PSI-MOS-RS422/FO…
101974_en_04 PHOENIX CONTACT 12
Devices along the line:
T-couplers must be used along the line.
By default upon delivery, no changes to the setting are
required.
•Leave all DIP switches in the "OFF" position.
8.3 Operation in a star structure (DIP 1)
Devices in the star coupler topology
•For each device in the star coupler topology,
set DIP 1 to "ON" (STAR).
Devices at the end of a star line
No further settings are required in the default setting.
•Leave all DIP switches in the "OFF" position.
8.4 Operation in an INTERBUS system
No further settings are required in the default setting.
•Leave DIP 1 set to "OFF" (LINE) and DIP 2 set to "OFF"
(INVERS).
When using T-couplers, fiber optic port B must be
deactivated.
•Set DIP 4 to "ON" (END).
8.5 Connection to fiber optic interfaces from
third-party suppliers (DIP 2)
During the idle phase, fiber optic interfaces return to an idle
setting defined by the manufacturer. This idle setting may
vary for different manufacturers and devices. As fiber optic
interfaces can only be operated together if they have the
same idle setting, this should be set using the DIP switches.
For mixed operation of PSI-MOS with fiber optic interfaces
from other manufacturers, proceed as follows.
•Check the idle setting for the third-party interface:
Logic 1 = Light off
Logic 1 = Light on
•If necessary, adjust the idle setting of PSI-MOS using
DIP 2.
8.6 Activating the redundancy function (DIP 3)
For increased availability, redundant fiber optic connections
can be created using T-couplers. In this case, the
redundancy function must be activated at the start and end
of the redundant fiber optic connection.
•To do this, set DIP switch 3 (REDUNDANCY) to "ON".
When the redundancy function is enabled, data
communication takes place via fiber optic port A by default.
In the event that the signal level of the standard cable drops
to a critical level, it automatically switches to port B.
8.7 Disabling the second fiber optic port (DIP 4)
If the second fiber optic port (B) is not used for
PSI-MOS-RS422/FO… T T-couplers, it must be disabled.
Otherwise the red "ERR" LED will light up.
•Set DIP 4 to "ON" (END).
NOTE: Addressable RS-422/RS-485 4-wire
devices and a suitable communication protocol
are required for a star structure.
DIP 2 Idle setting Meaning
OFF = INVERS Light on1
1Default setting
Logic 1
ON = NORM Light off Logic 1
NOTE: If DIP 2 is set to "ON", fiber optic
diagnostics are not available via the LED bar
graph.
The LED bar graph can light up at high
transmission speeds or flash at low transmission
speeds. This display does not correspond to
continuous evaluation of the optical power.
NOTE: When connecting third-party devices,
observe the receiver sensitivity and overrange of
the fiber optic interfaces.
NOTE: Always connect redundant fiber optic
connections from fiber optic port A to port A of the
opposite device or from port B to port B of the
opposite device.