V.24/Rs-232-C Communication Interface; V.24/Rs-232-C Printer Interface; Current Loop Interface; Composite Video Output - Facit 4431 Service Instruction

8
4
I N T E R F A C E
INFORMATION=
The interface connectors at the rear of
terminal are shown below.
4.1 V.24/RS-232-C COMMUNICATION INTERFACE
the
The pin assignments for the 25-pin male V.24/RS
-232-C communication connector are as follows:
Connector
Host Terminal
1 Ground
2
Serial Data Out
_..3
Serial Data In
~
-4.
4
RTS (always high)
5 CTS (Required) - note
-..
..... 6
DSR (Ignored)
7 Signal Ground
8 CD (Ignored, but monitored)
-.. 18
+5V - note 3
-4.
19
READY/BUSY - note 2
...._ 20
-...-
DTR (Alw'!Y._s hj_g_h)
NOTES: (1) CTS signal must be present at the
terminal (high) before data can be
sent to the host.
(2) READY
=
High
BUSY = Low
(3) +5V for Facit 5166 current loop
adapter, supplied by fitting a jum-
per on the main logic board.
4.2 V.24/RS-232-C PRINTER INTERFACE
The pin assignments for the female V.24/RS-232
-C printer connector are as follows:
Connector
Printer Terminal
1
Ground
2 Data In (X-ON/X-OFF from printer)
3 Data Out
7 Signal Ground
18 Not used
~~~~~~~~~~~-
19 Printer READY/BUSY - note
NOTES:
READY High
BUSY Low
4.3 CURRENT LOOP INTERFACE
Current loop interface adapter may be fitted
onto the I/0 interface connector (Facit 5166)
of the Facit 4431. The terminal connectors may
be internally linked (via jumper), to provide a
+5V supply to the adapter, which is all that is
required for passive/passive operation. Where
the user wishes to employ an active transmitter
an external 12V supply must be provided.
4.4 COMPOSITE VIDEO OUTPUT
The Facit 4431 provides a composite video for
use with an external video device. The compo-
site signal is a combination of the video sig-
nal and horizontal and vertical synchronisation
signals. Connection is via a female phono con-
nector. The output impedance is 75 ohms. The
video signal is of the RS170 type.
5 S E T - U P
FEATURES _ _ _ _
5.1 GENERAL FEATURES OF SET-UP MODE
Set-Up mode is entered by depressing the (SET-
UP) key on the keyboard. Initially the SET-UP A
display is shown.
At any time in the SET-UP mode the operator may
adjust the brightness of the screen, switch
between on-line and local operation, change or
recall the EAROM values or reset the terminal
to its initial state.
Exit from Set-Up mode (A, B or C) may be at any
time pressing the (SET-UP) key again. On exit
from SET-UP mode, the parameter value are pre-
served and will be displayed again whenever
SET-UP mode is entered (exept after Power Off)
You will find a detailed information about the
SET-UP mode in the Technical Description.