3
1. Functional description
1.1 GENERAL FUNCTIONS
Signal regeneration
The RT1-TP/FL processes the signal
shape and amplitude of the data recei-
ved.
1.2 SPECIFIC FUNCTIONS OF THE
TP INTERFACE
Link control
The RT1-TP/FL monitors the connected
TP line segments for short-circuit or
interrupt using idle signals during frame
pauses in accordance with IEEE standard
802.3 10BASE-T. The RT1-TP/FL does not
transmit any data in a TP segment from
which it does not receive an idle signal.
Note: A non-occupied interface is asses-
sed as a line interrupt. The TP line to ter-
minal equipment which is switched off is
likewise assessed as a line interrupt as
the de-energised transceiver cannot
transmit idle signals.
Auto polarity exchange
If the reception line pair is incorrectly
connected (RD+ and RD- switched) pola-
rity is automatically reversed.
1.3 SPECIFIC FUNCTIONS OF THE
F/O INTERFACE
Link control
The RT1-TP/FL monitors the connected
F/O lines for interrupts using idle signals
during frame pauses in accordance with
IEEE standard 802.3 10BASE-FL. The
RT1-TP/FL transmits no data to an F/O
line from which it is receiving no idle sig-
nal.
Low Light Detection: If the optical input
power decreases below the low light
threshold the transmit and receive path
will be disabled for data and the idle sig-
nal will be transmitted.
1.4 DISPLAY ELEMENTS
Equipment status
The 4 LEDs on top provide information
about the status which affects the func-
tion of the entire RT1-TP/FL.
P1 – Power 1
(green LED)
– lit: supply voltage 1 present
– lit not: – supply voltage 1 not present,
– hardware fault in RT1-TP/FL
P2 – Power 2
(green LED)
– lit: supply voltage 2 present
– lit not: – supply voltage 2 not present,
– hardware fault in RT1-TP/FL
Port status
These groups of LEDs display port-rela-
ted information.
DA STAT 1 – Data and Link status
TP-Port (Port 1)
(green/yellow LED)
– lit yellow:
RT1-TP/FL receives data
on the TP interface
Depending on the network load the LED
can lit short up to continiously.
– lit green:
RT1-TP/FL receiving idle
signals from the TP seg-
ment,
– the attached TP seg-
ment works properly
– lit not:
RT1-TP/FL not reveiving
idle signals from TP seg-
ment,
– the assigned TP port is
not attached,
– the attached device is
switched off,
– the TP line is interrup-
ted or short-circuited,
– RT1-TP/FL hardware
error.
DA STAT 2 – Data and link status of
F/O port (Port 2)
(green/yellow LED)
– lit yellow:
RT1-TP/FL receiving data
from F/O segment
Depending on the network load the LED
can lit short up to continiously.
– lit green:
RT1-TP/FL receiving idle
signals from the F/O
segment,
– the attached F/O seg-
ment works properly
– lit not:
RT1-TP/FL not reveiving
idle signals from F/O
segment,
– the assigned F/O port
is not attached,
– the attached device is
switched off,
– Low Light Detection
– the receive F/O line is
interrupted,
– RT1-TP/FL not recei-
ving data at the inter-
face,
– RT1-TP/FL hardware
error.
Data transmission
– If the RT1-TP/FL receives nothing at the
TP port nothing will be transmitted at
the F/O port even no idle signals.
– If the RT1-TP/FL receives nothing at the
F/O port nothing will be transmitted at
the TP port even no idle signals.
The RT1-TP/FL supports halfduplex
(HDX) and fullduplex (FDX) connections.
Changing the configuration is not neces-
sary.
1.5 CONTROLS
6-pin DIP switch
Using the 6-pin DIP switch on the top of
the RT1-TP/FL housing
– the message about the link statuses
can be suppressed by the indicator
contact on a port-by-port basis. Using
switch LA1, the message about the link
status of the TP port (port 1), using
switch LA2, the message about the link
status of the F/O port (port 2) is sup-
pressed. State of delivery: switch posi-
tion 1 (ON), i.e. message not suppres-
sed, the indicator contact passes the
faulty link status.
Fig. 1: 6-pin DIP switch
1.6 INTERFACES
TP connection
One 8pole RJ45 socket enables an inde-
pendent TP segment to be connected.
The housing of the socket is electrically
connected to the front panel. So it is also
connected to the housing of the RT1-
TP/FL.
– Pin configuraion
of the RJ45 socket:
– TD+: Pin 3,
TD-: Pin 6
– RD+: Pin 1,
RD-: Pin 2
– remaining pins: not configured.
Fig. 2: Pin configuration TP interface
n.c.
Pin 8
n.c.
Pin 7
TD-
Pin 6
n.c.
Pin 5
n.c.
Pin 4
Pin 3
TD+
Pin 2
RD-
Pin 1
RD+
LA1
Off On
LA2
Port 1 (TP)
not configured
not configured
not configured
Port 2 (FL)
not configured
about link status
Suppress message
via indicator contact
0
1
