User Manual DEV 1951
40 Copyright DEV Systemtechnik GmbH 2004-2017
5.1.4 Individual/Simultaneous Switching Mode
Regarding the signal routing both channels of a DEV 1951 equipped with two switch
modules are independent from each other, but the device provides two switching
modes: Individual switching mode and Simultaneous switching mode.
In Individual switching mode, both switch modules can be operated independently
from each other. In Simultaneous switching mode, both switch modules are
switched synchronously to the same input port (i.e. either to input port "In A" or to
input port "In B").
The selection between Individual switching mode and Simultaneous switching
mode can be performed via the switching mode push button at the device panel
(labeled 6 in the figure of chapter 3.1.1) or via Web Interface (chapter 5.5.4.1) in
Local Mode, and via Sandar Prosan protocol (chapter 5.6.3.7) or via SNMP
(chapter 5.9.4.3.3) in Remote Mode.
Note:
If the first and the second switch module are in different positions, it is not
possible to activate the Simultaneous switching mode. In this case, the channel
LEDs of both channels at the device panel will toggle twice when operating in
Local Mode the switching mode push button. To overcome this situation the
same switching position has to be established by switching one of the channels
(in Individual switching mode) before activating the Simultaneous switching
mode, e.g. via operating the switching mode push button at the device panel.
Naturally, the Simultaneous switching mode is not available if the device is
equipped with a single switch module, only.
5.2 Initialization of the Device
The device performs a health check and a configuration check during power-up and
after a device reset. This takes about 60 seconds; there is no manual configuration
necessary, all settings (including the operation mode) after power-up or after a
device reset remain unchanged.
Note:
If not a single switch (or distribution amplifier) module is installed, the device
signalizes this by a permanent event indication (please refer to chapters 3.1.1 &
6.1.2).
5.3 Operation via the Device Panel
The local operation (via push buttons) and the status indication (via LEDs) of the
device panel were already explained in chapter 3.1.1.
Note:
The factory default for the operation mode is Remote Mode.
To operate the push buttons at the device panel, the DEV 1951 has to be
switched to Local Mode via the mode push button (or the "Local" push button)
at the device panel (please refer to chapter 3.1.1), via Web Interface (chapter
5.5.2), or via SNMP (chapter 5.9.4.3.1).
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