2
0
1
8
-1
2
12
Product Description
3.3
Displays and Operating Elements
3.4
Signaling of the Connection Status
Real-time Ethernet systems monitor the distribution of process data and respond
quickly to changes in the connection status. The faster and more clearly an
interruption in the data traffic is detected, the faster and more targeted the
diagnosis and remedial measures: unreachable segments can be bridged or
supplied via redundant paths. The location of the fault can be detected
immediately.
The optical data coupler continuously monitors the cable connection to the
connected devices and the optical connection. The monitoring includes a
unidirectional interruption of the optical transmission and the termination of the
cable connection on the opposite side.
1
PWR
Lights up as soon as the optical data coupler receives operating voltage in the correct
manner.
2
ERR
Status of the overall connection. Lights up in the event of errors (insufficient signal
strength to establish the connection, e.g., misalignment, light beam obstructions, extra-
neous light in the optical channel). The LED does not light up during normal operation.
3
LAN
Status of the cable connection. The LAN LED (yellow) indicates a physical connection
to the next device on the cable. If this LED is not on, this indicates a connection problem.
The LAN LED lights up steadily when no data is being transported. Flashing of the LAN
LED indicates the presence of data packets on the LAN.
4
OPT
Status of the optical connection. The OPT LED flashes when the optical connection is
stabilized through correct alignment.
5
SIGNAL
The optical signal strength is displayed as an alignment aid during adjustment of the op-
tical data couplers. Additional information see chapter 5.1.
6
LASER ERROR
If the permissible internal temperature is exceeded, this LED flashes. The transmission
power is not reduced. If an internal activation error such as overcurrent is detected, the
laser is switched off, and an attempt is then made every second to resume norm al oper-
ation. Meanwhile, the laser-ERROR LED lights for 30 s to 60 s, even if the process was
a one-off, e.g., as the result of an EMC event.
PWR
S I G N A L
LASER
ERROR
L
A
N
O
P
T
E
R
R
1
2
3
4
5
6
