Samson 3374 Series - Operating Level; Selecting the Operating Mode; Determining the Reading Direction

3-4 EB 8331-4 EN
Design and principle of operation
− Triggered when the position exceeds
the switching point: The limit contact is
activated when the actuator stem position
moves beyond the switching point. The
limit contact is deactivated when the ac-
tuator stem moves below the switching
point plus hysteresis.
− Triggered when the position moves be-
low the switching point: The limit contact
is activated when the actuator stem posi-
tion moves below the switching point.
The limit contact is deactivated when the
actuator stem position moves beyond the
switching point plus hysteresis.
An activated limit contact remains perma-
nently active if the switching point is smaller
or larger than the hysteresis. This limit con-
tact can only be deactivated by a restart (see
the 'Operation' section) or by resetting to
NONE (c24, c27).
RS-485 module
The RS-485 module allows the actuator to be
connected to a control station. Various com-
munications protocol (SSP or Modbus RTU
slave) are used for various functions. The RS-
485 module is required for Modbus RTU
communication.
Î ExcerptfromModbuslist:seeAnnexA.
Note