ProLine P16800
17
2.7 Voltage Supply
P16800 is supplied via the output stages. The voltage supply is not galvanically isolated from the out-
put.
The typical voltage supply is nominally 12
…
24 V (the permissible voltage range is 10
…
32 V DC). The
voltage supply must be provided by a SELV, PELV power supply. The output stage and the associated
galvanically isolated input circuit are supplied via terminal V
S
or U
B
. The channel 1 and 2 supplies are
galvanically isolated.
The output of the P16800 can be supplied via a downstream controller or a power supply. The avail-
able currents (power output) are usually limited when power is supplied via a controller. If the current
is exceeded, an error message may be displayed in the controller. By selecting the terminal variant it is
possible to adjust the current through the downstream controller.
The following figures show the supply options for current and voltage outputs. The terminal options
shown differ in their use of terminal U
B
. If the U
B
terminal is not connected, the P16800 supplies the
output driver internally. This reduces the energy absorption and the temperature, so that the long-
term availability increases. If the downstream controller can evaluate reduced levels, the U
B
terminal
can remain open.
2.7.1 Supply of Active Current Output
Supply via the controller at terminal V
S
(active current output)
The current I
S
, which flows into terminal V
S
, is provided by the controller. The signal output voltage
U
Out
, or the load voltage of a channel is approx. 4 V. The use of the standstill detection with an output
voltage of 7.2 V is not possible in this terminal type.
