PSI-MOS-RS232/FO 1300 E
103266_en_02
PHOENIX CONTACT
10 / 17
8
Definition of fiber optic diagnostics
The quality of the path is determined using the incoming op-
tical power P
opt
and displayed using the LED bar graph.
You use DIP 2 to switch idle senders (reset period between
sending data) to continuous illumination (INVERS). This al-
lows for continuous fiber optic diagnostics.
If you switch DIP 2 to "ON" (NORM), the diagnostics are not
available via the LED bar graph.
As soon as the system reserve is reached, only the yellow
LED remains lit. At the same time, the signaling relay drops
and the switch contact opens. Data communication is still
possible.
Basic method of operation
The device has three interfaces for the RS-232 signal:
–
Electrical interface (D-SUB)
–
Fiber optic port
–
DIN rail connector
You can change communication between the ports via
DIP 1. This allows you to implement point-to-point or star
structures.
8.1
Port assignment for point-to-point connections
The electrical interface communicates with the fiber optic
port by means of full duplex mode. Internal data communi-
cation is disabled via the DIN rail connector.
Terms
–
DIP 1 = "OFF" (LINE)
–
One RS-232 device at each fiber optic coupler
–
The RS-232 devices can be addressed via communica-
tion software.
–
Up to 6 fiber optic converters in a linear structure
Figure 4
Port assignment for point-to-point connections
8.2
Port assignment for star structures
By means of full duplex mode, the electrical interface com-
municates with all connected fiber optic ports of the star
coupler via the DIN rail connector. Therefore internal data
communication is in the direction of the master (electrical in-
terface). Telegrams from the master are output to the fiber
optic ports of all connected devices via the DIN rail connec-
tor.
The telegrams received at the fiber optic ports of the slaves
are forwarded to the master exclusively via the DIN rail con-
nector. No telegrams are exchanged between the slaves.
Terms
–
DIP 1 = "ON" (STAR)
–
One RS-232 device at each fiber optic port
–
Only connect the master to the star coupler.
–
The RS-232 devices can be addressed via communica-
tion software.
Figure 5
Star structure port assignment
LED bar
graph
Receive
status
Optical power P
opt
Green
Green
Yellow
Very good
P
opt
is significantly greater
than the system reserve
Green
Yellow
Good
P
opt
is still greater than the
system reserve
Yellow
Critical
P
opt
has reached the system
reserve
Red
Error
P
opt
has sapped the system
reserve/broken fiber
If you switch DIP 2 to "ON", the FO diagnostics
are not available via the LED bar graph.
The LED bar graph can light up at high transmis-
sion speeds or flash at low transmission speeds.
This display does
not
correspond to continuous
evaluation of the optical power.
Master
T-BUS
D-SUB
FO port A
Slave
Master
T-BUS
D-SUB
FO port A
Slave 1
D-SUB
FO port A
T-BUS
Slave 2
