ETIC AFO485, Руководство пользователя, Страница: 21 / 36

AFO485 and RFO485 USER MANUAL ref 9011509-01 Page 21
3.7.2 Failsafe ring
- « Ringmaster » repeater
The Transmission failure output is closed
when a repeater detects the modulation on the two optical lines to
which it is connected, even if no data is received on either of the two
lines.
and
When data are received from both sides.
line 1 and line 2 are lit.
The Transmission failure output opens
when the modulation is lost on one of the 2 optic lines to which the
repeater is connected
or
When data are no longer received from both sides.
or
if the unit is powered off.
The corresponding led (line 1 or 2) is extinguished.
- Other repeaters in the ring
The Transmission failure output is closed when a repeater detects the
modulation on the two optical lines to which it is connected, even if no data
is received on either of the two lines.
The leds line 1 and 2 are lit.
The Transmission failure contact closes as soon as the modulation is
lost on one of the two lines to which the repeater is connected or if the unit
is powered off.
The corresponding led ( line 1 or 2) is extinguished.