Operating instructions

User Interfaces RCS20 M:N Redundancy Switch
4-6 TM056 - Rev. 2.3
Never apply power to the slide out power supply modules unless they
are firmly seated in the RCU20, as there is a potential shock hazard at
the AC/DC Converter within the module.
Turn the unit on by switching both AC power switches (located above the power entry connectors at
the rear of the RCU20) to the on position. At power-up, the switch processor will perform a self-
diagnostic before beginning the primary monitor/control program. If a failure is detected during the
power-up tests, the Major Alarm LED will illuminate. If there is no failure, there will be no indication
on the front panel.
The initial field checkout of the switch can either be accomplished from the front panel or from a
terminal connected to the Terminal Port. Using a terminal has the advantage of providing full screen
access to all of the switch parameters, but requires a separate terminal or computer with terminal
emulation software. If a terminal is used, the Terminal Port baud rate must first be set from the front
panel.
4.5 RCS20 Front Panel Data Entry Screens
Control from the front panel of the RCS20 is implemented through a series of data entry screens
(“screens”) that are displayed on the front panel LCD. The screens are organized into groups of
related parameters and status values. Within a single group, the screens are displayed on the LCD
in a particular order; this order defines the ‘menu tree’ for that particular group of screen. Each
menu tree is accessed by pressing one of the following keys on the RCS20 front panel:
CONFIG SWITCH, CONFIG SYSTEM, MONITOR/ALARMS, and TEST in the SWITCH group, or
MOD CONFIG, DEMOD CONFIG INTFC CONFIG, MONITOR, TEST and ALARMS in the MODEM
group. For example, pressing the CONFIG SWITCH key causes CONFIG SWITCH SCREEN 0 -
MODEM CONNECTIONS to be displayed on the LCD (See Figure A-1). The first screen of each
menu tree is called the top screen of that particular menu tree. The menu trees for the SWITCH
group of screens are shown in Figures 3-2, 3-3, 3-4, and 3-5 for the CONFIG SWITCH, CONFIG
SYSTEM, MONITOR/ALARMS, and TEST menu trees respectively.
4.5.1 Basic Front Panel Controls
Once the top screen for a particular menu tree is displayed, either the parameters on the screen
can be edited, the next screen in the menu tree can be displayed, or the previous screen in the
menu tree can be displayed. Each of these actions is discussed in detail below.