User Manual

- 13 -
SC-Port Pinouts
SC-Port to SC-Port Cable Wiring
ST-Port Pinouts
ST-Port to ST-Port Cable Wiring
ATTENTION
This is a Class 1 Laser/LED product. To avoid causing serious
damage to your eyes, do not stare directly into the laser beam.
Redundant Power Inputs
Both power inputs can be connected simultaneously to live DC power
sources. If one power source fails, the other live source acts as a backup,
and automatically supplies the EDS-405A/408A with p o we r.
Relay Contact
The Moxa EtherDevice switch has one relay contact located on the top
panel. For detailed instructions on how to connect the relay contact power
wires to the two middle contacts of the 6-contact terminal block connector,
see the Wiring the Relay Contact section. A typical scenario would be
to connect the fault circuit to a warning light located in the control room.
The light can be set up to switch on when a fault is detected.
The relay contact has two terminals that form a fault circuit for connecting
to an alarm system. The two wires attached to the fault contacts form an
open circuit when (1) a relay warning event is triggered, (2) the
EDS-405A/408A is the Master of this Turbo Ring, and the Turbo Ring is
broken, or (3) there is a start-up failure. If none of these three conditions
occur, the fault circuit will be closed.
Turbo Ring DIP Switch Settings
EDS-405A/408A series switches are plug-and-play managed redundant
Ethernet switches. The proprietary Turbo Ring protocol was developed by
Moxa to provide better network reliability and faster recovery time. Moxa
Tur bo Ring’s recovery time is less than 300 ms (Turbo Ring) or 20 ms
(Turbo Ring V2) —compared to a 3 to 5-minute recovery time for
commercial switches—decreasing the possible loss caused by network
failures in an industrial setting.