R.V.R. Elettronica TX10000U-KLC, User'S & Technical Manual

Page: 194 / 248

ELETTRONICA
Rev. 2.0 14/05/2015
188
User & Technical Manual
TX20000U-KLC
10.7.1 Description
A parallel-type interface is mounted on the top of the TX20000U-KLC, in which the diffe-
rent signals are available through terminal blocks (Figure 10-7-1). This interface is con-
nected to the CCU from which it receives the different signals and to which the eventual
commands are forwarded.
The card contains digital inputs, digital outputs and analog outputs. Among the digital
inputs, a “copy” of all the possible orders that can be given locally to the unit by using the
buttons of the control unit are displayed.
The digital outputs supply information concerning the status of the TX20000U-KLC.
The analogue outputs enable the remote control of the most important parameters, for
example the forward and reflected power.
This interface was designed for a maximum configurability and adaptability to the tel metry
systems to which it may be connected. For example, each digital input can be configured
through a jumper in order to be “active” when grounded or when connected to a supply
source b12V and +24V.
The scheme of one generic digital input is shown in Figure 10-7-2 b). Please pay attention
to the anti-parallel type optocouplers, so that if the jumper is closed between the pins 1
and 2, by grounding the DIGITAL INPUT, the input is active. On the contrary by closing
2 and 3, the input is active when the DIGITAL INPUT is connected to a positive voltage.
Each digital output can be configured individually as “Normally open “ or “Normally
closed “ (NO or NC). In Figure 10-7-2 a) the scheme of a generic digital output is shown.
Please note that when the jumper is closed between 1 and 2, the output is normally short-
circuited with the common pin, while in the other case the circuit is normally open.
It is important to remember that the different commands can be given to the unit through
the parallel interface only if the Local/Remote selector situated on the front panel is on the
“Remote” position.
Figure 10-7-1