User Manual DEV 1953
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Copyright DEV Systemtechnik GmbH 2015-2017
In addition, a Communication Protocol Handler (CPH) is implemented which
enables the use of one of the following remote protocols with different monitoring
and control capabilities:
Sandar Prosan protocol via serial interface (chapter 5.6);
Leitch protocol via serial interface and via Ethernet interface (chapter 5.7); and
QEC protocol via serial interface and via Ethernet interface (chapter 5.8).
The installation of sensing switch modules and of digital signal switch modules
enables the autonomous switching capability (chapter 3.1.3) of the device based on
the signal quality. Moreover, the TRAC option (chapter 3.1.5) permits a remote
device to control the switching of the DEV 1953.
Finally, the digital interface options (chapter 3.1.4) feature basic remote switching
functionality permitting the control of the device.
3.1.3
Autonomous Switching and Options
Among the broad choice of other switch modules, the DEV 1953 can be equipped
with sensing switch modules and/or with digital signal switch modules.
The sensing switch modules (and the digital signal switch modules) are special since
they permit the device to switch autonomously (please refer to chapter 5.1.3)
based on the RF level information (and on the digital signal quality information,
respectively) at both input ports of the module.
By default, the DEV 1953 provides autonomous switching capability from the
primary to the secondary input port(s).
With Option 22, the DEV 1953 is delivered with the main backup swap feature, i.e.
the autonomous switching works in both directions instead of switching from the
primary to the secondary input port(s), only.
With Option 28 the DEV 1953 is delivered with the automatic switch back feature
which permits the autonomous switching in both directions as well, but with an
adjustable hysteresis (for sensing switch modules) or with an adjustable delay (for
digital signal switch modules) when switching back from the secondary to the
primary input port(s).
The Web Interface enables the adjustment of the RF threshold levels for each input
port of a sensing switch module and enables the modification of settings for the
automatic switch back option.
3.1.4
Digital Interface Options
As an option (Option 56 for 24 V and Option 57 for 12 V) the product is equipped
with a digital interface module (please refer to chapter 3.2.26), e.g. to be
connected to a PLC (Programmable Logic Control).
With this interface, it is possible to switch up to 16 channels of the device and to
obtain switching status information for each channel.
3.1.5
TRAC Option
The DEV 1953 can be equipped with the TRAC (stands for Trap Receiver Action
Controller) option (Option 37), which permits the remote controlled switching of
the product based on SNMP traps, or based on the availability or on the absence of
a remote device (IP Monitoring). For more details, please refer to chapter 5.5.7.3.5.
