Lear Siegler ADM 3A - 2.5 Initial Preparation; 2.6 Interface Information; 2.7 Installing the ADM 3 A

____ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
Whenever the ADM 3A is physically moved to a
warmer environment than its former location, be
sure to allow sufficient time for the equipment to
equalize
with the warmer location before
activating the terminal. Condensation developed
by the temperature differential may possibly
impair ADM 3A operation.
Figure 2-1, page 2-3 shows the ADM 3A
dimensions. Refer to Section I of this manual for
installation power and environmental
requirements. Installation of the ADM 3A
requires:
•
Table or desk mounting
• Standard three-pronged, 115-volt or 230-volt
power
outlet
• Cable connection to the computer, modem,
serial printer, or other auxiliary device. If
connection to a remote computer is desired, a
modem or data set may be required.
2.5 INITAL PREPARATION
Initial preparation includes making sure that the
ADM 3A will not be plugged into an AC line
power output that will damage the equipment; and
checking and/or resetting the terminal
configuration parameters through the set-up
mode as necessary.
2.5.1 Line Voltage Selection
The ADM 3A is shipped properly connected for
either 1I5-volt or 230-volt AC line power, as
specified in the purchase order. Any change for
operation with a different line voltage requires
changing components in the ADM 3A, which
should be accomplished only by authorized LSI
Maintenance Personnel. (Unauthorized circuit or
component changes invalidate the equipment
warranty.)
2.5.2 Set-Up Mode Preparation
The terminal operating configurations of the
ADM 3A are controlled by firmware "switches"
and have been pre-set at the factory to the default
conditions as indicated in Table 3-3 (page 3-6) of
Section III. By entering the set-up mode, the
operating configurations are displayed on the
status line (line 24) and can be changed.
2-2
2.6 INTERFACE INFORMATION
The ADM 3A may be connected directly to a local
computer, or connected via telephone data lines to
a
remote computer. Remote computer connections
usually require the use of a modem or data set.
Figure 2-2, page 2-4 shows the connector/pin
assignments for the modem and extension ports.
Figure 2-3, page 2-5 shows a typical ADM 3A
application. The ADM 3A"s modem and
extension port connectors are shown in Figure 2-
6, page 2-8.
2.6.1 RS-232C Modem Port Interface
The modem port interface is used to connect the
terminal directly to a computer" modem, or data
set in RS-232C or current loop application. See
Figure 2-4, page 2-6 and Figulre 2-5, page 2-7.
2.6.2 RS-232C Extension Port Interface
The extension port interface extends the standard
RS-232C capabilities of the ADM: 3A by allowing
the connection of a serial RS-23:2C peripheral.
The gated extension port mode, when selected in
the set-up mode, allows selective transmission of
data from the keyboard, in half-duplex mode, or
the communication line through the extension
port.
Note
The peripheral device that is attached
to the extension port must operate at
the same baud rate as the
communication line.
2.7 INSTALLING THE AD~,'1 3A
To install the ADM 3A, proceed as follows:
1. Check the power ON/OFF switch on the back
of the terminal to be sure itis off (Figure 2-6,
page 2-8).
2. Connect the data interface c:able(s) using the
appropriate interface infornlation in Figure
2-2, page 2-4, Figure 2-3, page 2-5 and
Subsection 2.6.
3. Plug the power cord to a grounded AC outlet
of the correct voltage.