Installation and Operation Manual
Page 82 of 156
[PVI-XXX.0-YY(-TL) - Rev:1.0]
The following tables show the signals
present on the terminal board:
Table 11-2: Communication signals in the
terminal block
Table 11-3: State signals in the terminal
block
Table 11-4: Control signals in the terminal
block
NOTICE
To the state clamps (Table 11-3) a low
voltage signal can be connected (e.g. 12V or
24V) with an absolute maximum amperage
of 1A
.
11.7.1
Connection for the user
RS485 serial communication
Proceed with the connection of the RS485
serial line.
See also Table Figure 11-11 and Table 11-2,
for the position and names of the signals in
the terminal block.
Chapter §8
The clamps from X20 to X23 and X24
to
X27
are
fully
removable,
facilitating
the
connection
operation.
Connect the 485+ signal/s to the X21D
clamp.
Connect the 485- signal/s to the X22D
clamp.
Connect the return/s (RTN or earth) to
the X20D clamp.
Connect the screening of the screened
cable to the X23D clamp.
After every connection try pulling the
cable to make sure that it is correctly
screwed.
If PVI-XXX.0(-TL) is not the last of the
chain, it is necessary to make sure that
the 120 ohm termination is not
present.
NOTICE
It is important to leave a gap of 30 cm of
cable pocketed in the ACBOX to allow the
full extraction of the AC drawer
.
Capitolo §17.7
