shipped
from
the
factory.
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