User Manual DEV 2190
38 Copyright DEV Systemtechnik GmbH 2009-2017
5 Operation of the Product
After going through the installation steps as described above, the device is ready to
use. There are different possibilities for monitoring and control, please refer to
chapter 3.1.2. Before the operation via each of these possibilities is explained, the
different device operation modes are described:
5.1 Modes of Operation
Local Mode, Remote Mode, and Auto Mode define the manner how the device is
controlled. The operation mode can be changed via the fan & monitoring module
(please refer to chapter 3.2.2), via Web Interface (chapter 5.4.2), and via SNMP
(chapter 5.5.4.3.1).
Note:
The Auto Mode is available only if the DEV 2190 is equipped with redundancy
switching functionality.
The factory setting for the operation mode is Remote Mode.
5.1.1 Local Mode
In Local Mode the device executes commands which are issued via push button
actions on the modules or (also in parallel) via Web Interface.
The SNMP remote interface is disabled for modifying the settings and for switching
commands, but enabled for status queries.
No autonomous switching is performed in Local Mode if the DEV 2190 is equipped
with redundancy switching functionality.
The "Remote" LED at the fan & monitoring module being off indicates Local Mode.
5.1.2 Remote Mode
The Remote Mode is implemented for the operation via SNMP.
In Remote Mode, the status of the DEV 2190 is still indicated via the LEDs on the
modules and via Web Interface, but the buttons on the modules are locked and the
control functionality of the Web Interface is disabled.
No autonomous switching is performed in Remote Mode if the DEV 2190 is
equipped with redundancy switching functionality.
The "Remote" LED at the fan & monitoring module is on in Remote Mode, but it
cannot be distinguished whether it is Remote Mode or Auto Mode.
5.1.3 Auto Mode
The Auto Mode is implemented for autonomous switching if the DEV 2190 is
equipped with redundancy switching functionality.
As in Remote Mode, the status of the device is indicated via the LEDs on the
modules and via Web Interface, but the buttons on the modules are locked and the
control functionality of the Web Interface is disabled.
The SNMP remote interface is disabled for modifying the settings and for switching
commands, but enabled for status queries.
The "Remote" LED at the fan & monitoring module is on in Auto Mode, but it cannot
be distinguished whether it is Auto Mode or Remote Mode.
5.1.3.1 Autonomous Switching Functionality for Redundant Amplifier Options
If Auto Mode is activated and if an installed redundancy unit is in "normal opera-
tion" -i.e. the redundancy unit is switched to the main (amplifier module) channel
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