R.V.R. Elettronica PJ5KPS, User'S & Technical Manual

Page: 44 / 168

PJ5KPS
38 / 80 User & Technical Manual Rev. 1.5 - 08/02/06
7.2 Parallel Interface
A parallel-type interface is mounted on the top of the PJ5KPS, in which the different
signals are available through terminal blocks [Figure 7-13]. This interface is connected
to the Control Unit from which it receives the different signals and to which the eventual
comands 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 PJ5KPS.
The analog 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
telemetry systems to which it may be connected. For example, each digital input can
be configurated 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 7-13 b). Please pay attention to the anti-parallele 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 7-13 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.
NB
It is important to remember that the different commands can be given to the unit
through the parallele interface only if the Local/Remote selector situated on the front
pannel is on the "Remote" position.
Figure 7-13 The parallel interface